棉花红叶枯病,浙江慈溪棉农称“焙头杆”,萧山农民叫“棉瘟病”,是慈溪、萧山、余姚棉区的一种重要中后期病害。每年普遍发生,为害严重。1959年萧山县长河区江边大队江二生产队,共种植棉花1,692亩,发病面积达80％以上,其中严重受害、枯死的有180多亩。1963年慈溪县发病较重面积达10万5千余亩。1964年该县发病较重的棉田在5万亩左右。根据1964年9—10月间在周巷、长河、逍林、庵东、泗门、龙山等6个区13个公社调查96块棉田,共16,747棉株,株被害率22.3—87.9％,平均68.46％。近年来,为了探讨其发病原因,浙江农业大学植保系师生,曾于1959年和1964年先后在萧山和慈溪等地作了 Cotton leaf blight, cotton farmers in Cixi, Zhejiang called “baking rod”, Xiaoshan farmers called “cotton blast” is Cixi, Xiaoshan, Yuyao cotton area is an important mid-and late-stage disease. Pervasive every year, devastating. In 1959 Xiajiang County Changhe River waterfront brigade Jiang two production team, a total of 1,692 acres of cotton planting, the incidence of more than 80%, of which seriously injured, withered 180 acres. 1963 Cixi incidence heavier area of ​​105,500 acres. In 1964 the county incidence of heavier cotton fields in about 5 acres. According to the investigation of 96 cotton fields and 16,747 cotton plants from 13 communes in 6 districts of Zhouxiang, Changhe, Xiaolin, Andong, Simen and Longshan in September 1964, the average damage rate was 22.3-87.9%. The average 68.46%. In recent years, in order to explore its causes, Zhejiang Agricultural University, plant protection students and teachers, who had in 1959 and 1964 in Xiaoshan and Cixi has made