Progress 10/01/11 to 09/30/16
Outputs
Target Audience:Nematogists worldwide, Nematogists and quarantine workers worldwide by describing new nematode species which enables them to distinguish them from other destructive closely related nematode tests. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?
Nothing Reported
How have the results been disseminated to communities of interest?Through professional Journals, Conferences and proceedings. Resistance soybean lines to reniform , southern Root-knot and Soybean Cyst Nemtatodes were made available in Arkansas Soybean Variety Testing Program publications. What do you plan to do during the next reporting period to accomplish the goals?
Nothing Reported
Impacts
What was accomplished under these goals?
In the past I have identified many serious nematode pests. These include Soybean Cyst Nematode (Heterogera glycines) "Races", various root knot nematodes (Meloidogyne spp.), Pine wilt nematode (Bursaphelenchus xylophilis), White tip of rice caused by Aphelenchoides besseyi , and numerous less economically important species. With my supervision my students have made significant insight of species identity for the Dagger Nematode (M. R. Cho), the virus vectoring nematodes Xiphinema spp. and Longidorus spp. (W.Ye), Rotylenchulus spp. (P. Agudelo), Lance Nematodes (Hoplolaimus spp. (C,H Bae), and ring, sheath and spine (Criconematidae) nematodes (M. Cordero), and Root Knot Nematodes Meloidogyne spp. (C. Khanal). The samples for these works were from surveys, problem samples from growers and extension agents, and other Nematologists. Many of the early identifications (graduated in 1990) by Cho were a combination of morphological characters and statistical analyses. The newer students all used a combination of Morphological, Molecular, and Statistical procedures. Future identifications will also use these procedures. Soil and Plant surveys may be needed to locate distribution of new, rare, or exotic nematode species and their host ranges may be needed to be identified.
Publications
- Type:
Journal Articles
Status:
Accepted
Year Published:
2016
Citation:
Khanal, Churamani, Allen L. Szalanski, Travis Faske, and Robert T. Robbins. 2015. Host association of root-knot nematode (Meloidogyne spp.) Mtdna haplotypes in Arkansas. Nematropica
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2016
Citation:
Ma, Xinyuan, P. Agudelo, E. Bernard, C.M. Holguin and R.T. Robbins. 2016. Hoplolaimus Smokyi N. SP. (Hoplolaimidae), A Lance Nematode from the Great Smoky Mountains. 2016. Program and Abstracts, 55th Annual Meeting of the Society of Nematologists, Montreal Canada.
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Progress 10/01/14 to 09/30/15
Outputs
Target Audience:Nematogists worldwide, Nematogists and quarantine workers worldwide by describing new nematode species which enables them to distinguish them from other destructive closely related nematode tests. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?Bymy attending cotton and soybean workshops and nematology conferences. How have the results been disseminated to communities of interest?By writing journal articles, and attending cotton and soybean workshops and nematology conferences. What do you plan to do during the next reporting period to accomplish the goals?By adding populations to my Arkansas root-knot nematode greenhouse cultures to help show their distribution and relationships. By continuing my host plant studies for the pecan root-knot nematode and a species of Punctodera. With Terry Kirkpatrick and Travis Faske enlarge a survey of root-knot nematode species found in Arkansas. By testing soybean Plant Introductions with soybean cyst and southern root-knot nematode resistance for reniform nematode resistance. Continuing working with Weimin Ye (North Carolina Nematode Assay Service) and Paula Agudelo (Clemson) in identification and descriptions on sting and lance nematode undescribed species. By assisting the Arkansas Nematode Assay Service in identifying rare and new plant parasitic nematode species.
Impacts
What was accomplished under these goals?
I initiated Arkansas root-knot nematode greenhouse cultures to help show their distribution and relationships. I initiated host plant studies for the pecan root-knot nematode and a species of Punctodera. With Terry Kirkpatrick and Travis Faske startedand enlarged a survey of root-knot nematode species found in Arkansas. With Travis Faske identified nematodes in a row crop situation and compared them to nematode species in adjacent uncultivated soils to see differences and similarities. I tested 21 new soybean Plant Introductions with soybean cyst and southern root-knot nematode resistance for reniform nematode resistance. I am continuing tests to identifie resistance markers in both soybean and cotton. I am working with Weimin Ye (North Carolina Nematode Assay Service) and Paula Agudelo (Clemson) in identification and descriptions on sting and lance nematode undescribed species. I have contributed by permanent nematode slide collections to curated collections in Beltsville and the university of California - Riverside. I assist the Arkansas Nematode Assay Service in identifying rare and new plant parasitic nematode species.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Cordero, M. A., and R. T. Robbins. 2015. Description of Ogma panamensis n. sp. and new reports of known Criconematidae species in USA. Nematropica 45:222-241.
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Yongqing Jiao, Tri D. Vuong, Yang Liu, Zenglu Li, Jim Noe, Robert T. Robbins, Trupti Joshi, Dong Xu, J. Grover Shannon, and Henry T. Nguyen. 2015. Identification of antitative trait loci underlying resistance to southern root-knot and reniform nematodes in oybean
accession PI 567516C. Molecular Breeding (2015) 35:131. DOI 10.1007/s11032-015-0330-5
- Type:
Journal Articles
Status:
Published
Year Published:
2015
Citation:
Lee, Jeong-Dong, Hyun-Jee Kim, Robert T. Robbins, James A. Wrather, Jason Bond, Henry T. Nguyen, and J. Grover Shannon. 2015. Reaction of Soybean Cyst Nematode Resistant Plant Introductions to Root-Knot and Reniform Nematodes. Plant Breed. Biotech. 2015 (December) 3(4):346-354.
http://dx.doi.org/10.9787/PBB.2015.3.4.346
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2015
Citation:
Khanal, Churamani, R. T. Robbins, E. C. McGawley, and C. Overstreet. 2015. Meloidogyne spp. reported from Arkansas: past and present. Program and Abstracts, 54th Annual Meeting of the Society of Nematologists East Lansing, Michigan
|
Progress 10/01/13 to 09/30/14
Outputs
Target Audience: Nematode taxonomists worldwide. Nematologists and quarantine workers worldwide by describing new nematode species enabling them to distinguish between them and other often destructive closely related pests. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?
Nothing Reported
How have the results been disseminated to communities of interest? By publication injournal articles, soybean workshops, and conferences. What do you plan to do during the next reporting period to accomplish the goals? Several efforts were made during 2014 to collaborate with foreign and domestic nematologists on nematode taxonomic problems. We tested138 lines derived from the parent lines Magellan and PI 464198B in cooperation with Grover Shannon, soybean breeder from Missouri, looking to identify reniform nematode molecular resistance markers. My student C. Khanal gave a poster on “A new record of Meloidogyne partityla and an unknown species of Punctodera from Arkansas” at the American Phytopathological Society annual meeting in Minneapolis and a paper “Meloidogyne partityla, a new Root-Knot species to Arkansas. Southern American Phytopathological Society meeting, Dallas. I am continuing working to describe two species of Heterodera with Weimin Ye (North Carolina) and a species of Hoplolaimus with Paula Agudelo of Clemson and to establish the host range for each. Weimin and I are also attempting to identify to species both a North Carolina and an Arkansas population of Belonolaimus. My Masters student C. Khanal conducted a survey of Root-knot nematode species found in Arkansas using molecular methology. He also surveyed pecan grove, row crops, home gardens, and grasses from lawns and golf courses for Meloidogyne species that he is identifying and making live species collections for. He found 3 root-knot species M. haplanaria, M. marylandi, and M. partityla that are new to Arkansas. I am in the process of contributing byentirepermanent nematode slide collection to curated nematode collections and contributed several hundred slides to the Beltsville nematode collection.
Impacts
What was accomplished under these goals?
Several efforts were made during 2014 to collaborate with foreign and domestic nematologists on nematode taxonomic problems. We tested138 lines derived from the parent lines Magellan and PI 464198B in cooperation with Grover Shannon, soybean breeder from Missouri, looking to identify reniform nematode molecular resistance markers. My student C. Khanal gave a poster on “A new record of Meloidogyne partityla and an unknown species of Punctodera from Arkansas” at the American Phytopathological Society annual meeting in Minneapolis and a paper “Meloidogyne partityla, a new Root-Knot species to Arkansas. Southern American Phytopathological Society meeting, Dallas. I am continuing working to describe two species of Heterodera with Weimin Ye (North Carolina) and a species of Hoplolaimus with Paula Agudelo of Clemson and to establish the host range for each. Weimin and I are also attempting to identify to species both a North Carolina and an Arkansas population of Belonolaimus. My Masters student C. Khanal conducted a survey of Root-knot nematode species found in Arkansas using molecular methology. He also surveyed pecan grove, row crops, home gardens, and grasses from lawns and golf courses for Meloidogyne species that he is identifying and making live species collections for. He found 3 root-knot species M. haplanaria, M. marylandi, and M. partityla that are new to Arkansas. I am in the process of contributing by permanent nematode slide collection to curated nematode collections and send several hundred slides to the Beltsville nematode collection.
Publications
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2014
Citation:
Robbins, R. T., G. Shannon, P. Chen, S. K. Kantartzi, L. E. Jackson, E. E. Gbur, D. G. Dombek, J. T. Velie, and T. R. Faske. 2014. Reniform Nematode Reproduction on Soybean Cultivars and Breeding Lines in 2013. Proceeding ofthe2014 Beltwide Cotton Conferences, New Orleans Jan 6-8. Pgs.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2014
Citation:
Khanal, Churamani and R. T. Robbins. 2014. Meloidogyne partityla, a new root-knot species to Arkansas, Phytopathology 104(Suppl. 2):S2.6 Dallas TX Feb 2-3, 2014.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2014
Citation:
. Churamani Khanal, Weimin Ye and R. T. Robbins 2014. A new record of Meloidogyne partityla and an unknown species of Punctodera from Arkansas. American Phytopathological Society annual meeting, Minneapolis.
- Type:
Other
Status:
Other
Year Published:
2014
Citation:
Robbins, R. T. 2014. Reniform Nematode in the Southern USA. USB Soybean Nematode Research Meeting. March 11, 2014. Columbia, MO.
|
Progress 01/01/13 to 09/30/13
Outputs
Target Audience: Nematode taxonomists worldwide. Nematologists and quarantine workers worldwide by describing new nematode species enabling them to distinguish between them and other often destructive closely related pests. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided?
Nothing Reported
How have the results been disseminated to communities of interest? During journal articles soybean workshops, and nematology conferences. What do you plan to do during the next reporting period to accomplish the goals? I will continue concerted efforts to collaborate with foreign and domestic nematologists on taxonomic problems.I willtest lines derived by Grover Shannon andHenryNguyensoybean breeders from Missouri andZenglu Li soybean breeder for Georgia, looking to identify reniform nematode molecular markers. My student Marco Cordero gave a poster on Cricinematid nematodes at the Society of Nematologists meeting in Knoxville.I am continuing working to describe two species of Heterodera with Weimin Ye (North Carolina) and a species of Hoplolaimus with Paula Agudelo of Clemson and to establish the host range for each. Weimin and I are also attempting to identify to species both a North Carolina and an Arkansas population of Belonolaimus. My new Masters student C. Khanal gave a poster ona host range study on winter weeds for a Heterodera species identified as H. urticae found in Arkansas and known previously only from Europe and Asia. He is alsosurveying pecan and grasses for Meloidogyne species that he is identifying molecularly. I am in the process of contributing by permanent nematode slide collection to curated nematode collections.
Impacts
What was accomplished under these goals?
Concerted efforts were made during 2013 to collaborate with foreign and domestic nematologists on taxonomic problems.We tested190 lines derived from the parent lines Magellan and PI 567516C in cooperation with Grover Shannon, soybean breeder from Missouri, looking to identify reniform nematode molecular markers. My student Marco Cordero gave a poster on Cricinematid nematodes at the Society of Nematologists meeting in Knoxville.I am continuing working to describe two species of Heterodera with Weimin Ye (North Carolina) and a species of Hoplolaimus with Paula Agudelo of Clemson and to establish the host range for each. Weimin and I are also attempting to identify to species both a North Carolina and an Arkansas population of Belonolaimus. My new Masters student C. Khanal is conducting a host range study on winter weeds for a Heterodera species identified as H. urticae found in Arkansas and known previously only from Europe and Asia. He is alsosurveying pecan and grasses for Meloidogyne species that he is identifying molecularly. I am in the process of contributing by permanent nematode slide collection to curated nematode collections.
Publications
- Type:
Journal Articles
Status:
Published
Year Published:
2013
Citation:
Reyes Pe�a-Santiago , Joaqu�n Abolafia, Sergio �lvarez-Ortega,Weimin Ye and Robert T. Robbins. 2013. Axonchoides smokyensis sp. n. (Dorylaimida: Belondiridae) from the Great Smoky Mountains National Park; the second species of a very rare genus. Nematology 11:1-15
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2013
Citation:
R. T. Robbins, E. Shipe, G. Shannon, P. Chen, S. K. Kantartzi, L. E. Jackson, E. E. Gbur, D. G. Dombek, and J. T. Velie. 2013. Reniform Nematode Reproduction on Soybean Cultivars and Breeding Lines in 2012. Proceeding of the 2013 Beltwide Cotton Conferences, San Antonio, Texas, January, 2013. Pgs. 129-137.
- Type:
Journal Articles
Status:
Submitted
Year Published:
2013
Citation:
Cordero, Marco A,. and Robert T. Robbins Taxonomic identification of species of criconematidae from the permanent slide collection of R. T. Robbins. 2013. Nematropica
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Robbins, R. T. 2013. The Reniform Nematode, a Southern Problem. Some of my thoughts after 30 years of working with this nematode. Invited presention to the Soybean Breeders Workship, Feb. 12, 2013, St Louis.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2013
Citation:
Robbins, R. T., 2013. A History of the Reniform Nematode in the South. Southern Soybean Disease Workers, March,14 2013.
- Type:
Conference Papers and Presentations
Status:
Other
Year Published:
2013
Citation:
Cordero, Marco A. and Robert T. Robbins. 2013. Taxonomic identification of species of criconematidae from the permanent slide collection of R. T. Robbins. Society of Nematology Knoxville Meetings Program. Pg. 40.
- Type:
Conference Papers and Presentations
Status:
Published
Year Published:
2013
Citation:
Khanal, Churamani and R. T. Robbins. 2013. Expanded host range of Heterodera urticae from Arkansas. Society of Nematology Knoxville Meetings Program. Pg. 39-40.
|
Progress 01/01/12 to 12/31/12
Outputs
OUTPUTS: Concerted efforts were made during 2012 to collaborate with foreign and domestic nematologists on taxonomic problems. Several taxonomic studies and new species descriptions of Longidorids and other interesting soil inhabiting nematodes from North American and Iran in cooperation with Majid Pedram of the University of Tarbiat Modares have also been published. The longidorid nematodes are especially important because of the ability of several species to vector serious plant virus diseases and several are quarantined by foreign countries. I am continuing work on a molecular and morphological taxonomic study of a Rotylenchulus species found in a Lowell, Arkansas Vineyard. It seems to be closely related to the citrus nematode found on tropical and sub-tropical citrus. We tested 246 lines derived from the parent lines Magellan and PI 438489B and 242 lines derived from Magellan and PI437690 in cooperation with Grover Shannon, soybean breeder from Missouri, looking to identify reniform nematode molecular markers. My student Marco Cordero gave a poster on Cricinematid nematodes at the Society of Nematologists meeting in Savannah. Marco is in the finishing stages of writing his thesis as a series of 4 papers each of which involves different subgroup of these genera, all have been accepted for publication in the Journal of Nematology. I am continuing working to describe two species of cyst nematode with Weimin Ye (North Carolina) and a species of Hoplolaimus with Paula Agudelo of Clemson and to establish the host range for each. Weimin and I are also attempting to identify to species both a North Carolina and an Arkansas population of Belonolaimus. My new Masters student C. Khanal is conducting a host range study on winter weeds for a Heterodera species identified as H. urticae found in Arkansas and known previously only from Europe and Asia. I collaborated with Dr. Reyes Santiago from Spain on describing a new species of dorylaimoid nematode from a rare genus from the Smoky Mountains that has been accepted for publication by Nematology. I also cooperated with Dr. Howard Ferris of UC Davis and Dr. Gregor Yeates of New Zealand on a paper on questions arising from abnormal nematodes. PARTICIPANTS: The following were collaborators on projects with me during 2012: M. R Atighi,. E. Pourjam, M. Pedram with the Department of Plant Pathology, College of Agriculture, Tarbiat Modares University, Tehran, Iran; Weimin Ye, Nematologist, Section Chief, Nematode Assay Section, Agronomic Division, North Carolina Department of Agriculture & Consumer Services, 4300 Reedy Creek Road, Raleigh; Howard Ferris, Univ. Calif. - Davis; Gregor Yeates New Zealand; E. Shipe, Paula Agudelo Clemson Univ.; Prakash Arelli, USDA Jackson, TN, Grover Shannon - Univ of Missouri-Portageville; K. M., Rainey -VPI, , Stella K. Kantartzi,- Univ Southern Illinois, Carbondale; Prof. Dr. R. Pena Santiago, Universidad de Jaen, Spain. P. Chen L. E. Jackson, E. E. Gbur, D. G. Dombek, J. T. Velie, Marco Cordero, Allen L. Szalanski - Univ of Arkansas. TARGET AUDIENCES: Nematode taxonomists worldwide. Nematologists and quarantine workers worldwide by describing new nematode species enabling them to distinguish between them and other often destructive closely related pests. PROJECT MODIFICATIONS: Not relevant to this project.
Impacts
Collectively the taxomomic descriptions and identification I have either made or collaborated with of soil inhabiting nematode species may be useful in clearing quarantine shipments and making accurate and timely nematode species identifications. This is especially true for Longidorids and Trichodorids which include many virus vectors. The ability to accurately identify nematode species is critical when shipments are made to other countries that have nematode quarantines are in effect.
Publications
- Atighi, M. R., E. Pourjam, M. Pedram, W. Ye and R. T. Robbins. 2012. Molecular and morphological characterization of Ektaphelenchoides kelardashtensis sp. n. (Nematoda: Ektaphelenchinae) from northern Iran. Russian Journal of Nematology 20: In Press
- Ferris, H., R. Robbins, G. Yeates. 2012. Atypical Development in Plant and Soil Nematodes. Journal of Nematology 43: In Press
- Atighi, M. R., E. Pourjam, M. Pedram, W. Ye and R. T. Robbins. 2012. Molecular and morphological characterization of Ektaphelenchoides hunti sp. n. (Nematoda: Ektaphelenchinae) from northern Iran. Russian Journal of Nematology 20:37-44.
- Robbins, R. T., E. Shipe, P. Arelli, G. Shannon, K. M. Rainey, P. Chen, Stella K. Kantartzi, L. E. Jackson, E. E. Gbur, D. G. Dombek, & J. T. Velie. 2012. Reniform nematode reproduction on soybean cultivars and breeding lines in 2011. Proceeding of the 2012 Beltwide Cotton Conferences, Atlanta, Georgia, January 4-7, 2012, Pgs. 167-174.
- Cordero, M. A., Robert T. Robbins, Allen L. Szalanski. 2012. Taxonomic and Molecular Identification of Bakernema, Criconema, Hemicriconemoides, Ogma and Xenocriconemella Species (Nematoda: Criconematidae). Journal of Nematology 44:435-454.
- Cordero, Marco. A., Robert T. Robbins, Allen L. Szalanski. 2012. Molecular Based-Phylogenetic Relationships In The Superfamily Criconematoidea. Journal of Nematology: In Press
- Robbins, R. T., E. Shipe, P. Arelli, G. Shannon, K. M. Rainey, P. Chen, S. K. Kantartzi, L. E. Jackson, E. E. Gbur, D. G. Dombek, and J. T. Velie. 2012. Reniform nematode reproduction on soybean cultivars and breeding lines in 2011. Poster and abstract. Program of the 2012 Beltwide Cotton Conferences, Orlando.
- Robbins, R. T., L. E. Jackson, K. Rowe, D. Crippen and T. Kirkpatrick. 2012. Soybean Varieties With Reniform and Root-Knot Nematode Resistance, 1998-2011. Abstracts, 39th Annual Meeting, Southern Soybean Disease Workers, March 7-8, 2012 Pensacola, FL. P. 27.
- Robbins, Robert T., and Weimin Ye. 2012. Host Range Additions for Heterodera Urticae And Cactodera Betulae from Arkansas. Society of Nematology Savannah Meetings. Abstract.
- Cordero, M., and R. T. Robbins. 2012. Caloosia uarki, Criconema arkaense, Criconema warreniense, Hemicycliophora wyei and Mesocriconema ozarkiense, new species in Criconematoidea). Society of Nematology Savannah Meetings. Abstract.
- Cordero, M.. A., R. T. Robbins, A. L. Szalanski. 2012. Taxonomic and Molecular Identification of Mesocriconema and Criconemoides Species (Nematoda: Criconematidae). Journal of Nematology 44:407-434.
- Cordero, M.. A., R. T. Robbins, A. L. Szalanski. 2012. Taxonomic and Molecular Identification of Hemicaloosia, Hemicycliophora, Gracilacus And Paratylenchus Species (Nematoda: Criconematidae).Journal of Nematology: In Press.
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Progress 01/01/11 to 12/31/11
Outputs
OUTPUTS: During 2011 concerted efforts were made to collaborate with foreign and domestic nematologists on taxonomic problems. A paper on secondary molecular structure of the nematode family Hoplolaimidae by former Ph. D student Chang-Hwan Bae has been published. Several taxonomic studies and new species descriptions on Longidorids and other interesting soil inhabit nematodes for North American and Iranian nematodes have also been published. The longidorid nematodes are especially important because of the ability of several species to vector serious plant virus diseases and several are quarantined by foreign countries. I am working on a molecular and morphological taxonomic study of a Rotylenchulus species found in a Lowell, Arkansas Vineyard in. It seems to be closely related to the citrus nematode found on tropical and sub-tropical citrus. We tested over 250 lines derived from the parent lines Magellan and PI 438489B.with Grover Shannon, soybean breeder from Missouri looking to identify reniform nematode molecular markers. My student Marco Cordero gave a poster titled: Phylogenetic relathionships among nematodes of the suborder criconematina using its-1 rdna region. We have representatives of the following genera: Mesocriconema, Criconema, Ogma, Tylenchulus (from grape in Arkansas), Nothocriconema, Criconemoides, Hemicycliophora, Hemicriconemoides, Paratylenchus, Gracilacus, Caloosia, Loofia, and Xenocriconemella. Marco is in the process of writing his thesis as a series of 5 papers each of which involves different subgroup of these genera. I am working to describe two species of cyst nematode with Weimin Ye (North Carolina) and a species of Hoplolaimus with Paula Agudelo of Clemson and to establish their host range. For one of these species we published an abstract on at the 2011 Corvalis Society of Nematology meeting. The other study is just under way and deals with a cyst on native plants in the White river Flood plain just North of I-40. Weimin and I are also attempting to identify to species both a North Carolina and an Arkansas population of Belonolaimus. PARTICIPANTS: Dr Grover Shannon and I are attempting to establish genetic markers for reniform in soybean. Majid Pedram, (Ph. D. Student, Department of Plant Pathology, College of Agriculture, University of Tarbiat Modares, Tehran, Iran) are working on several taxonomic descriptions of soil inhabiting nematodes from Iran. We are also working to update keys and species lists of the genera Longidorus and Xiphinema of which several are plant parasites and include several virus vectors. Weimin Ye and Paula Agudelo are working on species descriptions of several nematode plant parasites. Larry Jackson does all greenhouse work and nematode extractions. TARGET AUDIENCES: Nematode taxonomists worldwide. Grape growers of Arkansas with possible Tylenchulus infected vineyards by identifying the nematodes both morphologically and molecularly and establishing their host range. Nematologists and quarantine workers worldwide by describing new nematode species enabling them to distinguish between them and other often destructive closely related pests. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
Our taxomomic descriptions and identification of soil inhabiting nematode species of cysts, Longidorid and Trichodorid may be useful in clearing quarantine shipments and making nematode species. identifications. This is especially true for Longidorids and Trichodorids which include many virus vectors. The ability to accurately identify nematode species is critical when shipments are made to other countries that have nematode quarantines are in effect.
Publications
- Bae, C. H, R. T. Robbins, and A. L. Szalanski. 2011. Secondary structure models of Hoplolaiminae species for D2-D3 expansion segments of 28S rRNA. Journal of Nematology 42:218-229.
- Chen, P., T. Ishibashi, C. H. Sneller, J. C. Rupe, D. G. Dombek, R. T. Robbins, and R. D. Riggs. 2011. Registration of UA 4910 Soybean. Journal of Plant Registrations, Vol. 5, No. 1, January 2011.
- Chen, P., T. Ishibashi, C. H. Sneller, J. C. Rupe, D. G. Dombek, and R. T. Robbins. 2011. Registration of R99 1613F, R01 2731F, and R01 3474F Soybean Germplasm Lines with Diverse Pedigrees. Journal of Plant Registrations, Vol. 5, No. 2, May 2011.
- Cordero, M., R. T. Robbins, and A. L. Szalanski. 2011. Phylogenetic relathionships among nematodes of the suborder criconematina using ITS-1 rdna region. Society of Nematologists Program, Corvalis, OR: Pg. 61-62. (abst)
- Ghaemi, R., E. Pourjam, M. Pedram, R. T. Robbins, W. Ye and W. Decraemer. 2011. Morphological and molecular characterisation of Xiphinema zagrosense sp. n. (Dorylaimida: Longidoridae) from the Zagros Mountains, Iran. Nematology (In Press)
- Pedram, M., E. Pourjam, R. T. Robbins,Weimin Ye and R. Pena-Santiago. 2011. Description of Rhyssocolpus vinciguerrae sp. n. (Dorylaimida, Nordiidae) from Iran and the first molecular study of this genus. Nematology, 2011, Vol. 13:1-11.
- Pedram, M., G. Niknam, M. T. Vinciguerra, W. Ye, and R. T. Robbins. 2010. Description of Paractinolaimus decraemerae sp. n. and redescription of P. parietinus Eroshenko, 1977 (Dorylaimida: Actinoloaimidae) from northwestern Iran. International Journal of Nematology 20:169-178.
- Pedram, M., E. Pourjam, R. T. Robbins, W. Ye, M. R. Atighi, and R. Pena-Santiago. 2011. Description of one new, and new data on two known, species of Enchodelus Thorne, 1939 (Dorylaimida: Nordiidae) from Iran. Nematology 13:729-740.
- Pedram, M., E. Pourjam, W. Ye, M. R. Atighi, R. T. Robbins and A. Ryss. 2012. Description of Bursaphelenchus mazandaranense sp. n. (Nematoda: Parasitaphelenchidae) from Iran. Russian Journal of Nematology, 2011, 19:121 - 129.
- Shannon, J.G., J. A. Wrather, M.A. Woolard, S.L. Smothers, S.M. Pathan, H.T. Nguyen, and R.T. Robbins. 2011. 805-11482- a high yielding soybean with resistance to multiple diseases and nematode species. Proceeding of the Southern Soybean Disease Workers. Fort Walton Beach FL. (abst)
- Pedram, M., E. Pourjam, R. T. Robbins, W. YE, M. R. Atighi and W. Decraemer. 2012. Morphological and molecular characterisation of Xiphinema mazandaranense n. sp. (Dorylaimida: Longidoridae), a new member of the Xiphinema pyrenaicum species complex. Nematology, Vol. 14(1), 109-119.
- Robbins, R. T., and L. E. Jackson. 2011. Soybean Varieties and Breeding Lines Shown With Resistance to Reniform Nematode in Greenhouse Tests, 1998-2010. Proceeding of the Southern Soybean Disease Workers. Fort Walton Beach FL. (abst)
- Robbins, R. T., E. Shipe, P. Arelli, P. Chen, G. Shannon, K. M. Rainey, L. E. Jackson, E. E. Gbur, D. G. Dombek, and J. T. Velie. 2011. Reniform Nematode Reproduction on Soybean Cultivars and Breeding Lines in 2010. Proceedings of the Beltwide Cotton Conferences, Atlanta. (abst)
- Robbins, Robert T., and W. Ye. 2011. Heterodera urticae, Cooper 1955, a Heterodera goettingiana-group cyst nematode found in Arkansas. Society of Nematologists Program Corvalis, OR; Pg.132-133. (abst)
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Progress 01/01/10 to 12/31/10
Outputs
OUTPUTS: During 2010 efforts were made to collaborate with foreign and domestic scientists on taxonomic problems. One paper on secondary molecular structure of the nematode family Hoplolaimidae has been submitted from the thesis of former Ph. D student Chang-Hwan Bae. Several taxonomic studies and new species descriptions on Longidorids and other interesting soil inhabit nematodes are under way for North American and Iranian nematodes. The longidorid nematodes are especially important because of the ability of several species to vector serious plant virus diseases. and several are quarantined by foreign countries. I am working with Drs. Keith Striegler (Univ. Missouri) and C. F. Hwang (Missouri State) on a survey and taxonomic study of Xiphinema species in Vinyards (wine grapes)in both Arkansas and Missouri. We are testing 190 lines derived from the parent lines Magellan and PI 438489B.My student, Marco Cordero, gave a poster outlining his approach to morphometric, photographic and molecular characterization of genera and species of Criconemoidea. We have samples from the following states: Florida, Missouri, North Carolina, Arkansas and are awaiting samples from Kenya and Hawaii. We have representatives of the following genera: Mesocriconema, Criconema, Ogma, Tylenchulus (from grape in Missouri and Arkansas), Nothocriconema, Criconemoides, Hemicycliophora, Hemicriconemoides, Paratylenchus, Gracilacus, Caloosia, Loofia, Xenocriconemella and 4 more ring type nematodes for identification. He is in the process of morphometric studies and identifications at the moment and will continue molecular ids in the spring of 2011. PARTICIPANTS: Drs. Keith Striegler (Univ. Missouri) and C. F. Hwang (Missouri State) and I are conducting a survey and taxonomic study of Xiphinema species in Vinyards (wine grapes)in both Arkansas and Missouri. Majid Pedram, (Ph. D. Student, Department of Plant Pathology, College of Agriculture, University of Tarbiat Modares, Tehran, Iran) are working on several taxonomic descriptions of soil inhabiting nematodes from Iran. Several are Plant parasites and possible virus vectors. TARGET AUDIENCES: Grape growers and vintners of Arkansas and Missouri with possible virus infected vineyards by identifying both the nematodes and viruses both morphologically and molecularly. Nematologists and quarantine workers worldwide by describing new nematode species enabling them to distinguish between them and other often destructive closely related pests. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
Our new information on identification of species of soil inhabiting nematode species, especially Longidorid and Trichodorid virus vectoring nematodes may be useful in clearing quarantine shipments and making nematode species identifications. The ability to accurately identify nematode species is very important when shipments are made to other countries where nematode quarantines are in effect.
Publications
- Ye, Weimin and R.T Robbins. 2010. Morphology and Taxonomy of Xiphinema (Nematoda: Longidoridae) Occurring in Arkansas, USA. Acta Agriculturae Universitatis Jianxiensis 32:928-945.
- Pedram M., G. Niknam, M. T. Vinciguerra, W. Ye and R. T. Robbins. 2010. Morphological and molecular characterisation of Paractinolaimus sahandi n. sp. (Nematoda: Actinolaimidae)from Sahand Mountains in Iran. Journal of Helminthology doi:10.1017/ S0022149X10000556 First view article
- Pedram, M., G.Niknam, R. T. Robbins, W. Decraemer, W. Ye and Y. Qing . 2010. First record of Trichodorus primitivus (de Man, 1880) Micoletzky, 1922 and morphological and molecular identification of Longidorus elongatus (de Man, 1876) Micoletzky, 1922 from Canada. Plant Disease (Disease notes) 94:782
- Pourjam, E,. M. Pedram, M. T. Vinciguerra, and R. T. Robbins. 2010. 2010. Enchodelus decraemerae n. sp and Enchodorus dolichurus Vinciguerra, 1976 (Dorylaimida: Nordiidae), two rare species from Iran. Russian Journal of Nematology 18:191-197. Niknam,G., M. Pedram, E. G. Nejad, W. Ye, R. T. Robbins and Z.T. Maafi. 2010. Morphological and molecular characterization of Longidorus tabrizicus n. sp. and L. sturhani Rubtsova, Subbotin, Brown and Moens, 2001 (Nematoda: Longidoridae) from north-western Iran. Russian Journal of Nematology 18:127-140
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Progress 01/01/09 to 12/31/09
Outputs
OUTPUTS: Efforts were made to collaborate with foreign and domestic scientists on taxonomic problems. Three papers on morphological and molecular relationships on the nematode family Hoplolaimidae are in press or published from the thesis of a former Ph. D student Chang-Hwan Bae. Several taxonomic studies and new species descriptions on Longidorids and other interesting nematodes are under way for American and Iranian nematodes. The longidorid nematodes are especially important because of the ability of several species to vector serious plant virus diseases. And several are quarantined by foreign countries. A study by Ph. D. student, Marco Cordero, on morphological and molecular identification of members of the super family Criconematoidea is under way and making good progress. PARTICIPANTS: I collaborated with several foreign and domestic scientists on taxonomic descriptions. Majid Pedram, and G. Nikham are associated with the university of Tabriz in Iran. Weimin Ye (My former Graduate Student) is the Project Leader of the North Carolina Nematode Assay program. We are collaborating on several taxonomic studies of longidoridae. Chang-Hwan Bae(My former Graduate Student)is a Korean scientist I have collaborated with in the past on taxonomic problems. Grover Shannon is a soybean breeder from the University of Missouri who I have collaborated with on a variety of soybean problems in the past few years. TARGET AUDIENCES: Nothing significant to report during this reporting period. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
The information on identification of new and existing species of Longidoridae and Hoplolaimidae nematode species may be useful in clearing quarantine shipments and making nematode species identifications. The ability to accurately identify nematode species is very important when shipments are made to other countries where nematode quarantines are in effect.
Publications
- Pedram,M., G. Nikam, P. Guerrero,W. Ye and R. T. Robbins. 2009. Morphological and molecular caracterisation of Enchodelus babakicus n. sp. and E. macrodorus Thorne, 1939 (Nematoda: Nordiidae) from Iran. Nematology 11:895-907.
- Pedram,M.,G. Niknam,W. Ye and R. T. Robbins. 2009. First record of Ecphyadophora quadralata Corbett, 1964 from Iran and a study of its phylogenetic relationship based on the analysis of partial 18S rDNA sequences.International Journal of Nematology 19:16-22.
- Bae, C. H., A. L. Szalanski and R. T. Robbins. 2009. Phylogenetic analysis of the Hoplolaiminae inferred from combined D2 and D3 expansion segments of 28S rDNA. Journal of Nematology 41:28-34.
- Robbins, R.T.,Weimin Ye, and Majid Pedram. 2009. Longidorus ferrisi n. sp. from California Citrus. Journal of Nematology 41:(In Press)
- Bae, C. H., A. L. Szalanski and R. T. Robbins. 2009. Genetic variation of Hoplolaimus columbus populations in the United States using PCR-RFLP analysis of nuclear rDNA ITS regions. Journal of Nematology 41: (In Press)
- Robbins, R. T., C. H. Bae, W. Ye, and M. Pedram. 2008. Xiphinema bernardi n. sp. (Nematoda: Longidoridae) from the Great Smoky Mountain National Park. Journal of Nematology 41: (In press)
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Progress 01/01/08 to 12/31/08
Outputs
OUTPUTS: Efforts are made to collaborate with foreign scientists on taxonomic problems. Three papers on morphological and molecular relationships on the nematode family Hoplolaimidae are in progress from the thesis of a former Ph. D student Chang-Hwan Bae and 2 have been published. Several taxonomic studies and new species descriptions on Longidorids are under way of American and Iranian longidorids. These nematodes are especially important because of the ability of several species of to vector serious plant virus diseases. Several are quarantined by foreign countries. A study with a new Ph. D. student, Marco Cordero, on morphological and molecular identification of members of the superfamily Criconematoidea is just under way. PARTICIPANTS: I collaborated with several foreign scientists on taxonomic descriptions. Majid Pedram, and G. Nikham are associated with the university of Tabriz in Iran. We are collaborating on several taxonomic studies of longidoridae. Dong-Guen Kim and Chang_Hwan Bae are Korean scientists who I have collaborated with in the past on taxonomic problems. Grover Shannon is a soybean breeder from the University of Missouri who I have collaborated with on a variety of soybean problems in the past few years. TARGET AUDIENCES: Nothing significant to report during this reporting period. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Impacts
The information on identification of new Longidoridae and Hoplolaimidae species may be useful in clearing quarantine shipments and species identifications. The ability to identify species is very important when shipments are made to other countries where nematode quarantines are in effect.
Publications
- Kim, Dong-Guen, R. T. Robbins. 2008. A new nematode species (Aphelenchida: Aphelenchoididae) associated with the bark beetle, Scolytus seulensis, in Korea. Journal of Asia-Pacific Entomology 11:31-35.
- Pedram, Majid, G. Nikham, R. T. Robbins, Weimin Ye, and A. Karegar. 2008. Xiphinema iranicum n. sp. from northwestern Iran. Nematology 11:11-21.
- Pedram, Majid, Gholamreza Niknam, Robert T. Robbins, Weimin Ye, and Akbar Karegar. 2008. Longidorus kheirii n. sp. (Nematoda: Longidoridae)from Iran. Systematic Parasitology 71: 100-211.
- Shannon, J. G., Lee, Jeong-Dong, Wrather, J. Allen, Sleper, David A., Mian, M. A. R., Bond, Jason P., and Robbins, Robert T. 2008. Registration of S99-2281 Soybean Germplasm Line with Resistant to Frogeye Leaf Spot and Three Nematode Species. Journal of Plant Registrations 3:94-98.
- Bae, Chang_Hwan, Robert T. Robbins and Allen L. Szalanski. 2008. Molecular identification of some Hoplolaimus species from the USA based on duplex PCR, multiplex PCR and PCR-RFLP analysis. Nematology 40:201-209.
- Bae, C. H., A. L. Szalanski, and R. T. Robbins. 2008. Molecular Analysis of the Lance Nematode, Hoplolaimus spp. Using the First Internal Transcribed Spacer and the D1-D3 Expansion Segments of 28S Ribosomal DNA. Journal of Nematology 40:201-209.
- Kulkarni, S. S., S. G. Bajwa, R. T. Robbins, T. A. Costello, T. L. Kirkpatrick. 2008. Effect of soybean cyst nematode (heterodera glycines) resistance rotation on SCN population distribution, soybean canopy reflectance, and grain yield. Transactions of the American Society of Agricultural and Biological Engineers. 51:1511-1519.
- Pedram, Majid, Gholamreza Niknam, Pablo Guerrero,Weimin Ye, and Robert T. Robbins. 2008. Additional data on Enchodelus veletensis Guerrero, LiEbanas & PeNa-Santiago, 2007 (Dorylaimida: Nordiidae) from Iran, and phylogeny of the genus. Nematology In Press.
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Progress 01/01/07 to 12/31/07
Outputs
In 2007 128 lines new to the Arkansas Soybean Variety program were tested with the resistant lines Forrest, Anand, and Hartwig and the susceptible line Braxton and inoculated fallow. No data is available at the time of this report. A total of 48 lines in a test of the Arkansas (6 lines), Clemson (30 lines), and USDA Jackson TN (12 lines) are being test at the same time. The objectives of these studies were 1) to identify new soybean cultivars that are poor hosts for the reniform nematode that would be useful in rotation with soybean, cotton, or other reniform nematode susceptible crops in reniform nematode infested fields and 2) to identify useful breeding lines for use in selection of new reniform resistant cultivars. Several papers on morphological and molecular relationships on the nematode family Hoplolaimidae are in progress from the thesis of a former Ph. D student Chang-Hwan Bae. Several taxonomic studies and new species descriptions on Longidorids are under
way. These nematodes are important because of the ability of several species of Longidorids to vector serious plant virus diseases. Several are quarantined by foreign countries.
Impacts
The reniform nematode studies could prove very useful to producers with a damaging level of this nematode in their production fields by reducing reniform to below damaging levels. The information on the Hoplolaimidae may be useful in quarantine shipments and species identifications. The ability to identify species is very important when shipments are made to other countries.
Publications
- Robbins, R. T., E. Shipe, P. Arelli, P. Chen, G. Shannon, L. Rakes, L. E. Jackson, E. E. Gbur, and D. G. Dombek. 2007. Reniform Nematode Reproduction on Soybean Cultivars and Breeding Lines in 2006. Proceedings of the Beltwide Cotton Conferences, New Orleans. 161-169.
- Ha, Bo-Kuen, R. T. Robbins, F. Han, R. Hussey, J. Soper, and H. R. Boerma. 2007. SSR Mapping and Confirmation of Soybean QTL from PI 437654 Conditioning Resistance to Reniform Nematode. Crop Science 47:1336-1343.
- Wu, Y., J. Zheng, and R.T. Robbins. 2007. Molecular Characterization of a Xiphinema hunaniense population with morphometric data of all four juvenile stages. Journal of Nematology 39:37-42.
- Shannon, J. G., J. A. Wrather, D. A. Sleper, R. T. Robbins, H. T. Nguygen, and S. C. Anand. 2007. Registration of Jake Soybean. Journal of Plant Registrations 1:29-30.
- R. T. Robbins, E, Shipe, G. Shannon, P. Arelli, and P. Chen. 2007. Public soybean breeding lines tested for reniform nematode Rotylenchulus reniformis reproduction. Journal of Nematology 39:92.
- Decraemer, Wilfrida, and R. T. Robbins. 2007. The who, what, and where of Longidoridae and Trichodoridae. Phytopathology 97:S133.
- Giammaria, S. L., J. C. Rupe, and R. T. Robbins. 2007. Effect of resistance to the soybean cyst nematode on soybean sudden death syndrome development and Heterodera glycines reproduction. Phytopathology 97:S40.
- Avila, C. A., James McD. Stewart, and Robert T. Robbins. 2007. Gene Expression Changes in Gossypium arboreum as Response to Reniform Nematode Infection by Subtractive Hybridization cDNA-AFLP. Proceedings of the Beltwide Cotton Conferences, New Orleans. P232.
- Chen, P., C. H. Sneller, J. C. Rupe, R. D. Riggs, and R. T. Robbins. 2006. Registration of UA 4805 soybean. Crop Science 46:974.
- Decraemer, Wilfrida and R. T. Robbins. 2007. The Who, What and Where of Longidoridae and Trichodoridae. Journal of Nematology 39:In Press.
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Progress 01/01/06 to 12/31/06
Outputs
Eight lines of the 198 in the Arkansas Soybean Variety program were not significantly different than Forrest. This indicates they were not different in supporting reproduction from Forrest. Three lines were not different than either Anand or Hartwig. A total of 19 lines in the test of the Arkansas, Clemson, USDA Jackson TN, and Missouri breeding lines were not significantly different than Forrest in supporting reniform nematode reproduction, 5 than Hartwig, and 7 than Anand. Of the 19 identified lines one was from Arkansas, 12 were from Clemson, one was from Missouri, and three were from USDA Jackson TN. The objectives of these studies were 1) to identify new soybean cultivars that are poor hosts for the reniform nematode that would be useful in rotation with cotton or other reniform nematode susceptible crops in reniform nematode infested fields and 2) to identify useful breeding lines for use in selection of new reniform resistant cultivars. Two new species, one of
Longidorus, the other of Xiphinema were identified and descriptions are in progress.
Impacts
The cultivars with low reniform nematode reproductive indices are useful as a rotation crop with cotton in the southeast cotton production area. The information is shared as it becomes available with Extension nematologists in all southern cotton producing states. The new nematodes were from citrus in California and yellow poplar in the Great Smokey's of Tennessee.
Publications
- Robbins, R. T., L. Rakes, L. E. Jackson, E. E. Gbur, D. G. Dombek, P. Chen, E. Shipe and G. Shannon. 2006. Reniform nematode reproduction on soybean cultivars and breeding lines in 2005 tests. Proceedings of the Beltwide Cotton Conferences, San Antonio, 46-59.
- Avila, C. A., J. McD. Stewart, and R. T. Robbins. 2006. Introgression of reniform nematode resistance into upland cotton. Proceedings of the Beltwide Cotton Conferences, San Antonio, P. 154.
- Robbins, R. T., A review of reniform nematode resistance on soybean. 2006. Proceedings of the Southern Soybean Disease Workers. P. 19.
- Bae, Chang-Hwan, A. L. Szalanski, and R. T. Robbins. 2006. Intraspecific ITS1 polymorphism in the Columbia lance nematode Hoplolaimus columbus. Journal of Nematology 38:259-260.
- Robbins, R. T., 2006. A preliminary examination of two undescribed longidorids from the USA Journal of Nematology 38:289.
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Progress 01/01/05 to 12/31/05
Outputs
1. NON-TECHNICAL SUMMARY: To survey and identify plant parasitic nematodes, to seek reniform nematode resistance in cotton, and to determine nematode distributions, thresholds, and relationships. OBJECTIVES: Determine the effect of crop cultivars on the population dynamics of selected plant nematodes, find, identify, and incorporate nematode resistance into selected Arkansas crops, conduct surveys of selected crops for plant nematodes, determine taxonomic and morphological relationships of plant nematode species, and develop predictive modeling systems for nematode damage in the field. APPROACH: Testing of cotton cultivars and lines for Rotylenchulus reniformis resistance will be continued. Surveys of selected plant nematodes will be conducted. Classical and biotechnological taxonomic and morphological studies will be conducted on selected nematodes. Identification and enumeration of plant nematode species in cooperative research and survey study samples will be used
in determining plant nematode distribution and damage thresholds. PROGRESS: 2005/01 TO 2005/12 Reproduction of the reniform nematode on 209 soybean cultivars and lines and 52 breeding lines was tested in the greenhouse in 2005. Two of the lines did not have significantly more reproduction than the resistant Hartwig. Fourteen breeding lines did not have significantly more reproduction Anand. Forrest gave erratic results in all tests and was not used to determine reproductive indices. The objective of these tests was to identify soybean cultivars and breeding with low reniform nematode reproductive indices. One new species of the nematode Longidorus was described. This genus has several species that vector very serious viruses. Two Longidorus papers using morphometrics, statistical, and molecular methodology to separate species were published. Glycoproteins in the gelatinous matrix of rotylenchulus reniformis were reported as was Intraspecific variability of Rotylenchulus reniformis
from cotton-growing regions in the united states.
Impacts
2005/01 TO 2005/12 The cultivars with low reniform nematode reproductive indices are useful as a rotation crop with cotton in the southeast cotton production area. The information is shared as it becomes available with Extension nematologists in all southern cotton producing states. The newly described Longidorus species was from a pine nursery showing damage due to the nematode.
Publications
- AGUDELO, PAULA, R. T. ROBBINS, J. M. STEWART, AND J. B. MURPHY. 2004. GLYCOPROTEINS IN THE GELATINOUS MATRIX OF ROTYLENCHULUS RENIFORMIS. NEMATROPICA 34:229-234.
- AGUDELO, P., R. T. ROBBINS, J. MCD. STEWART, AND A. L.SZALANSKI. 2005. INTRASPECIFIC VARIABILITY OF ROTYLENCHULUS RENIFORMIS FROM COTTON-GROWING REGIONS IN THE UNITED STATES. JOURNAL OF NEMATOLOGY 37:105-114.
- BOUTSIKA, K., V. C. BLOK, M. S. PHILLIPS, S. A. LEWIS, R. T. ROBBINS, L. C. C. B. FERRAZ, D. G. F. BROWN. 2004. CONFIRMATION OF THE SYNONOMY OF PARATRICHODORUS CHRISTIEI (ALLEN, 1957) SIDDIQI, 1974 WITH P. MONOR (COLBRAN, 1956) SIDDIQI, 1974 (NEMATODA: TRIPLONCHIDA) BASED ON SEQUENCE DATA OBTAINED FOR THE RIBOSOMAL DNA 18S GENE. NEMATOLOGY 6:145-151.
- HANDOO, Z. A., L. K. CARTA, A. M. SKANTAR, W. YE, R. T. ROBBINS, S. A. FRAEDRICH AND M. M. CRAM. 2005. MORPHOLOGICAL AND MOLECULAR CHARACTERIZATION OF LONGIDORUS AMERICANUM N. SP. (NEMATODA: LONGIDORIDAE), A NEEDLE NEMATODE PARASITIZING PINE IN GEORGIA. JOURNAL OF NEMATOLOGY 37:94-104.
- ROBBINS, R. T., P. CHEN, L. RAKES, L. E. JACKSON, E. E. GBUR,D. G. DOMBEK, AND E. SHIPE. 2005. RENIFORM NEMATODE REPRODUCTION ON SOYBEAN CULTIVARS IN TESTS CONDUCTED IN 2004. PROCEEDINGS OF THE BELTWIDE COTTON CONFERENCES, NEW ORLEANS, 137-145.
- YE, WEIMIN, AND R. T. ROBBINS. 2004. STEPWISE AND CANONICAL DISCRIMINANT ANALYSIS OF LONGIDORUS SPECIES (NEMATODA: LONGIDORIDAE) FROM ARKANSAS. JOURNAL OF NEMATOLOGY 36:449-456.
- YE, WEIMIN, AND R. T. ROBBINS. 2005. MORPHOLOGICAL OBSERVATIONS ON LONGIDORUS CRASSUS THORNE, 1974 (NNEMATODA: LONGIDORIDAE) AND ITS INTRASPECIFIC VARIATION. JOURNAL OF NEMATOLOGY 37:83-93.
- AVILA, C. A., J. MCD. STEWART, AND R. T. ROBBINS. 2005. TRANSFER OF RENIFORM RESISTANCE FROM DIPLOID COTTON SPECIES TO TETRAPLOID CULTIVATED COTTON. PROCEEDINGS OF THE BELTWIDE COTTON CONFERENCES, NEW ORLEANS, 182. ABSTRACT.
- BAE, C. H., SZALANSKI, A. L., AND ROBBINS, R. T. 2005. MOLECULAR GENETIC ANALYSIS OF THE LANCE NEMATODE HOPLOLAIMUS (TYLENCHIDA: HOPLOLAIMINAE). JOURNAL OF NEMATOLOGY 37:356. ABSTRACT.
- BAE, C. H., SZALANSKI, A. L., AND ROBBINS, R. T. 2005.MOLECULAR PHYLOGENETIC ANALYSIS OF HOPLOLAIMINAE (NEMATODA: HOPLOLAIMIDAE). JOURNAL OF NEMATOLOGY 37:356. ABSTRACT.
- R. T. ROBBINS, E. SHIPE, P. CHEN, L. RAKES, L. E. JACKSON, E. E. GBUR, D. G. DOMBEK. 2005. RENIFORM NEMATODE REPRODUCTION ON SOYBEAN CULTIVARS IN TESTS CONDUCTED IN 2004. ABSTRACTS OF THE BELTWIDE COTTON CONFERENCES, NEW ORLEANS, LA. ABSTRACT.
- ROBBINS, R. T., SHIPE, E., CHEN, P., RAKES, L., JACKSON, L. E., GBUR, E. E., AND DOMBEK, D. G. 2005. REPRODUCTION OF RENIFORM NEMATODE ON SOYBEAN CULTIVARS IN 2004 TESTS. JOURNAL OF NEMATOLOGY 37:390-391. ABSTRACT
- YE, W., GIBLIN-DAVIS, R., AND R. T. ROBBINS. 2005. MOLECULAR MARKERS FOR SPECIES DIAGNOSIS AND PHYLOGENY OF LONGIDORUS AND XIPHINEMA (NEMATODA: LONGIDORIDAE. PHYTOPATHOLOGY 95: JUNE SUPPLEMENT S141. ABSTRACT
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