散纹灯蛾Argina argus Kollar是夏季绿肥大猪屎豆Crotalaria assamica Benth.和菽麻(太阳麻)C.juncea L.的重要害虫,有时也为害三尖叶猪屎豆C.anagyroides H.B et K.和猪屎豆(三圆叶猪屎豆)C.mucronat Desv.等。 1966年我们在广西荔浦县盘瑶基点,对此虫的发生情况作了观察,并进行了防治试验。现将结果整理如下。 一、发生时期和为害情况 幼虫为害期从2月底开始,一直持续到冬季。大猪屎豆开花前,幼虫加害叶片,待花荚出现后,幼虫则多在花荚上为害,被害花荚,多数不结实或早落,造成种子失收。由于此虫为害 Argina argus Kollar is an important pest of summer crotalaria assamica Benth. And C. juncea L., and occasionally harms C. tabaci. And pig crotalaria (three leaves of crotalaria beans) C.mucronat Desv. And so on. In 1966, we started our experiment at Pan Yao in Lipu County, Guangxi Province. The results are now organized as follows. First, the occurrence and damage The larvae harm period from the end of February, continued until the winter. Large pigs beans before flowering, larvae damage leaves, until the flower pods appear, the larvae are more damage on the flower pods, the victim flower pods, the majority are not strong or early fall, causing the loss of seeds. Because of this pest damage