ارزيابي ميزان تاثير كونفيدور (ايميداكلوپريد) و تركيبات بيولوژيك نيودور و كاستوم بي سي - 3 در كاهش جمعيت لاروهاي سوسك برگخوار سيب زميني

Effect of Confider (Imidacloprid), Novodor and Custom BC-3 on Colorado Potato Beetle (Col.:Chrysomelidae) larvae

The potato Colorado beetle, Leptinotarsa decemlineata Say., is one of the most important pests of potato in the world. This pest especially in larval stage causes serious damages by foliar injury. The effect of Confidor (Imidacloprid) in two recommended dosages. Custom BC-3, Novodor and Phuzalone on the Colorado potato beetle larvae was determined I through 15 days after pesticide application during 2000-2001 in Ardabil. Custom BC-3 and Novodor were the commercial products of Bacillus thuringiensis subsp. tenebrionis. Fozalon was selected because it is used as a conventional insecticide in potato fields in Ardabil. Sun-Shepard method was used to determine the effects of the insecticides. For this purpose the number of survival larvae I day before and 1, 2, 5, 10 and 15 days after insecticides application was counted. After analysis of variance, Duncans multiple rang test for mean comparison of the treatments was done. Results showed that in both years and in most of the day-intervals after spraying, Confider (Imidacloprid) and Fuzalon were more effective than the others.