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2009年对四平地区不同栽培模式下玉米大斑病自然发病情况进行调查。分析表明,Logistic模型能够反映大斑病流行时间动态情况。免耕模式有利于玉米大斑病的发生,而在宽窄行模式下该病发生较轻。不同栽培模式下玉米大斑病的指数增长期不同,在免耕模式下的病情指数最高,依次为免耕、平播、常规、宽窄行栽培模式,该时期也是最佳药剂防治时间。玉米大斑病流行过程中的病情严重程度依次为免耕>平播>常规>宽窄行。
In 2009 the Siping area under different cultivation patterns of maize leaf spot disease were investigated. Analysis shows that the Logistic model can reflect the prevalence of the prevalence of maculopathy. No-till mode is beneficial to the occurrence of maculopathy in corn, while it is less in width and width mode. Under different cultivation modes, the exponential growth period of maize leaf spot was different. The highest disease index in no-tillage mode was no-tillage, sowing, conventional and width-width cultivation mode, which was also the best time for prevention and treatment of maize leaf blight. The severity of maize leaf spot epidemic in the order of no-tillage> broadcasters> routine> width and width.