Development, Survival and Reproduction of Three Coccinellids Feeding on Hyalopterus pruni (Geoffer) (Homoptera: Aphididae)

Authors : Remzi ATLIHAN, M. Bora KAYDAN

Pages : 119-124

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Publication Date : 2002-06-01

Article Type : Research Paper

Abstract :The development, survival and fecundity of three aphidophagus coccinellid species, Scymnus apetzi insert ignore into journalissuearticles values(Mulsant);, Scymnus subvillosus insert ignore into journalissuearticles values(Goeze); and Exochomus nigromaculatus insert ignore into journalissuearticles values(Goeze);, were studied under laboratory conditions insert ignore into journalissuearticles values(25 ± 1, 65 ± 5% RH and 16 L/8D);. Development time from egg to adult was 20.4, 17.1 and 16.7 days for S. apetzi, S. subvillosus and E. nigromaculatus, respectively. Mortality rate from egg to adulthood was highest for S. apetzi insert ignore into journalissuearticles values(37.9%); followed by S. subvillosus insert ignore into journalissuearticles values(36.3%); and E. nigromaculatus insert ignore into journalissuearticles values(25.7%);. Duration of the oviposition period was 58.6, 64.9 and 75.3 days, and the total number of eggs per female was 492.8, 224.9 and 428.5 for S. apetzi, S. subvillosus and E. nigromaculatus, respectively. According to the life table parameters, net reproduction rate per female insert ignore into journalissuearticles values(R0);, the intrins rate of increase insert ignore into journalissuearticles values(rm);, and mean generation time insert ignore into journalissuearticles values(T0); were 137.5, 0,121 and 40.7 for S. apetzi; 69.9, 0.110 and 38.3 for S. subvillosus, and 157.2, 0.134 and 37.7 for E. nigromaculatus. The results obtained here provide information about the biology of three coccinellids that might be useful for the utilization of these predators in IPM programs against H. pruni.
Keywords : Scymnus apetzi, Scymnus subvillosus, Exochomus nigromaculatus