Biology of carmine mite, (Tetranychus urticae koch) on brinjal leaf

Biological studies on carmine mite, Tetranych usurticae Koch on brinjal revealed that life cycle of T. urticae was completed by passing through four active stages, viz. larva, protonymph, deutonymph and adult as well as three quiescent (chrysalis) stages, viz. nymphochrysalis, deutochrysalis and teliochrysalis. After each active stage (except adult), mite entered into quiescent stage for short period, and the mite passed through next successive stage after moulting. The total fecundity of fertilized female was 59.50±5.06, and that of unfertilized was 22.40±0.94 eggs per female. The incubation, larval, protonymphal, and deutonymphal periods were 4.59±0.31, 1.81±0.10, 1.40±0.16 and 1.68±0.40 days, respectively, while the growth index of the mite was 6.65.