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棉花红叶茎枯病,俗称大斑病。前几年,嘉定县主要发生在高亢地、连作棉田和缺水缺肥耕作粗放的棉田。棉株得病后,引起早衰,棉叶焦枯脱落,结铃小,衣分低,品质差。一般发病田块每亩产量损失皮棉30～40斤,发病早、发病重的田块损失更大。通过近几年的实践,对棉花红叶茎枯病的发生有了初步认识。棉花同其他作物一样,氮、磷、钾三要素适当配合使用,才能正常生长。去年,在棉田上有重点的推广施用了氯化钾。通过后期调查,证明氯化钾防治棉花红叶茎枯病的效果很好。据12个公社、18个大队、
Cotton leaf blight, commonly known as big spot disease. A few years ago, Jiading County occurred mainly in high-pitched, even cotton fields and lack of water shortages farming extensive cotton fields. Cotton plant disease, causing premature aging, fall off the scorching of cotton, knot small, low clothing points, poor quality. The general incidence of crop loss per acre lint 30 ~ 40 pounds, the incidence of early, the incidence of heavy plots of greater loss. Through the practice in recent years, we have got a preliminary understanding of the occurrence of cotton leaf blight. Like other crops, cotton, nitrogen, phosphorus and potassium three elements properly used in order to normal growth. Last year, there was a key promotion and application of potassium chloride in cotton fields. Through the late investigation, potassium chloride prevention and treatment of cotton leaf blight is very effective. According to 12 communes, 18 brigades,