Abstract
Five cultivars of cotton i.e., „IR4-NIBGE‟, „IR5-NIBGE‟, „Bt-121‟, „Sitara-10M‟ and „Sitara-11M‟ were screened for resistance against insect pest complex and Cotton Leaf Curl Virus (CLCuV) incidence in the research area of Cotton Research Station, Multan. The result depicted that the most resistant variety against jassids was „IR4-NIBGE‟ and „Sitara11M‟ whereas „IR4-NIBGE‟ showed the maximum resistance against whitefly infestation. The least susceptible variety to the infestation of thrips was „Sitara-10M‟. The most susceptible variety to the prevalence of Red Cotton Bug (RCB) was „IR4- NIBGE‟. The genotype „Bt-121‟ showed the attack of spotted bollworm. The high population of Dusky Cotton Bug (DCB) was observed on „Bt-121‟ throughout the season. The incidence of virus percentage increased with the passage of time; however, the variety „IR5-NIBGE‟ exhibited maximum level of tolerance. Variety „Bt-121‟ gave the maximum yield i.e., 1852 kg per acre followed by „IR5-NIBGE‟, „Sitara-11M‟, „Sitara-10M, 1584, 1503, 1466 kg per acre respectively. Our results suggest that IR4-NIBGE and Sitara -11M are comparatively tolerant to jassids and whitefly which are the yield losing pest. So IR4-NIBGE and Sitara -11M varieties can be included in IPM programme for the management of these voracious pests.

Tauseef Khan Babar, Muhammad Hasnain, Muhammad Faisal Shahazad, Muhammad Saleem, Amjad Ali, Haider Karar. (2013) Performance Of Some Transgenic Cotton Cultivars Against Insect Pest Complex, Virus Incidence And Yield, , Volume-50, Issue-3.
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