EFFICACY OF CERTAIN PLANT EXTRACTS AND TRI-FLUMURON ON BIOLOGICAL ACTIVITY OF Spodoptera lit-toralis (BOISD.) AND Earias insulana (BOISD.)AND ITS EFFCET ON COTTON YIELD

Results indicated variation effects of some plant extracts (Demsisa, Lantana, Neemazal and Golden shower), IGR belonging to acylureas (Triflumuron) and its mixture with Neemazal on some biological parameters of Spodoptera littorals and Earias insulana such as percentage of pupation and adult emergence, larval and pupal duration, larval and pupal weight, yield and yield loss. These compounds also showed some effects on S. littoralis when fed on sprayed cotton leaves in Beni- Sueif and Minia Governorates.