author(s)
Sandeepa AR, Pradeep S, Thara KT and Sridhara S

abstract
An investigation on the Biology of Tetranychus urticae Koch (Acarina: Tetranychidae) on carnation under laboratory condition was undertaken at College of Agriculture, University of Agricultural and Horticultural Sciences (UAHS), Navile, Shivamogga during 2015-16. Studies on the biology of T. urticae revealed that both the sexes passed through five stages viz., Egg, larva, protonymph, deutonymph and adult with a short resting period known as quiescent stage termed as nymphochrysalis, deutochrysalis and teleo chrysalis, respectively. Morphology of all the stages, period of immature stages, longevity of adults and reproductive potential of T. urticae were also studied.