1986～1989年对烟台市737个苹果绵蚜发生园片进行了普查,其中莱州市蔬菜研究所的7年生苹果园,共35亩,为繁育菜种,其中20亩大白菜,15亩间种大葱。经调查,间种白菜的苹果树绵蚜发生株率达52%,而间种大葱的苹果树基本未查到苹果绵蚜,且其他病害也较间种白菜者轻。因此认为在幼龄苹 From 1986 to 1989, 737 apple aphid occurrence yards in Yantai City were surveyed. Among them, the 7-year-old apple orchard of Laizhou Vegetable Research Institute had a total area of ​​35 mu, of which 20 mu were Chinese cabbage and 15 mu Green onions. According to the survey, the occurrence rate of cotton aphid in apple tree with intergeneric cabbage was 52%, while that of apple tree was not found in apples of green onions, and other diseases were lighter than that of intercropped cabbage. So think young in the apple