Population dynamics of predatory mite, Amblyseius longispinosus Evens on Tomato in polyhouse

The tomato was infested with two species of phytophagous mites i.e. Tetranychus urticae and Aceria lycopersici. The predatory mite population showed two peaks during the crop season. The first peak was observed during 13^th SMW while the second peak was observed during 25 SMW. The predatory mite, A. longispinosus population showed a significant positive correlation with the egg and mobile stages of T. urticae and A. lycopersici (r = 0.515, 0.401, 0.758 & 0.563, respectively). The predatory mite had also significant positive correlation with average temperature (r=0.799) and average relative humidity (r=0.727) of the polyhouse on tomato. Further, the maximum predatory mite, A. longispinosus population was recorded on top leaves of tomato followed by middle and bottom.