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室内控制性测定结果表明,玉米纹枯病菌(RhizoctoniasolaniAG1鄄IA)菌丝生长的温度10～35℃,最适温度25～30℃;菌核萌发温度18～35℃,最适温度25～30℃。在幼苗和离体叶鞘上由菌丝引起侵染和发病的温度15～35℃,以25～30℃最适宜,潜育期最短,病斑较大。田间分期播种观察分析,气温和地面温度与病害始见的历期(播种期至病害初见期)分别呈显著负相关和极显著负相关。在田间自然条件下,始病的温度为20℃左右。这些结果为了解玉米纹枯病的发生规律,开展预测预报提供了科学依据。
The results of laboratory control tests showed that the mycelial growth of Rhizoctonia solani AG1-IA was 10 ~ 35 ℃, the optimal temperature was 25 ~ 30 ℃, the temperature of sclerotia was 18 ~ 35 ℃, the optimum temperature was 25 ~ 30 ℃. In the seedling and leaf sheath on the body caused by the hyphae infection and the incidence of temperature 15 ~ 35 ℃, 25 ~ 30 ℃ the most appropriate, the shortest incubation period, lesion larger. Field sowing observation and analysis, temperature and ground temperature and the disease began to see the period (sowing date to disease early stage) were significantly negatively correlated and very significant negative correlation. Under natural conditions in the field, the onset temperature is about 20 ℃. These results provide a scientific basis for understanding the occurrence of corn sheath blight and forecasting.