Behavioral responses of Diaphorina citri Kuwayama to buds of two host plant species and their volatiles
Asian citrus psyllid Diaphorina citri Kuwayama is an important pest damaging the bud and tender shoot of citrus,and is also the vector of Citrus Huanglongbing.The volatile compounds of various buds from Murraya exotica L.and Citrus reticulate cv.Shatangju were extracted by headspace solid phase micro-extraction method,and analyzed by gas chromatography/mass spectrometry(GC/MS).The behavioral responses of adult Asian citrus psyllid to four common volatile components were measured by a four-arm olfactory instrument to explore the role of plant odor in host selection of D.citri.The results showed that:(1)36 and 41 volatile substances were detected in the unexpanded buds and semi-expanded buds of C.reticulate cv.Shatangju respectively,there were 32 and 37 volatile substances detected in the fully developed buds and new leaves,while 20 and 14 volatile substances were examined in the unexpanded buds and expanded buds of M.exotica respectively.(2)There were 8 common volatiles from buds of the two plants in the different developmental stages,which were Humulene,Hexanal,Caryophyllene,Trans 2-Hexenal,S-(E,E)-1-ethylidene-5-methylene-8-(1-methylethyl)-1,6-Cyclodecadiene,alpha-Cubebene,gamma-Carotene and 8-Cadinene respectively.(3)D.citri adults were attracted strongly to 1 μL/mL Humulene,10 μL/mL Caryophyllene and 100 μL/mL Trans 2-Hexenal,respectively,which could provide a basis on the attractants of Asian citrus psyllid.
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万方数据
