EFFECT OF DIFFERENT PREY SPECIES ON BIOLOGY

S. Hamad, B.; J.AL-Shammary, A.; A.Okaily, R.; G. Abed, A.; S. B. Yousif, G.

	EFFECT OF DIFFERENT PREY SPECIES ON BIOLOGY
The Iraqi Journal of Agricultural Science
Article 1, Volume 43, Issue 0, 2013, Pages 66-70
Authors
B. S. Hamad; A. J.AL-Shammary; R. A.Okaily; A. G. Abed; G. S. B. Yousif
Abstract
The study was conducted to investigate the effect of two different prey ( green peach aphid Myzus persicae (Sulzer) and eggs of Ephestia spp ) on biological aspect of the predator Chrysoperla carnea (Stephen).The results indicated that the incubation period of eggs were 3.33 days and 3.1 days for C.cranea feeding on eggs of moth and green peach aphid respectively. The larval period was different by different host, duration of first larval instar was 1.97 days, the second instar was 3.39 days, the third instar was 3.10 days and the complete larval development period was 8.46 days on eggs moth, while they were 2.5 days, 2.75 days, 3.0 days and 8.25 days on aphids. The larval survival percentage was 88.1% and 90.2% respectively. The pupal period was 6.92 days on eggs of moth and 6.0 days on aphids, while the emergence was 87.4% and 94.7% respectively. There was significant pre-oviposition period (2.9days) when fed on aphids in comparison with 4.13 days on eggs of moth. The average longest oviposition period of female was 32 days recorded on aphids and 30.6 days. Feeding of different hosts to larvae of C.carnea significantly affected its fecundity higher fecundity (552 eggs/female) was recorded when fed on aphids ,while it was 320.86 eggs/female on eggs of moth. The maximum longevity of males was 28.6 days on aphids, and the maximum longevity of female was43.57 days on the same host. Predation efficiency of larvae was 40.3 nymph for the first larval instar,70 nymph for second instar , 165 nymph for third insar and 275 nymph for the complete larval stage ,while they were 53.4,336, 993, and 1253 eggs of moth respectively.

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