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.
