CHANGES IN THE COLORADO POTATO BEETLE (LEPTINOTARSA DECEMLINEATA SAY) SUSCEPTIBILITY LEVEL TO PYRETHROIDS AND THE PEST RESISTANCE MECHANISMS TO DELTAMETHRIN

摘要

Monitoring of Colorado potato beetle (CPB) resistance to different insecticides has been conducted in Poland for years. This work presents the current status of the CPB susceptibility level to deltamethrin and beta-cyfluthrin, noting the important increase of pyrethroid toxicity towards the CPB, when compared with earlier data. The work also presents research on CPB resistance mechanisms to pyrethroids. The resistance research was conducted using different enzymes blockers: piperonyl butoxide, S,S,S-tributylphosphorotrithioate and diethyl malonate.