变叶木新病害白粉病病原菌生物学特性测定
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摘要:本研究测定了不同条件对变叶木[Codiaeum variegatum BI var. pictum(Lodd.)Muen]白粉病分生孢子萌发的影响。结果表明,分生孢子萌发的适宜温度为21~24 ℃,最适温度为24 ℃;最适相对湿度为80%;在pH为8时,萌发率最高;光照对分生孢子萌发无影响;葡萄糖、氯化铵有利于分生孢子的萌发;分生孢子的致死条件为43 ℃ 10 min。可见变叶木白粉病菌喜好温暖、潮湿、偏碱、富含营养的环境。
关键词:变叶木[Codiaeum variegatum BI var. pictum(Lodd.)Muen];白粉病;新番茄粉孢菌;生物学特性
中图分类号:S436.8 文献标识码:B 文章编号:0439-8114(2016)21-5548-03
DOI:10.14088/j.cnki.issn0439-8114.2016.21.027
Biological Characteristics of the Pathogen of Codiaeum variegatum Powdery Mildew
ZHOU Fang-xue,YANG Yong-li,WEI Yun-xie,ZHANG Kai-li,LIU Ya-nan,LIU Xiao-mei
(College of Environment and Plant Protection, Hainan University/Key Laboratory of Protection and Development Utilization of Tropical Crop Germplasm Resources of Ministry of Education Hainan University, Haikou 570228, China)
Abstract: The effects of different conditions on the conidial germination of Oidium neolycopersici were studied. The results showed that,the effective temperature for conidial germination was in the range of 21~24 ℃,and the optimum temperature was 24 ℃. The optimum relative humidity was 80%. The percentage of conidial germination reached the highest at pH 8.0. Light had no effect on conidial germination. Glucose and ammonium chloride were better for the conidial germination. Lethal temperature of conidia was 43 ℃ for 10 min. Obviously the warm,humid,weak alkali,and nutritious environment was favourite for pathogen.
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