黑龙江省玉米青枯病发生危害调查及钾肥防病研究  

Investigation on Harmfulness and Prevention with Potash Fertilizer of Bacterial Wilt of Corn in Heilongjiang Province

作　　者：李莫然[1] 梅丽艳[1] 韩庆新[1] 王芊[1] 

机构地区：[1]黑龙江省农科院植保所

出　　处：《黑龙江农业科学》1994年第2期12-16,共5页Heilongjiang Agricultural Sciences

摘　　要：１９８８～１９９３年对黑龙江省２８个市县进行调查；玉米青枯病发生普遍，一般发病率５～２０％，严重地块达５０％以上，主产区发病重，主栽品种较大多数高度感病。发病程度除与品种、气象条件有关外，还与灌水，播种时期，密度，播种方法等栽培措施关系密切。土壤中施用氯化钾可减轻玉米青枯病发生程度，感病品种尤为明显，随着钾肥施用量增加，可减轻发病率２５．６～４４．５％，以１５公斤／亩为最好，施用氯化钾可提高玉米产量，增加茎高，茎粗，茎秆强度，是综合防治一项主要措施。An investigation on outbreak of stalk vots of corn were conducted in 28 cities and counties of Heilongjiang province, in 1988￣1993. Generally the disease incidence was 5￣20%,and even more than 50% in some fields affected severely. The disease is prevalent in those regions where corn grown as stable crop. Leading varieties are much more sensitive than most of others. Disease incidence related closely with not only varieties and meterological condition, but cultivation practices such as irrigation, sowing date, sowing density, sowing method and so on. The incidence can be decreased through applying potassium chloride into soil,especially for sensitive varieties. An optimum result can be obtained from application of potassium chloride 15kg/mu. Applying potassium fetilizer is a most principal practice for the increase of plant height and stalk strength.

关 键 词：玉米 青枯病 危害 钾肥 防治 

分 类 号：S435.131.4[农业科学—农业昆虫与害虫防治]