Japanese Beetles: Quantitative Determinations of Larval Resistance to Chlordane in Ohio134
- 1 April 1977
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 70 (2) , 209-210
- https://doi.org/10.1093/jee/70.2.209
Abstract
The magnitude of resistance to cyclodiene insecticides in 3rd stage larvae of Popiliia japonica Newman from 4 locations in Ohio were tested quantitatively for resistance to chlordane by using standard dosage-response procedures and statistical analyses. The resistance factor for 2 resistant strains compared with the susceptible strain chosen as the standard ranged from 10.2–15.5-fold at the LD50 level over the 6-week period. When dosage-mortality lines were computed for all 4 strains, true resistance and homogeneous populations were indicated by the steepness of the slopes. Thus, the time-mortality data indicated that the amount of chlordane required for LD50 or LD95 decreased with increased time of exposure.This publication has 0 references indexed in Scilit: