The present investigation was directed to study the seasonal abundance
and percent of reduction of the pink bollworm, Pectinophora gossypielfa in
TrichogrammB releasing zones in cotton fields during 2003 cotton season. Flight
activity studies using pheromone traps in the two locations (100 fed.Jlocation) far side
30 kilometers approximately at Katr EI-Sheikh district were evaluated. The release of
the egg parasitoid started on June 21st till September 2nd at about 10 days intervals
(eight waves of releases). The results revealed that the percent of reduction of pink
bollworm male moths in treatment units ranged from 33.6 % to 29 0/0, while that of
reduction in larval numbers in green bolls ranged from 38 % to 40 0/0.