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今年入伏以来,南方棉区持续放晴,部分棉区经历渍涝之后又遇高温干旱天气,这样的生态环境是很易诱发棉粉虱为害的。棉粉虱有的地方叫烟粉虱或者白粉虱,5月份开始迁入棉田为害棉花幼苗,最宜发生气温为25℃~30℃,8~9月是为害高峰期。棉花大田一般在8月中旬开始为害棉株上部嫩叶,9月上旬迅速扩散蔓延,能殃及各类不同的棉苗。起初,嫩叶上只是点片为害,气候适宜时,短短几天棉株上中下部均可发生为害。下部叶
Since the beginning of this year, the southern cotton area has continued to clear up. Some cotton areas have experienced hot and dry weather after they have experienced waterlogging. This kind of ecological environment is very likely to cause cotton whitefly. Some whitefly locusts called Bemisia tabaci or whitefly, in May began to move into the cotton fields harm cotton seedlings, the most appropriate temperature is 25 ℃ ~ 30 ℃, 8 to September is the peak of damage. Cotton fields generally begin in mid-August damage upper leaves of cotton plants in early September spread rapidly spread, can bring disaster to all kinds of different cotton seedlings. At first, the young leaves just spot damage, climate suitable, just a few days cotton plant damage can occur in the lower part. Lower leaves