Feeding behavior of Serangium japonicum (Coleoptera:Coccinellidae),a predator of Bemisia tabaci (Homoptera:Aleyrodidae)

Abstract

Abstract: Serangium japonicum is an important predator of whiteflies in China.In this study,the Bemisia tabaci attacking behavior of S.japonicum adults and larvae was observed by a videocassette recorder.The results showed that the predatory behavior of S.japonicum adults was characteristic with six events, i.e.,walking,feeding,clearing,resting,vibrating wings,and excreting.The starved larvae of S.japonicum was fond spending all times in feeding and walking on host eggs,with no time in resting or clearing throughout the process.The time included in feeding and walking was not significant different among different instars of S.japonicum.The handing time per egg decreased with S.japonicum larvae developed from instar I to Ⅳ,but differed little between instar Ⅲ and Ⅳ.The starved females of S.japonicum spent longer time on egg feeding,but less time on clearing,resting and walking than satiated females.The time for starved female to predate on B.tabaci nymphs and pupae increased as the host nymphs developed.

Key words: Serangium japonicum, Bemisia tabaci, Feeding behavior

CLC Number:

Q968.1

YAO Songlin, REN Shunxiang, HUANG Zhen . Feeding behavior of Serangium japonicum (Coleoptera:Coccinellidae),a predator of Bemisia tabaci (Homoptera:Aleyrodidae)[J]. Chinese Journal of Applied Ecology, 2005, 16(3): 509-513.

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