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Determination Of The Most Important Biological Indicators Of The Predator Nephus Includens Kirch As Compared With Those Of The Famous Predator Cryptolaemus Montrouzieri Mulsant
Nadia Al-Khateeb(1) and Louai Asslan(2)
(1)Directorate of Agriculture And Agrarian Reform of Lattakia, Lattakia Center for Rearing Natural Enemies, P.O. Box 2012, Lattakia, Syria
E-mail: nadia@arabscientist.org
(2)Faculty of Agriculture, Damascus University, Damascus, Syria
E-mail: louai@arabscientist.org
Abstract
Cryptolaemus montouzieri Mulsant and the local predator Nephus includens were reared on the Planococcos citri Risso in Lattakia center for Rearing Natural Enemies. A comparative study on the important biological parameters (Predation rate, life cycle, longevity, starvation tolerance, fecundity, sex ratio, adult emergence) for both predators was carried out under laboratory conditions. Results indicated that the predation rate of C. montro- uzieri males and females, was three folds higher than that of N. includens. The perdition rate for the third instar of the first predator was three times higher than that of the second predator, with significantly differences reaching 10.53± 2.41, 30.87±3.76 nymphs (second nymphal instars)/day. The results showed an increase of 1.8 fold in the fecundity index of C. monrtouzieri females as compared to those of N. includens. Whereas, both predators has similar values for other biological parameters (biologic development stages, longevity for males and females, adults emergence, sex ratio).
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