Effect of some pesticides and plant extracts on survival period and reproductive parameters of, Chrysoperla carnea (Stephens) (Neu. Chrysopidae)
Subject Areas : entomology and othea arthropodsM. K. Irannejad 1 , M. A. Samih 2
1 - Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr university of Rafsanjan
2 - Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr university of Rafsanjan
Keywords:
Abstract :
Fecundity rate of natural enemies changes by sublethal doses of pesticides. In this research side effects of two insecticides, hexaflumuron and pymetrozin and acaricide, spirodiclofen and four plant extracts; Calotropis procera (Willd.) R. Br. (Asclepiadaceae), poleigamander Teucrium polium (Labiatae), Fumaria parviflora Lam. (Fumariaceae) and Thymus vulgaris L. (Labiatae) were evaluated on survival rate and reproductive parameters of Chrysoperla carnea (Stephens) in controlled condition. For this purpose, 154 fresh eggs and 40 third instar larvae treated by dipping and tapical application method respectively. The life duration of the predator on eggs treated on T. vulgaris, F. parviflora, hexaflumuron, spirodiclofen, pymetrozin, T. polium, C. procera treatments and controlplots (water & Aceton) were 69, 78, 97, 98, 100, 104, 105, 106 days respectively. It showed that the T. vulgaris had the lowest and the C. procera had the highest survival period. Also the maximum survival period of adults belonged toC. procera treatment (83 day)and the minimum to T. vulgaris(47 days).The maximum fecundity of females was519.59 eggs in pymetrozinand the minimum was 231.10 eggs in T. vulgaris. Also the fertility rates were 6.15 and 2.93 egg/female/day for spirodiclofen and T. vulgaris respectively. Extracts of C. procera are the best choices for some IPM programs because of their relative immunity on C. carnea as a biological control agents.