Abstract
Resistance of the hawthorn spider mite to organophosphorus acaricides in apple orchards of Azerbaijan.
Abstract
Studies carried out between 1968 and 1975 in apple orchards in Azerbaijan, USSR, showed that the regular use of organophosphorus insecticides resulted in an increase in resistance of Tetranychus viennensis Zacher to these compounds. Further studies carried out between 1973 and 1976 with the aim of improving control measures against the pest indicated that the use of specific acaricides such as chlordimeform (Galecron), Milbex [a mixture of chlorfenethol and chlorfensulphide] and dinobuton (Acrex) at 0.2% in rotation with dimethoate (Rogor) every 4 years reduced the level of resistance to dimethoate from 357 to 44.2 times that of a susceptible population.
