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模拟2004年沈阳地区丹玉90玉米大斑病流行动态,结果表明:Logistic模型能反映丹玉90上玉米大斑病随时间增长的情况;玉米大斑病的指数增长期从出苗开始到7月末,逻辑斯蒂期从7月末到9月末,衰退期从9月末到玉米生育后期,最佳防治时间从苗期初见病斑到6月中旬。
The results showed that the Logistic model could reflect the situation of maize leaf spot over time in Danyu 90. The exponential growth period of maize leaf spot occurred from the beginning of emergence to the end of July Logistic period from the end of July to the end of September, the recession period from the end of September to the late maize growth period, the best prevention and treatment time from early seedling stage to spot in mid-June.