A study on lethality effect of Kane mite® and Oberon speed® on Tetranychus urticae and its predators Amblyseius swirskii and Phytoseiulus persimilis in laboratory conditions

Two-spotted spider mite, Tetranychus urticae Koch, is a serious pest for many agricultural crops. Use of effective pesticides and release of biological control agents are common methods in integrated pest management programs. In the present research, effect of different concentrations of Ebron Speed® and Kane Mite® on mortality of two-spotted spider mite and number of predatory mites Phytoseiulus persimilis and Amblyseius swirskii were investigated in laboratory conditions. LC50 values of Ebron speed® and Kane Mite® were calculated for egg stage of this pest as 252.47 and 1564.10 ppm, and for protonymph stage, as 207.17 and 1120.00 ppm, respectively. Therefore, results of this study showed that egg is more resistant stage than protonymph stage. Time required for 50% lethality (LT50) of Ebron Speed® and Kane Mite® on protonymph stage as 22.984 and 25.097 hours were calculated, respectively. The highest amount of feeding on eggs and protonymph stages infected with acaricides after 48 hours from time of spraying in predator mite P. persimilis was observed. According to results, use of Ebron Speed® and release of P. persimilis predator after 48 hours are recommended in the integrated pest management programs of this pest.