温度对玉米纹枯病菌生长与发病的影响  

The effect of temperature on the growth and development of Rhizoctonia solani AG1-IA

作　　者：严吉明[1] 叶华智[1] 金庆超[1] 张敏[1] 

机构地区：[1]四川农业大学植保系,四川雅安625014

出　　处：《中国植保导刊》2005年第6期7-9,共3页China Plant Protection

基　　金：四川省科技厅应用基础研究项目

摘　　要：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。Rhizoctonia solani AG1-IA was studied under specific indoor conditions, results showed that temperature ranges of its growth and development were 10～35℃ and 18～35 ℃ respectively, both optimum growth temperature and optimum development temperature were 25～30 ℃. Mycelium could infect seedlings and sheaths in vitro from 15 ℃ to 35 ℃, optimum temperature was 25～30 ℃, the incubation period was the shortest and the lesion sizes were biggest in optimum temperature. Field test indicated that the temperatures of air and soil were correlated with disease occurrence, occurring temperature was 20 ℃ under natural conditions. The study provided scientific bases for forecasting corn sheath blight.

关 键 词：纹枯病菌 发病 最适温度 玉米纹枯病 测定结果 菌丝生长 萌发温度 分期播种 地面温度 自然条件 发生规律 科学依据 预测预报 负相关 控制性 潜育期 播种期 20℃ 病害 菌核 叶鞘 幼苗 病斑 田间 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治] S858.28[农业科学—植物保护]