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Your Position :Home->Past Journals Catalog->2012年49 No.6

Current status of Brontispa longissima outbreaks and control
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Key Words: Brontispa longissima,invasion biology,chemical control,control,biological control,Metarhizium anisopliae,
Abstract:         Brontispa longissima (Gestro) has become an increasingly serious pest of coconuts throughout various growing  regions in the Pacific,especially over the last 3 decades. In 2002 there was an outbreak of B. longissima in Hainan, China. Chemicals,including the use of chemical sachets,has been recommended as a means of controlling this pest.There have been many attempts at biological control,for example Metarhizium anisopliae which was isolated from B.longissima and formulated as a bioinsecticide has been used in China and in other countries. The larval parasite Asecodes hispinarum and pupal parasite Tetrastichus brontispae were introduced to China in 2004 and have produced good results.Parasitisation by T. brontispae and A. hispinarum have reached 90% and 100% ,respectively. It is necessary to release  substantial numbers of parasites into suitable populations of B. longissima to ensure establishment. Environment and  climate can affect the survival and effectiveness of these parasitoids. Such information is necessary to improve control   measures. Directions for further research on B. longissima are outlined.
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