الفهرس 
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Abstract
Bioactivity Of Certain Insect Growth Regulators On The American Bollworm Heliothis Arnigra (Hubn)
Nine insect growth regulators (IGRs)have been evaluated against the American bollworm H. armigera Hubn). Several treatments were carried out to eluidiate the bioactivity of the tested molecules and to check for initial and accumulative effects on the life span and reproduction.
The results could be summarized as follows :
1- egg treatments
2-larval treatment
3- pupal treatment
4- Adut stage