据河南省方城县赵河公社病虫测报站郭文强同志报道:用蓖麻叶1市斤捣碎,加清水10市斤,浸泡两小时,过滤。倒入喷雾器,喷洒在10株小杨树(大观杨)的枝叶上,2小时后,观察到有64个金龟子中毒,在地面上翻滚挣扎不能再飞。喷药届第二天树下中毒死亡185头,第三天毒死79头,第四天毒死7头。喷药 According to Henan Province Fangcheng County Zhao River commune pest forecasting station Comrade Guo Wenqiang reports: 1 castrated with castor leaves pounds crushed, add 10 pounds of water, soak for two hours, filtered. Pour into a sprayer and spray it on the foliage of 10 poplar trees (Dagang Yang). Two hours later, 64 beetles were observed to be poisoned and tumbled on the ground could no longer fly. On the second day of spraying, 185 poison trees were poisoned, 93 were poisoned on the third day, and seven were poisoned on the fourth day. Spraying