Integration of chlorfenapyr into a management program for the German cockroach (Dictyoptera: Blattellidae)

摘要

Chlorfenapyr, a new active ingredient discovered by American Cyanamid Company was found to have excellent insecticidal activities against field populations of German cockroaches. Trap catch reduction in cockroach infested apartments treated with the suspended concentrate (SC) and wettable powder (WP) formulations of chlorfenapyr was between 52.4 and 80.5 percent and 64.6 and 82.3 percent, respectively, after 8 work of post-treatment sampling. The level of control recorded for these formulations was not significantly different compared to that of cypermethrin, (Demon~(R) emulsifiable concentrate (EC)), a commercially available cockroach control insecticide. Trap catch reduction was between 53.6 and 71.8 percent for Demon~(R) EC over the same period. In a laboratory bioassay designed to test the residual toxicity of the two formulations of chlorfenapyr for up to 180d post-treatment, the WP formulation was found to have significantly higher activities than the SC formulation against cockroaches exposed on treated surfaces. We recorded 100 percent mortality for cockroaches exposed on WP treated surfaces after 180d compared to 62.5 percent for cockroaches exposed on SC treated surfaces. Chlorfenapyr has been reported to be active on insects' respiratory system. The potential for its use in German cockroach resistance management program is discussed.