Field experiments were carried out during the cotton seasons of 2103 and 2014 in a private farm at Abo-Homos District, El-Behaira Governorate to evaluate the efficiency of the release of the parasitoid Trichogramma evanescens alone orin different combinations with different insecticides on the mean numbers of the cotton spiny bollworm (Earias insulana) (Boisd) larvae, in addition to their effect on seed cotton yield and economic loss.The obtained results indicated that the treatmental combination of the parasitoid T. evanescens+ Radiant^® gave the lowest infestation level (1.22 larvae/75 bolls) as compared with the untreated check (17.61 larvae/75 bolls) during the cotton season of 2013. Meanwhile, T. evanescens+ Pleo^® gave the highest seed cotton yield (8.98 ken / fed.), versus the lower one of the untreated check (4.31 ken / fed.). Also, the treatmental combination of T. evanescens+ Fertilizer (Novatic slop 48^®) + different insecticides (Oshin^®, Nomolt^® and Pestban^®) gave the lowest loss of cotton bolls (10.00%) and more or less higher  cotton yield and loss of bolls in comparison to the untreated check (4.31ken / fed. and 49.20%, respectively) during the same cotton season of 2013.
 During the cotton season of 2014, the performed combination of Trichogramma evanescens+ Fertilizer + consequential insecticides (Oshin^®, Nomolt^®and Radiant^®) gave the lowest larval infestation (0.50 larvae/75 bolls ) as compared with the untreated check (17.33 larvae/ 75 bolls). By the end of 2014 cotton season, the treatment of T. evanescens + (Pleo^®, Challenger^® and Pleo^®) gave the highest seed cotton yield of 9.43 ken / fed.  and the lowest loss of cotton bolls (6.50%) in comparison  to the untreated check (4.14 ken and 48.50%, respectively ). It could be concluded that all the performed treatments of the release of T. evanescens in combinations with the tested insecticides showed the best integration for bollworms control and recorded higher yield and lower loss value than those of the untreated check.