苜蓿盲蝽在豫东棉区的寄主选择及其转移规律

采用扫网、目测、盘拍和室内饲养方法,调查研究了河南东部棉区苜蓿盲蝽的野生寄主和栽培寄主植物种类,已发现161种,其中野生寄主植物137种,分属32个科,栽培寄主20种。研究了苜蓿盲蝽在这些寄主植物间的转移规律,表明该棉区以田菁、草木樨、野苜蓿为主的豆科植物及小白酒草为主的菊科等植物和小麦、棉花一起,构成了有利于苜蓿盲蝽发生的生态环境。抽穗期的小麦为越冬代成虫向棉田过渡的主要桥梁寄主,棉花仅仅是第1至第3代苜蓿盲蝽的侨居寄主,田菁、草木樨、小白酒草等豆科和菊科杂草丛生的地方是其第4代、第5代生存和越冬的主要场所。

ON THE SELECTIVITY AND DISPERSION OF ALFALFA PLANT BUG AMONG ITS HOST PLANTS IN EASTERN HENAN COTTON REGION

Methods of net sweeping, ocular estimation, plate-tapping and laboratory rearing were adopted for exploring the selectivity and dispersion of alfalfa plant bug Adelphocoris lineolatus Goeze among its host plants in Eastern Henan Cotton Region. The results showed that there are 161 plant species , including 137 species of wild plants, belong to 32 families, and 20 species of cultivated plants, in association with the feeding of this plant bug ,in which the leguminous plants, mainly sesbania, sweet clover and wild alfalfa, and Conyza canadensis belong to composite family, along with wheat and cotton have formed the favorable host composition for the occurrence of A. lineolatus. The earing wheat is the most important bridge host for the transition of post-overwintering adults from weeds to cotton field, while the cotton is only the host of residence of A. lineolatus during 1st - 3rd generation. The places overgrown with sesbania, sweet clover and Conyza canadensis are the main bases for the survival and overwintering of 4th and 5th generation of this plant bug.