Cuticular hydrocarbons of the ectoparasitic wasp cephalonomia hyalinipennis(hymenoptera:bethylidae)and its alternative host,the stored product pest caulophilus oryzae(coleoptera:curculioidae)

摘要

Cuticular hydrocarbons of an ectoparasitic wasp attacking two beetls hosts have been identified and examind for the influence of age,gender,mating status,and host on hydrocrbon composition.The 37 wasp hydrocarbons identified consisted of a series of n-alkanes (C_(160 to C_(33)),3-,5-,9-,10-,11-,and 12-methyl alkanes and a series of Z-7 and Z-9 monoenes (C_(23:1) to C_(27:1)).One C_(25:2) diene was found.No effects of hydrocarbon composition as a function of age,gender,or mating status were found for the wasps.Wasps reared on Hypothenemus hampei,however,had 12/37 significant abundance differences to those reared on Caulophilus oryze,although all but one of these differences were for components in less than 2% relative abundance.The C_(25:2) diene from wasps reared on H.hampei was present in about 10% whereas from wasps reared on C.oryzae it was present in about 2%.The hydrocarbons of one host for this wasp,the coffee berry borer(Coleoptera:Scolytidane),have been previously reported [Howard and Infante,Ann.Entomol.Soc.Am.89:700-709(1996)].The hydrocarbons of the alternative host,C.oryzae (Colepotera:Curculionidae)consists of n-alkanes(C_(17) to C_(31),2-,4-,5-,7-,9-,11-,12-,13-,14-,and 15-methyl alkanes,and a series of dimethyl alkanes of the series 3,17-;5,11-5,17-;7,11-;7,13-,13,17-;and 15,19-.No unsaturated hydrocarbons were found.No signficant differences inhydrocarbon composition were found between male and female.X.oryzae.Hydrocarbonpatterns of four species of Cephalonomia are compared and shown to be species-specific.The data are discussed in terms of ecological and physiological parameters.