作者通过田间调查和室内接种观察,22种早春寄主上的蚜虫经鉴定有16个种,其中5个优势种。在棉苗上强迫接种均能生存,但只有14种寄主上的蚜虫能在棉苗上繁殖后代。四川早春气温回升快,蚜虫和蚜茧蜂均出现早。棉田周围5种早春寄主上的蚜茧蜂强迫接种能寄生棉蚜。油菜、大白菜上蚜茧蜂寄生棉蚜的寄生率高达80％以上,说明早春寄主上的蚜茧蜂与大田宿主有相互转移关系。 Through the field investigation and indoor inoculation observation, the authors identified 16 species of aphids on the hosts in early spring, including 5 dominant species. Forced inoculation on cotton seedlings can survive, but only 14 kinds of host aphids can propagate offspring on cotton seedlings. Sichuan early spring temperatures picked up quickly, aphids and aphids were appeared earlier. Five species of early spring host on the cotton fields were forced to inoculate cotton aphids on aphids. The parasitism rate of aphid parasitized by aphids on aphid and Chinese cabbage was as high as 80%, indicating that there was a mutual transfer relationship between aphid parasitoids and host in the early spring.