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定海县位于浙江东北沿海舟山群岛西侧,属北亚热带南缘季风气候区,因四周被海域所包围,故岛上气候的特点是冬暖夏凉,空气湿润,雨量充足,对喜温好湿的棉盲蝽发生极为有利。自八十年代以来,棉盲蝽的发生为害日趋严重,1983年棉田受害面积占全县总棉田面积的8.2％,1985年为害面积扩大,占全县棉田的45.1％,为害后皮筛损失20～40％,部分受害严重田块损失高达
Dinghai County is located on the west side of the Zhoushan Islands along the northeastern coast of Zhejiang Province and belongs to the monsoon climate zone on the southern margin of the northern subtropics. Because it is surrounded by the sea, the climate on the island is characterized by warm winter, cool summer, wet air, adequate rainfall, The occurrence of cotton lacewings is extremely favorable. Since the 1980s, the occurrence of cotton lacewings has become more and more serious. In 1983, the area affected by cotton fields accounted for 8.2% of the total area of cotton fields in the county. In 1985, the area of damage increased, accounting for 45.1% of the total cotton fields in the county. ~ 40%, some of the serious damage to the field up to loss