MANIPULATION OF THE SEVEN SPOTTED LADY BEETLE, COCCINELLA SEPTEMPUNCTATA (COLEOPTEFtA : COCCINELLIDAE) FOR CONTROLLING THE WOOLLY APPLE APHID, ERIOSOMA LANIGERUM(HOMOPTEFtA: APHIDIDAE)

Document Type : Original Article

Author

Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt

Abstract

The seven-spotted ladybird, Coccinella septempunctata L. (Coleoptera:Cocdnellidae) is an important predator of aphids play a good role in redudng the population density of Erasoma lanigerum attacking apple trees. C septempunctata was released (one time), at early April 2004 and repeated in 2005, at Qualubia Govemorate at rates of 30, 60 and 90 eggs/tree. During the first season (2004), the percent reduction of E lanlgerum increased gradually with elapse of time reaching the maximum in early Nov. The achieved average reductions in aphid population were 72.3, 87.3 and 95.5% in the end of November, respectively. The same trend of percent reduction of E anigerum was achieved in the second season (2005). The following percent reduction exhibited 77.1, 90.1 and 96.0% at release rate of 30, 60 and 90 eggs C .wptempunctata, respectively. From the above mentioned results, the seven-spotted ladybird, Coccinella septempunctata L. could be used successfully, as a biocontrol agents in the integrated program for controlling the woolly apple aphid, Erasoma lanigemm (Hausmann) on the apple trees, for minimizing the risk use of insecticides on public health and environment

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