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棉花黄叶枯死病,又叫贫钾病,(当地群众叫黄叶病),是我县棉花中后期常见的一种病害。对棉花的生长发育,特别是对争结秋桃威胁很大。为了探索棉花黄叶枯死病的发生原因,找出有效的防治途径,笔者从六十年代起不断进行了一些调查试验,现整理如下:一、发病面积此病自一九六五年以后,在我县每年都程度不同地发生。据原山头公社一九六五年种植六千亩棉花的调查,发病面积达30—40%,山头大队的四百七十亩棉花,发病棉田达二百二十一亩,占总面积的44.8%,其发病株率达60—90%。病情指数四十至六十七点八三的四十二亩,占总棉田面积的8.94%,发病株率在10—40%;病情指数十左右的一百六十九亩,占总棉田面积35.3%,最严重的第五生产队发病面积达55.7%。
Cotton leaf blight dead, also known as poor potassium disease, (yellow leaves of the local masses called disease), is a common disease in our county in the late cotton. The growth and development of cotton, especially for the autumn knot dispute a lot of threat. In order to explore the causes of cotton yellow leaf wither outbreak and find out an effective way of prevention and treatment, the author from the sixties onwards conducted some investigations and tests, are now organized as follows: First, the incidence of the disease since 1965, after My county occurs differently every year. According to a survey of 6,000 mu of cotton planted by the original hill commune in 1965, the disease area was 30-40%. Four hundred and seventy acres of cotton of the hill brigade and 221 acres of cotton fields were affected, accounting for 44.8 of the total area %, The incidence of strains of 60-90%. Forty-two acres with a disease index of 40-67.83, accounting for 8.94% of the total area of cotton fields, the incidence of strains in the 10-40%; disease index of about 169 acres, accounting for Cotton field area of 35.3%, the fifth most serious production team incidence of 55.7%.