环境条件对棉花轮纹斑病菌分生孢子萌发的影响  

Effect of Environment Conditions on Conidia Germination of Cotton Alternaria Leaf Spot

作　　者：李莎[1] 张文蔚[1] 齐放军[1] 司宁[1] 简桂良[1] 

机构地区：[1]中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室,北京100193

出　　处：《棉花学报》2011年第5期472-475,共4页Cotton Science

基　　金：国家科技支撑计划课题(2006BAD08A07-1);国家公益性农业科研专项(3-19)

摘　　要：为了明确影响棉花轮纹斑病发生和流行的因素,对棉花轮纹斑病菌分生孢子萌发的营养条件、光照、温度、湿度等条件进行了研究。结果表明:病菌分生孢子在不同营养条件下萌发率存在显著差异,在SDAY培养液中萌发速度快,萌发率最高;光照对病原分生孢子萌发有显著影响,黑暗处理更有利于分生孢子萌发;分生孢子萌发对温湿度的要求较高,孢子萌发的适宜温度为30℃;空气相对湿度越高分生孢子萌发率越高,在水滴中萌发最好;不同棉花品种叶片研磨液对分生孢子的萌发有显著影响,宁4-14、垦62的叶片研磨液更利于分生孢子萌发。The effect of nutrition, illumination, temperature, humidity on conidia germination of cotton alternaria leaf spot was studied. The results showed that the pathogen conidia has different germination capacity in different conditions： conidia in the SDAY culture solution has the highest germination rate; dark treatment is more conducive to conidia germination; the optimum temperature is 30°C; for the relative humidity, the higher the better, the optimum humidity is in the water drops; slurry of different varieties cotton leaves had a significant effect on the conidia germination rate, and slurry of Ning 4-14 and Ken 62 is more conducive to conidia germination.

关 键 词：棉花轮纹斑病菌 环境条件 分生孢子 萌发 侵染 

分 类 号：S435.621[农业科学—农业昆虫与害虫防治]