TOXICOLOGICAL STUDIES ON AN INSECT OF LEPIDOPTEROUS COTTON PESTS

SUMMARYThe present investigation aimed to study the toxicity of some plant extracts and flufenoxuron, an Insect Growth Regulator ”IGR” against the 2nd and 4th larval instars of S. littoralis. Based on LC50 values, the effective plant extracts and IGR were used fA) Toxicological and joint action studies:Evaluation of toxicity of some plant extracts and flufenoxuron ”IGR”:The acetonic crude plant extracts as well as their joint action and IGR (flufenoxuron) were tested against the 2nd and 4th larval instars of S. littoralis. The insecticidal screening showed that, the 2nd and 4th instars larvae were more susceptible to theB) Biological studies:C) Morphogenic abnormalities: