Study of resurgence of Tetranychus urticae Koch against synthetic insecticides

Abstract

In recent year, spider mite, Tetranychus urticae Koch, has assumed a major pest status on okra, Abelmoschus esculentus L. Moench., during summer months. Therefore some conventional acaridae were evaluated against spider mite for studies of resurgence to determine the most effective. In this study, five pesticides were used at the recommended doses. These pesticides were observed at four different intervals: at 1, 3, 7 and 14 days. The results indicate that the performance of the Clofentazine, Cyflumetofen, Fenpyroximate and Propargite, are completely no resurgence. These chemical did not induced resurgence but Dicofol were showed relatively less effectiveness against the mite.