EVALUATION OF THE EFFECTIVENESS OF SOME COMPOUNDS ON THE PINK AND SPINY BOLLWORMS IN COTTON FIELDS

Experiments were conducted in cotton fields in the village of bahr el-baker,sharkia governorate during 2011 and 2012 cotton seasons to study the effect ofindoxacarb 105ml, methomyl 300g and spinosad at rates 50,75 and 100 ml/feddan}on the pink and spiny bollworms. results showed that methomyl caused the highestreduction percentage on the pink bollworm 70.24%, followed by spinosad 100,75 and50ml with 57.01, 47.56 and 41.36%, respectively, during the two seasons. the leastreduction percentage was 31.69% in indoxacarb. the results, also indicated thatspinosad at rate 100 ml/ feddan caused the highest reduction percentage in the spinybollworm where it was 69.50%, followed by spinosad 75ml then methomyl andspinosad 50 ml where it was 58.99, 51.03 and 50.91%, respectively. indoxacarbrecorded the lowest reduction percentage 30.96%. methomyl caused highestreduction percentage for the pink and spiny bollworms where it was 66.04%, followedby spinosad 100,75 and 50 ml which recorded 61.95, 50.90 and 44.65%,respectively. indoxacarb recorded the lowest reduction percentage 25.61%.