Laboratory Evaluation of Some Conventional Insecticides against American cockroaches (Periplaneta americana L.), in Jeddah Governorate

Periplaneta americana is an important medical pest. They have a critical role in the transmission of infectious pathogens and diseases either by mechanical or biological ways. This study was set out to provide an effective technique to evaluate the different classes of the insecticides. Two representative chemicals from each class were selected to compare the toxicity: Actellic 50EC and Safrotin MC from organophosphates, Cyptron 100EC and K-Othrine SC25 from pyrethroids. Feeding and contact toxicity bioassay methods were carried out for detecting insecticide susceptibility of adult and nymphs after 48h. Our results showed that nymphs were more sensitive than adults in all treatments by LC 50 and LC90 values, and contact toxicity is a strongly method to control different stages of P.americana. Among all classes, Actellic 50EC was the most effective insecticides. Based upon the present study, organophosphate have great potential for controlling different stages of P.americana.