اثرات كشنده و زيركشنده آفت‌كش‌هاي ايندوكساكارب، فلوبن‌دي‌آميد و لوفنورون روي پارامترهاي جدول زندگي سن شكارگر Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae)

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The predator bug Nesidiocoris tenuis (Hem.: Miridae) attacked to hosts at different stages of life from egg to adult .It is important because the nymphs and adults feeding on the wide range of pest. In this study sublethal effects of indoxacarb, lufenorun and flubendimide were evaluated on second instar larvae Diamondback moth of and the fifth instar nymphs of N. tenuis on the biology and life table parameters. The experiments were carried out in a growth chamber at 25 ± 2 oC, 60 ± 5% RH, and photoperiod 16:8 L: D. The result showed that the second instar larvae of Plutalla xylostella (Lep.: Plutella) in the 24 hours after treated by indoxacarb with the most LC50 (LC50 =678.92), has the lowest toxicity and lufenorun with the lowest LC50 (LC50 =297.41), has the highest toxicity. flubendiamide on the fifth instar nymphs of predator with LC50 (LC50 =4550.20), has less toxicity than two other pesticides. The effects of sublethal on the biology and life table parameters showed there was a significant difference between the means of egg incubation, adult, third and fourth instar nymphs for indoxacarb, lufenorun and flubendiamide treatments compared to control, also between the mean of the duration of the first and second instar nymphs treated with the indoxacarb and flubendiamid compared to the control there was a significant difference (p<)0.005)) and there was no significant difference between lufenorun and control. The difference between the mean of duration of fifth instar nymphs for flubendiamide treatment compared to control was not significant. The results showed that the average number of eggs laid by each female in the treatment of inodexacarb 16.38±0.42 was the lowest than lufenorun treatment, 11.67±.030, flubendiamide 22.23±0.25 and control 43.54±0.27 and indoxacarb had an important role in reducing the number of eggs laid by each female individual. The rate of natural increase (r) was found in the treatments of indoxacarb, lufenorun, flubendiamide and control, respectively, 0.46±0.01, 0.44±0.00, 0.06±0.00 and 0.84±0.00 (female/female/day), according to these results, the rate of natural increase significantly reduced by flubendiamide. Net reproductive rate (R0) for each treatments, indoxacarb, lufenorun, flubendiamide and control were 4.93±0.18, 40.48±0.18, 7.70±0.17 and 13.83±0.32 (female/female), respectively. Analysis of variance showed that there was a significant difference between all treatments at 95% confidence interval p<)0.005).

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