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Abstract -Cotton is the major economic crop in A.R.E. This crop is subjected to attack by several insect pests during the growing season. Some of these insect pests are very serious such as the cotton bollworms; the pink bollworm, Pectinophora gossypiella (Saund.) and the spiny bollworm, Earias insulana (Boisd.). Thus, the present study was carried out at the Faculty of Agriculture, Kafr El-Sheikh, Tanta University during seasons 1983-1987 for the following objectives: |