花期杭白菊植株引诱菊小长管蚜的嗅觉和视觉线索及应用OA北大核心CHSSCDCSTPCD

Chrysanthemum morifolium cultivar'Hangbaiju'topped chrysanthemum teas,originated from Tongxiang City of Zhejiang Province.The aphid Macrosiphoniella sanborni(Gillette)is a special pest of chrysanthemum plants that often pierces and sucks the blooming flowers or hides in the flowers,and can be easily harvested with the flowers and remained in the processed chrysanthemum tea products.When the chrysanthemum tea was brewed,the aphid corpses would emerge into tea soup,which caused the drinkers off their appetite.In order to reveal the reasons for the aphid to prefer chrysanthemum flowers,and develop the effective green control agents used in blooming duration against the aphid,we collected and identified thirty-six volatile compounds from the blooming chrysanthemum plants,of which seventeen major components were used as odor sources for behavioral assays on the aphid.The results showed that a-pinene,E-2-hexenal,(+)-4-carcne,Z-3-hexenyl acetate,cis-β-ocimene,and γ-terpinene or l-octen-3-yl-acetate at 10-4 g/mL in hexane significantly attracted the aphid adults.These seven solutions,each at dosage of 10-2 g/mL,in turn were mixed with a nepetalactone hexane solution at 10-4 g/mL at a volume ratio of 60∶10∶10∶2∶2∶20:2:1 as a complex aphid sexual attractant,which compared with patented prodcuct,an aphid attractant,on the efficacy to trap the aphid adults,with the former being better.In addition,the phototaxis behavioral trials in chrysanthemum fields showed that the trapping efficacy of chrysanthemum yellow sticky boards on the aphid was slightly excelled that of bud green sticky boards.During the process of trapping aphids at blooming stage,one chrysanthemum yellow sticky board was baited with one complex aphid sexual attractant lure to build into one trap,one trap hanged from one bamboo stick with its bottom side 1 cm above chrysanthemum plant top,and the stick was inserted into chrysanthemum row.The distance among traps was 7m x 8m apart from each other.The chrysanthemum yellow sticky boards each baited with a complex aphid sexual attractant lure caught a large number of the aphid adults in the chrysanthemum fields and their control effect on the aphid population was significantly superior to that of spraying imidacloprid.It was thought that the combination of the major volatiles from the chrysanthemum plants and sex pheromones emitted from female aphids(olfactory cue)with the yellow color(visual cue)of the chrysanthemum pistils and petals strongly attracted the aphids during the blooming period.Furthermore,the complex aphid sexual attractant-baited chrysanthemum yellow sticky traps could be used as an effective environmental sound measure to combat the aphid during the blooming period.