Monitoring for Pyrethroid Resistance in Bollworm in Texas cotton. Helicoverpa zea.
Importance of Helicoverpa zea
- Highly polyphagous(known to feed on > 100plant spp) - Larvae are key pest of cotton (bollworm), corn (earworm), and grain sorghum (headworm) - Multivoltine species (5-7 generations per year in Texas) Pyrethroid Resistance Monitoring
Statewide cypermethrin resistance monitoring is conducted using the Adult Vial Test. We prepare multiple concentrations of cypermethrin in acetone which are used to coat vials with different amounts of cypermethrin, some of which are diagnostic Methods -Cypermethrin coated vials are shipped to collaborators across the state of Texas and Tamaulipas, Mexico -1 moth placed in each vial -Evaluation of mortality at 24 h -Data analysis with PoloPlus -Probit graphs in SigmaPlot
cotton bollworm resistance
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