جستجوی مقالات مرتبط با کلیدواژه « مرحله » در نشریات گروه « گیاهپزشکی »

The predatory bug Nesidiocoris tenuis Reuter is one of the important natural enemies of the greenhouse whitefly, Trialeurodes vaporariorum Westwood. In this research, age-stage two-sex life table and predation rate of this predator by feeding on 2nd instar nymphs of T. vaporariorum were studied at 25±2 oC, 65±10% RH and a photoperiod of 16:8 h (L:D) on eggplant, cucumber and tomato plants. The means and SEs were estimated using 100,000 Bootstrap replications. Pre-adult developmental time of the predator on eggplant, cucumber and tomato were 23.94±0.12, 22.94±0.27 and 22.43±0.21days; female longevity were 21.2±0.49, 25±0.24 and 24.2±0.78 days, male longevity were 26.16±1.91, 28.92±1.46 and 29.25±1.43 days, and fecundity of the predator were estimated to be 84.36±3.17, 114.44±2.32 and 122.73±4.92 eggs, respectively. The intrinsic rate of increase (r) and net reproduction rate (R0) of the predator were 0.102±0.0052, 0.111±0.0054 and 0.117±0.0046 (d-1), and 30.13±4.94, 40.87±6.6 and 52.6±7.53 (eggs), respectively. The highest net predation rate (C0) of the predator was obtained on tomato (1803.59±135.9 whitefly nymphs/ predator) which was significantly higher than those estimated on two other host plants (1337.17±114.27 on cucumber and 1163.27±105.81 on eggplant). Difference in transformation rate from prey population to predator offspring (Qp) were not significant between three host plants and were estimated to be 34.29±3.12, 32.72±3.97 and 38.61±4.41 for tomato, cucumber and eggplant, respectively. Overall, in the current study, compared with two other host plants, tomato was more appropriate plant for developing and predatory activity of this predator.