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The biology of Tetranychus urticae Koch on lady's finger was undertaken at Laboratory, Department of Entomology, Chimanbhai Patel College of Agriculture (CPCA), Sardarkrushinagar, Dantiwada Agricultural University, Sardarkrushinagar, Gujarat, India during summer 2022. Mite, T. urticae has five life stages viz., egg, larva, protonymph, deutonymph and adult with three quiescent stages called as nymphochryasalis, deutochrysalis and teleiochrysalis. The incubation period of egg was 3.40±1.03 days. The respective period of larva, nymphochryasalis, protonymph, deutochrysalis, deutonymph, teleiochrysalis, total development and adult were: 1.73±0.78, 0.60±0.30, 2.53±0.68, 0.57±0.27, 2.13±0.73, 0.72±0.21, 8.76±1.40 and 11.93 ±1.08 days, respectively, in the case of male while they were 2.70±0.75, 0.64±0.21, 2.86±0.81, 0.70±0.29, 2.66±0.66, 0.85±0.26, 11.86±1.88 and 14.56±1.07 days, respectively, in case of female mite. Female of T. urticae occupied 2.86±0.81, 7.26±1.43 and 2.26±0.69 days as pre-oviposition, oviposition and post-oviposition period. Total life span of male and female were 21.76±2.38 and 26.46±2.20 days. [ABSTRACT FROM AUTHOR]