今年 3月份以来 ,蚜虫在宜昌市果树、蔬菜、花卉等作物上普遍特大发生 ,经宜昌市植保站 4月中旬调查 ,柑桔树每片嫩叶上有虫 1 2 0 0头以上 ,花卉黄杨树上每片叶 1 0 0 0头左右 ,白菜、黄瓜以及各种豆类小苗上发虫量每叶均在 50 0～ 2 0 0 0头左右 ,4月下旬～ 5月上旬 ,有翅蚜 Since March this year, aphids have generally occurred on crops such as fruit trees, vegetables and flowers in Yichang City. After investigation by Yichang Plant Protection Station in mid-April, more than 1,200 insects were found on the leaves of each citrus tree, Each piece of leaf on the poplar about 100, cabbage, cucumber and bean seedlings on the number of hair on the leaves each in about 50 0 ~ 2000, late April to early May, winged aphid