大猿叶虫为萝卜、油菜、白菜等十字花科蔬菜主要害虫,对四季豆、菠菜亦可为害,在合肥地区每年发生两代,以成虫越冬。成虫和幼虫均为害蔬菜,但据在我院农场观察越冬后的雌成虫,只在什草上产卵,孵出的第一代幼虫,亦仅取食几种什草叶片及嫩芽,菜园蔬菜上并无此虫为害。为了进一步摸清越冬成虫产卵及第一代幼虫发生场所,密集程度和为害程度,找出有效的防治药剂,对越冬成虫的产卵寄主进行了调查,对第一代幼虫进行了药剂防治试验,现将初步结果整理如下: Big bug for the radish, rape, cabbage and other cruciferous vegetables, the main pests, green beans, spinach can be harmful to occur in Hefei, two generations each year to adult wintering. Adult and larvae are harmful vegetables, but according to the farm in our hospital overwintering female adults, only the grass spawning, hatching of the first generation of larvae, only eat a few kinds of grass leaves and shoots, vegetable garden No pests on vegetables. In order to further understand the place of birth and the first generation larvae of the overwintering adults, and to find out the effective prevention and cure agents, the spawning hosts of overwintering adults were investigated, and the first generation larvae were tested for drug control Now the preliminary results are organized as follows: