Progress 07/19/05 to 09/30/06
Outputs
Progress Report 4d Progress report. This report serves to document research conducted under a grant agreement between ARS and Oregon State University. Additional details of research can be found in the report for the parent project 5358-22000-032-00D, Development of Biologically-Based Strategies for Managing Insect Pests of Horticultural Crops. Dr. Robin Rosetta and collaborators conducted the following research towards the agreement: PROJECT OBJECTIVES: The goal of this project is to evaluate the efficacy of entomopathogenic nematodes and fungi in the management of rose midge, Dasineura rhodophaga. METHODS AND DESIGN OVERVIEW AND TIME LINES: 2005 - Our study at the North Willamette Research and Extension Center consisted of 88 Peace roses transplanted from the International Rose Garden (IRTG) where they had been planted in 2004 to initiate infestation of these roses. The trial was conducted in within screened enclosures to reduce midge escape and distribution to
non-infested sites. A randomized complete block design consisted of five treatments: 1) untreated control; 2) Diazinon WP - 4 lb/a applied on 2/17/05; 3) Merit 2 - 6 ml/foot/shrub applied 2/17/05; 4) Steinernema feltiae - 30,000 IJs/pot applied on 4/6/05; 5) Metarhizium aniopliae - 1 x 106 CFU/gram dry weight soil applied on 4/6/05. Treatments were applied with a CO2 pressurized backpack sprayer (Spray Systems) once activity of the midge has been found throughout the study plots. A quantitative assessment of damage occurred based on weekly sampling of three new inflorescences per rose plant (3 reps/plot) beginning July 15, 2005. Sampling ended when populations of midges had shown evidence of escape and this trial was discontinued. 2006 - The study was repeated in 2006. The diazinon treatment was eliminated due to limited number of infested roses. The Merit treatment was applied on 3/28/06 and the two biological control treatments were applied on 5/6/06. RESULTS SUMMARY: 2005 - The
trial was discontinued shortly after sampling began in July as midge escape from the cages was evident and no re-infestation was documented. 2006 - The midge activity at NWREC was hampered by a late frost coinciding with first midge emergence. This event delayed midge activity until late July of 2006. Until that time there was no detected midge larvae in new growth and extremely limited damage that might be attributed to midge but cannot be confirmed. Sampling is on-going and will continue through the end of September if midge pressure increases enough to present usable data for analysis. Additional roses have been planted at IRTG to become infested and available for continued data gathering on the biological control efficacy.
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Progress 10/01/04 to 09/30/05
Outputs
4d Progress report. This report serves to document research conducted under a grant agreement between ARS and Oregon State University. Additional details of research can be found in the report for the parent project 5358-22000-032-00D Development of Biologically-Based Strategies for Managing Insect Pests of Horticultural Crops. Funding for this project was just awarded. R. Rosetta and colleagues have begun working towards the outlined objectives of the project.
Impacts
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