【作者】 梅丽艳； 李志勇；

【Author】 Mei Li-yan,Li Zhi-yong (Institute of Plant Protection,Heilongjiang Academy of Agricultural Sciences,Harbin 150086)

【机构】 黑龙江省农业科学院植物保护研究所；

【摘要】 对黑龙江省玉米弯孢菌叶斑病菌主要致病菌新月弯孢菌[Curvularia lunata(Wakker)Boed.]进行生物学特性研究,结果表明,最适生长和孢子萌发温度为25～35℃,弯孢菌产孢适宜温度是25～30℃,其中30℃时菌落直径最大、孢子萌发率最高,产孢量为高峰(为产孢高峰)。在25℃条件下,相对湿度96%以上孢子开始萌发,随相对湿度的增加,萌发率也明显增加,分生孢子在水滴中萌发率最高。病原菌对酸碱度的适应范围较广,以pH值为6～8时最适宜菌丝生长、产孢量最大;孢子萌发的适宜pH值是5～8,最适pH值为7。光照对菌丝体无显著影响,光暗交替有利于孢子的形成,光线对孢子萌发有抑制作用。更多还原

【Abstract】 Some biological characters of Curvularia lunata in Heilongjiang Province were studied.The results showed that the optimum temperature for pathogen hyphae growth and conidia germination were 25～35℃.The suitable temperature of spore production is 25～30℃. When the temperature is 30℃,Colony diameter is largest,spore germination rate is highest, and sporulation is at the peak(for sporulation peak).Spores began to germinate at 25℃and relative humidity above 96%.with the relative humidity increasing,the germination rate increased significantly.The conidia germination rate is highest in water droplets.The pathogens can adapt wider scope of pH,the optimum pH for mycelial growth and sporulation maximum is 6～8.the suitable pH range for spore germination is 5～8,the best suitable pH value is 7.The effect of light is not obvious to pathogen growth,alternating light and dark is conducive to the formation of spores and the spore germination can be inhibited for the light.更多还原