【摘要】 对玉米弯孢菌叶斑病流行环节的若干问题研究表明:玉米叶面渗出物对弯孢菌孢子萌发及附着孢形成有显著的促进作用;弯孢菌孢子主要在白天飞散;弯孢菌叶斑病较大面积发病田经1个月左右,顺风向可传播约250 m;病害传播梯度模型为xi=159.33.exp(-0.010 3di);病害空间分布为随机分布。更多还原

【Abstract】 Some epidemic links of maize curvularia leaf spot disease were studied.The results showed that oozy matter in maize leaf could accelerate remarkably the germination and appressorium formation of spores.Spores of Curvularia lunata were flying apart mainly in daytime.In a month,the disease could spread 250 meters in the same direction as the wind.The disease gradient model was xi=159.33·exp(-0.010 3di).Space distribution of the disease was random.更多还原