Evidence for Decreasing <i>Helicoverpa zea</i> Susceptibility to Pyrethroid Insecticides in the Midwestern United States

Fig. 4. Percentage survival of H. zea adults for Illinois, Minnesota, and Wisconsin from 2003-2005, based on adult vial tests (AVT) with cypermethrin (10 µg/vial).



Image from Plant Health Progress article:
Evidence for Decreasing Helicoverpa zea Susceptibility to Pyrethroid Insecticides in the Midwestern United States