大豆疫霉卵孢子致死温度的测定  

Temperature affecting viability and germination of oospores of Phytophthora sojae

作　　者：王良华[1] 丁国云[1] 吴翠萍[2] 王源超[3] 郑小波[3] 

机构地区：[1]南京出入境检验检疫局,210001 [2]江苏出入境检验检疫局 [3]南京农业大学

出　　处：《植物检疫》2008年第6期351-353,共3页Plant Quarantine

摘　　要：大豆疫霉根腐病是由大豆疫霉菌(Phytophthora sojae)侵染引起的、危害极其严重的最具毁灭性的大豆病害之一。病原菌以卵孢子在土壤中越冬,在条件适宜时导致下一年大豆发生根茎腐烂。病原菌卵孢子也可以存在于患病种皮内,但其在病害循环中的作用还不清楚。卵孢子是大豆疫霉的主要传播方式。本研究中对大豆疫霉卵孢子的致死条件进行了筛选。结果表明,使用60℃湿热处理大豆疫霉卵孢子20min或80℃干热处理大豆疫霉卵孢子20min,其萌发率为0,且死亡率为100%。Phytophthora root and stem rot, caused by Phytophthora sojae, is a prevalent and destructive disease in some soybean- growing regions. The causal fungus overwiuters with oospores in soil and causes soybean root and stem rot next year. Oospores also exist in the diseased seed, but its real significance in the disease cycle is not known. This work aims to find pretreatment deadly temperature for exterminating Phytophthora sojae in imported seeds of soybean. It showed that, under the condition of 60 ℃ and keeping 20rain in humid or 80 ℃ and keeping 20min in dry, germination rate of oospore was 0% , and death rate was 100%.

关 键 词：大豆疫霉 卵孢子 致死温度 

分 类 号：S435.651[农业科学—农业昆虫与害虫防治] S41[农业科学—植物保护]