The effect of some insecticides on Creontiades pallidusin cotton fields of Gorgan and Gonbad-e Qabus

In order to choose the most suitable pesticide against,Creontidades pallidus, an experiment was carried out in a Randomized Complete Block Design with three replications and six treatments inGolestan province in 2003 and 2004. Plot size was 8 by 7.2 meter (nine 80 meter long rows spaced 80 centimeters apart). At each sampling, 10 randomly-selected plants were shaken into the net.. At the peak of bug activity in cotton fields, the experiment was done, and one day before and 2,5,7,10 and 14 days after pesticides aplication, number of pests were counted.In two-year combined analysis, although,the effect of location by treatment interaction was significant for the traits, there were not any significant differences between locations. There was not any significant difference between pesticide for pest reduction rate at 2nd and 5th day after pesticides application, but treatment means for raw data was singinificantly different from the check.Based on two-year results, Danitol and Chess at Agricultural Research Station of Gonbad and Cotton Research Station of Hashem –Abad, respectivly had the highest effect on pest reduction(67.69 and 75.92 percent reduction, respectively). According to the conbined analysis of the data, Chess, Danitol, Metasystox, Admiral, Confidor were ranked first to five with 67.60, 63.21, 57.51, 54.13 and 34.51 percent reduction, respectively.