Author : Salinas - Labe, Marita Domingo

Summary : The mites passed through the egg, larval, protonymphal and deutonymphal stages before reaching the adult stage. Average duration, in days, of the life stages for female and male T. urticae were: incubation period, 3.43+-0.11 and 3.63+-0.11; larva 1.70+-0.24 and 1.68+-0.09; protonymph, 1.63+-0.07 and 1.72+-0.12 and deutonymph, 1.83+-0.09 and 2.23+-0.29, respectively. Female completed development within an average of 8.60+-0.24, and the male, 9.22+-0.35 days. Adult males live longer than the females. Arrhenotokous parthenogenesis and bisexual means of reproduction were observed in T. urticae. On the average, pre-oviposition, oviposition and post-oviposition periods, in days, were; 1.06+-0.14,10.08+-0.72 and 3.70+-0.14, respectively. Fecundity ranged from 11-126 eggs. Hatchability of eggs ranged from 85.11-100%. Sex ratio was 2.13 female : 1 male. Duration of life stages, in days, for female and male O. biharensis, on the average were : incubation period, 4.97+-0.16 and 4.05+-0.22; larva, 2.35+-0.09 and 2.35+-0.22; protonymph, 1.88+-0.13 and 2.10+-0.13, and deutonymph, 1.94+-0.11 and 1.35+-1.20, respectively. Female completed development within an average of 11.14+-0.31 and male within 9.85+-0.37 days. Adult females live longer than males. Deuterotokous parthenogenesis and bisexual means of reproduction were observed in O. biharensis. On the average, pre-oviposition, oviposition, and post-oviposition periods, in days, were: 1.73+-0.19, 7.69+-0.58 and 1.80+-0.30, respectively. Fecundity ranged from 2-63 eggs. Hatchability of eggs ranged from 72-100%. Sex ratio was 3 females: 1 male. Average duration, in days, of the life stages of female P. lenis were: incubation period, 1.37+-0.07; larva, 0.89+-0.04; protonymph, 1.03+-0.05 deutonymph, 1.20+-0.08. Development was completed within an average of 4.50+-0.12 days. Mean adult longevity was 20.45+-1.50 days.