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我省棉区的气候特点是:气温足、日照少、秋雨多。气温足是棉花生长的有利条件;日照少、秋雨多则对棉花生产不利。这不仅影响棉花的生长、开花、结桃、吐絮,也给棉花生产带来管理上的困难和病虫的危害,造成棉花大量减产。病虫蔓延和危害程度与秋雨大小及持续时间有着重要关系。如危害棉花最凶的疫病以及炭疽病,在其适宜的温度(分别为22—23℃、25—30℃)条件下,如果秋雨多且持续时间长,发病程度就高,造成棉花霉烂
Climate characteristics of our province cotton area are: full temperature, less sunshine, autumn and more. Temperature is sufficient for the growth of cotton favorable conditions; less sunshine, autumn is more adverse to cotton production. This not only affects the growth, flowering, fruiting and bolting of cotton, but also brings about the management difficulties and insect pests to the cotton production, causing a lot of cotton production losses. Pest and disease spread and degree of harm and the size and duration of autumn has an important relationship. As the most fierce epidemic of cotton and anthracnose, under the conditions of its suitable temperature (22-23 ℃, 25-30 ℃ respectively), if the autumn is long and the duration is long, the disease will be high and the cotton will be rotten