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紫云英潜叶蝇,属双翅目潜蝇科,在我省凡有种植紫云英的地方,每年都有不同程度的发生危害。据我们于一九七七年冬以来,在沙县洋枋一带紫云英田的调查观察,紫云英出苗后,成虫就陆续飞到紫云英叶片上危害和产卵繁殖,直到结荚成熟,尤其从开花至结荚,虫量更多,危害更剧。据在沙县调查,在虫口密度大的紫云英田块,有90％以上的小叶被害,特别是留种田,受害更重,严重地影响产量,成为紫云英生产上的重要大敌之一。现将两年来的初步调查研究的结果整理如下:
The purple leaf miner leaf miner, which belongs to the order Diptera Solenopsis, where in our province where there is a cultivation of milk vetch, every year there are different degrees of harm. According to the survey conducted in Ziyunyingtian of Yangbi in Shaxian County since the winter of 1977, adult worms flew one after another on the leaves of Astragalus sinicus and spawned until ovulation matured, Especially from the flowering to the pod, the amount of insects more harm more drama. According to a survey conducted in Shaxian County, more than 90% of leaflets were damaged in the densely populated Ziyunyingtian block. In particular, leaving the farmer more seriously affected the output and became one of the major enemies in the production of Ziyungying. The results of the preliminary investigation over the past two years are summarized as follows: