EFFICIENCY OF TWO DIFFERENT ENTOMOPATHOGEN FUNGI BEAUVERIA BASSIANA AND PURPUREOCILLIUM LILACINUM TR1 AGAINST TETRANYCHUS URTICAE

Two-spotted red spider/red spider mite is an important pest of cultivated crops.Resistance is one of the most important problems in the intensive chemical control used in traditional management methods.Therefore, researchers have been using alternative control methods in pest management to overcome resistance problem.This study was conducted between 2015 and 2017 to investigate the effects of entomopathogenic fungi (EPF) Beauveria bassiana and Purpureocillium lilacinum TR1 on Tetranychus urticae (Koch) (Acarina: Tetranychidae).The doses used for P. lilacinum were 10 4 , 10 5 , 10 6 , 10 7 , 10 8 and 1.6 10 8 conidia ml -1 and for B. bassiana 10 4 , 10 5 , 10 6 , 10 7 , 10 8 , 10 9 and 3.7 × 10 9 conidia ml -1 .After five days the results showed that mortality of T. urticae adults were started with 10 5 conidia ml -1 concentration of B. bassiana and after seven days 10 4 conidia ml -1 concentration of P. lilacinus.At the end of the trial, the mortality rate recorded by the highest doses, 10 8 conidia/ml, of both EPFs were 28.3 and 66.6% with P. Lilacinus and B. bassiana.Since many EPF fungi are thought to be epizootic, B. bassiana and P. lilacinum can be effectively used against T. urticae control as biological agents.