SPREADING OF COLORADO POTATO BEETLE RESISTANCE TO CHEMICAL INSECTICIDES IN SIBERIA AND HISTORY OF ITS SETTLING IN THE SECONDARY AREA

Data obtained from toxicological analysis of sensitivity to insecticides in Colorado potato beetle Leptinotarsa decemlineata Say (Coleoptera, Chrysomelidae) in Novosibirsk region evidenced presence of multiresistance to organophosphorus compounds (OPC), neonicotinoids and nereistoxins. High level of sensibility to pyrethroids and phenylpyrazoles is a peculiarity of Novosibirsk population of Colorado beetle. These data as well as high phenotypical similarity of adults from Novosibirsk region and Kazakhstan suggest that population complex of Colorado beetle in Kazakhstan had formed from part of the “settling wave” which did not fall under wide-scale pyrethroids application in the middle zone of Russia in 1980th. Probably,further spreading of this part of Kazakhstan population northwards led to formationof new zones of species naturalization in Siberia.