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Potato Psyllid (Hemiptera: Triozidae) Response to Insecticides Under Controlled Greenhouse Conditions.
E R Echegaray1,2, A C Vinchesi1,3, S I Rondon1
1Department of Crops and Soil Sciences, Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR, USA.
Journal of Economic Entomology
|December 29, 2016
Summary
New insecticides show promise for managing the potato psyllid, Bactericera cockerelli, a vector of Zebra Chip disease. Cyantraniliprole and spinetoram were effective against adults, while cyantraniliprole and oxamyl controlled nymphs.
Area of Science:
- Agricultural Entomology
- Plant Pathology
- Insecticide Resistance Management
Background:
- Bactericera cockerelli (Šulc) vectors Zebra Chip disease in potatoes, causing significant economic losses.
- Current management relies on insecticides like pyrethroids and neonicotinoids, increasing resistance risk.
- Novel insecticides with different modes of action are crucial for effective pest control.
Purpose of the Study:
- To evaluate the efficacy of conventional and new insecticides against Bactericera cockerelli adults and nymphs.
- To assess the immediate and residual activity of various insecticidal compounds.
- To determine the impact of soil-applied insecticides and specific compounds on psyllid reproduction.
Main Methods:
- Greenhouse trials were conducted to test the immediate and residual effects of insecticides on adult and nymph stages of Bactericera cockerelli.
- Soil applications of insecticides were assessed for residual toxicity at 7 and 14 days post-treatment.
- The effects of specific insecticides on psyllid reproduction were also evaluated.
Main Results:
- Cyantraniliprole (high rate) and spinetoram demonstrated superior immediate and residual activity against adult psyllids.
- Cyantraniliprole and oxamyl (both rates) were effective in controlling nymph populations.
- Soil applications of cyantraniliprole, oxamyl, and imidacloprid maintained toxicity to psyllids up to 14 days.
- Cyantraniliprole and tolfenpyrad negatively impacted psyllid reproduction.
Conclusions:
- Newer chemistries, including cyantraniliprole, spinetoram, oxamyl, imidacloprid, and tolfenpyrad, offer effective control options for Bactericera cockerelli.
- Incorporating these novel insecticides into rotation programs can help manage psyllid populations and mitigate resistance development.
- These findings provide valuable insights for integrated pest management strategies in solanaceous crops.
