The effect of PB-Rope pheromone [(ZZ/ZE)-7, 11- hexadecadienyl acetate] and different conventional insecticidal treatments (Merlin, Fenval and Larvin) on bollworm and cotton yield properties in the variety Giza 70 was studied. Bollworms infestation was higher under insecticidal treatments; nearly twice as much as those under pheromone treatment. Pheromone treatment reduced the over wintering larvae of PBW than in case of different insecticidal treatments.
Seed cotton yield/feddan was significantly higher under pheromone treatment conditions than under insecticidal regime; no other significant differences in cotton yield properties were observed between the two same treatments.