Progress 09/01/99 to 08/31/04
Outputs
4. What were the most significant accomplishments this past year? This report serves to document research conducted under a specific cooperative agreement with M. Raupp, Department of Entomology, University of Maryland, for "Development of an Attracticide for the Colorado Potato Beetle"; additional details of research can be found in the report for the parent CRIS 1275-22000-191-00D, "Chemical Signals for Managing Insects". Development of an attracticide must take into consideration interactions among stimuli within the environment of the targeted pest. Behavior of Colorado potato beetles challenged by simultaneous olfactory and gustatory stimuli revealed behavioral conflicts and preferences between stimulus pairs. For example, females took more time and made more turns when confronted with a volatile plant attractant and sucrose compared to the plant attractant and a male extract. These and other results provide important information that may be applied to attract
beetles to an attracticide formulation and increase time spent by beetles in contact with it.
Impacts
(N/A)
Publications
- Dickens, J. C. Chemical vocabulary for the Colorado potato beetle. XXI International Congress of Entomology. 2000. Foz do Iguassu, Brazil. Abstract. #1721.
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Progress 10/01/02 to 09/30/03
Outputs
4. What were the most significant accomplishments this past year? This report serves to document research conducted under a specific cooperative agreement 1275-22000-191-01S with Dr. Michael Raupp, Department of Entomology, University of Maryland, for "Development of an Attracticide for the Colorado Potato Beetle"; additional details of research can be found in the report for the parent CRIS 1275-22000-191- 00D, "Chemical Signals for Managing Insects". Behavioral toxicology was determined for an attracticide of Colorado potato beetle (CPB) larvae and adults. Two- and three-component plant volatile blends attractive to the CPB were tested in formulations containing 6% permethrin insecticide. The attracticide formulation containing the three-component blend was more effective against males than was the formulation comprised of the two-component blend, while the two-component blend was not significantly different from the three-component blend for females. In another
study, electrophysiological recordings revealed that phytochemicals on the surface and within the foliage are detected by sensory neurons located within gustatory sensilla on the antennae, mouthparts, and legs. Analyses of electrical activity of these neurons revealed similar response patterns for male and female CPB to several feeding stimulants: potato foliage extract, GABA and sucrose. Only responses elicited by leptine I, a glycoalkaloid feeding deterrent found in Solanum species, differed between the sexes. Our previous results and those presented here demonstrate the importance of the male-produced aggregation pheromone and plant volatiles in host and mate location, and indicate the involvement of nonvolatile deterrents in the final stages of host selection behaviors such as feeding and oviposition.
Impacts
(N/A)
Publications
- Dickens, J. C. Chemical vocabulary for the Colorado potato beetle. XXI International Congress of Entomology. 2000. Foz do Iguassu, Brazil. Abstract. #1721.
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Progress 10/01/01 to 09/30/02
Outputs
4. What was your most significant accomplishment this past year? D. Progress Report: This report serves to document research conducted under a specific cooperative agreement with Dr. Michael Raupp, Department of Entomology, University of Maryland, for Development of an Attracticide for the Colorado Potato Beetle; additional details of research can be found in the report for the parent project 1275-22000-184-00D, The Colorado Potato Beetle: Biology, Behavior, and Nutrition. Laboratory behavioral studies showed interactions and hierarchies among taste stimuli, e.g. sucrose and gamma-aminobutyric acid, and odorous signals, e.g. the male-produced aggregation pheromone and plant attractants, in the CPB. Behavioral responses to the chemical signals depended upon the circumstances in which they were encountered. Knowledge of these interactions among sensory modalities is critical for development of chemical signals in CPB management.
Impacts
(N/A)
Publications
- Dickens, J. C. Chemical vocabulary for the Colorado potato beetle. XXI International Congress of Entomology. 2000. Foz do Iguassu, Brazil. Abstract. #1721.
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Progress 10/01/00 to 09/30/01
Outputs
1. What major problem or issue is being resolved and how are you resolving it?
2. How serious is the problem? Why does it matter?
3. How does it relate to the National Program(s) and National Component(s)?
4. What were the most significant accomplishments this past year?
D. Progress Report: This report serves to document research conducted under a specific cooperative agreement between ARS and the University of Maryland. Additional details of research can be found in the report for the parent CRIS 1275-22000-184-00D: THE COLORADO POTATO BEETLE: BIOLOGY, BEHAVIOR, AND NUTRITION. Receptor neurons were characterized for feeding stimulants, deterrents, and interspecific stimuli in taste organs in the Colorado potato beetle. Behavioral experiments established the potential usefulness of the characterized neurons in bioassays of novel compounds with potential behavioral activity such as feeding stimulants, deterrents, or pheromones. Once characterized, these compounds will then be used as components of an attracticide or in push-pull strategies for CPB control.
5. Describe the major accomplishments over the life of the project including their predicted or actual impact.
6. What do you expect to accomplish, year by year, over the next 3 years?
7. What science and/or technologies have been transferred and to whom? When is the science and/or technology likely to become available to the end user (industry, farmer, other scientists)? What are the constraints if known, to the adoption & durability of the technology product?
8. List your most important publications in the popular press (no abstracts) and presentations to non-scientific organizations and articles written about your work (NOTE: this does not replace your peer-reviewed publications which are listed below)
Impacts
(N/A)
Publications
- Dickens, J. C. Chemical vocabulary for the Colorado potato beetle. XXI International Congress of Entomology. 2000. Foz do Iguassu, Brazil. Abstract. #1721.
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Progress 10/01/99 to 09/30/00
Outputs
1. What major problem or issue is being resolved and how are you resolving it?
The Colorado potato beetle (CPB) is a major pest of potatoes; to prevent economic damage numerous pesticide treatments may be required for control. The CPB is well-known to develop resistance to pesticides and resistance has already been reported for imidacloprid, the most effective pesticide currently in use. CPB use chemical signals to locate their host plant (potatoes) and mates. Determination of a host plant or sex attractant would be of great use as such chemicals or blends of chemicals could be used to modify CPB behavior for census or control strategies. For example, a chemical attractant could be used in combination with a pesticide and feeding stimulant as an attracticide to regulate population levels and increase specificity of the control measure. Knowledge of specific chemicals used by CPB to locate its host plant could be used to genetically-engineer plants to make them less attractive to CPB or more attractive to biocontrol agents such as predators and parasitoids.
This project relates to in-house CRIS Project no. 1275-22000-137-00D.
2. How serious is the problem? Why does it matter?
3. How does it relate to the National Program(s) and National Component(s)?
4. What were the most significant accomplishments this past year?
5. Describe the major accomplishments over the life of the project including their predicted or actual impact.
6. What do you expect to accomplish, year by year, over the next 3 years?
7. What science and/or technologies have been transferred and to whom? When is the science and/or technology likely to become available to the end user (industry, farmer, other scientists)? What are the constraints if known, to the adoption & durability of the technology product?
8. List your most important publications in the popular press (no abstracts) and presentations to non-scientific organizations and articles written about your work (NOTE: this does not replace your peer-reviewed publications which are listed below)
Impacts
(N/A)
Publications
- Dickens, J. C. Chemical vocabulary for the Colorado potato beetle. XXI International Congress of Entomology. 2000. Foz do Iguassu, Brazil. Abstract. #1721.
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