长春地区杨叶甲生物学特性及对9种植物的嗅觉行为反应

Biological characteristics of Chrysomela populi in Changchun and olfactory behavioral responses of adults to nine plants

杨叶甲(Chrysomela populi)是东北地区杨柳科植物的重要害虫。为更好地开展绿色防控,研究了该虫生物学特性及对9种植物的嗅觉行为反应。结果表明,杨叶甲在长春地区1年发生1代,极少数个体在环境条件适宜时可完成2代。杨叶甲以成虫在枯枝落叶层或浅土层内越冬。越冬成虫最早于4月下旬开始陆续出土,并上树取食嫩芽,5月上旬开始产卵,下旬第1代卵陆续孵化,随后幼虫开始取食,6月上旬开始化蛹,中、下旬出现第1代成虫。利用Y形嗅觉仪测定发现未交配和已交配的杨叶甲雌成虫对种植物挥发物均有不同程度趋向性,对杨树和旱柳的选择差异达到显著水平,已交配的雄虫仅对旱柳挥发物味源有明显选择性。

Poplar leaf-beetle Chrysomela populi is a serious leaf-feeding pest on Salicaceae plants in northeastern China.Biological characteristics and olfactory behavioral responses of C.populi to nine kinds of plants（Populus sp.,Salix matsudana,Medicago sativa,Glycine max,Betula platyphylla,Fraxinus mandschurica,Syringa reticulata,Ulmus pumila and Zea mays） were studied for developing green control strategy.The results showed that the pest had one generation a year and overwintered as adults in litter or shallow soil,while a handful of individuals had two generations when the environmental condition was suitable.Overwintering generation adults climbed out of soil in late April earliest and fed on buds of Salicaceae plants.The adults began to lay eggs in early May,and first generation of eggs successively hatched in late May and larva started feeding.The larva pupated in early June and adults emerged in mid and late June.Olfactory behavioral responses of adult C.populi were tested by a Y-tube olfactometer.The results indicated that volatiles of poplar and willow acted as lures to female C.populi,whatever virgin or mated,compared with control check（p 0.05）.The volatiles of willow also acted as lures to male adult of C.populi mated（p0.05）.