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为害紫云英的蚜虫主要是豆蚜(Aphisglycinesmats),在我地区每年可出现两次高峰期:冬前一次常发生在10月下旬以后的秋旱季节,气候条件适宜可延至12月中、下旬,以为害植株初生嫩叶为主;春后气温回升,3～5月间再度发生,为害花器和嫩荚,对紫云英种子产量有较大影响.本试验目的在于研究乐果及溴氰菊酯(Decis)在花期治蚜对于紫云英留种的增产效果,供生产上参考应用.
Aphids infected with the milk vetch are mainly Aphisglycinesmats. There are two peak periods occurring in our region each year: once in winter, the autumn dry season often occurs after the end of October, and the climatic conditions can be extended to middle and late December , Mainly to harm the plant’s young leaves; the temperature rose after spring and reoccurred between March and May, which harmed flower organs and tender pods and had a great impact on the seed yield of Astragalus sinicus.The purpose of this experiment is to study the effects of dimethoate and cyanogen bromide Pyrethroids (Decis) in the flowering aphids for the remaining production of milk vetch growth, for the production of reference applications.