Cotton is as important and strategic crops with serious problems of pests, so far any varieties has not introduced tolerant to pests. Cotton bollworm (Helicoverpa armigera) ,a major pest of cotton in Iran and world which cause economic damage to cotton crop. An experiment was conducted as randomized complete block with three replications and 13 hybrids(16-84,113,114-2,19-84,100,104,3-84,684,1084,102,108,106 and sahel variety) immobilized in each plot with 6 line including 8-meter by cropping pattern 80×20 on 2014-2015. .In order to investigation changes in different growth stages of the cotton bollworm samples were regularly collected weekly from 5 plants per plot and middle stages of the pest was also recorded in special tables. Composited analysis showed that treatments of, 114-2, 19-84 and 102had the highest yield at the rates of 918, 817 and 837kg/ha respectively in 5 % level. I view of hybrids treatments of 19-84, 104 and 3-84 had the highest earliness percentage at the rate of, 94.23, 92.42 and 91.36, respectively. The infection rate of bollworm treatments hybrids 6-84,102, 113 and 3-84 by 0.363, 0.363, 0.330 and 0.243, had the lowest density of plant pest infestation.