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为了解李病害的发生规律并为大田防治提供理论依据及实用手段，笔者对湖南李园普遍发生且为害严重的一种新病害——李叶枯病进行了病原菌鉴定、生物学特性和药剂防治试验的研究．初步确定李叶枯病的病原菌为枇杷叶拟盘多毛孢菌，该病原菌最适生长和产孢的培养基为ＰＤＡ，ｐＨ值为４～９，菌丝生长最适温度为２５℃，产孢最适温度为２５～３０℃，以１６ｈ光照条件菌丝生长最好，拌种双、托福灵、多菌灵等３种药剂对该病原菌有较好的抑菌效果，复配制剂桃李植保素在盆栽药剂试验中防效最好．
In order to understand the rule of disease occurrence and provide theoretical basis and practical method for field control, the author carried out pathogen identification and biological characteristics And pharmaceutical control test research. It was initially determined that the pathogen of Li leaf blight was Pseudomonas aeruginosa, the optimum medium for growth and sporulation of the pathogen was PDA, the pH was 4 ~ 9, the optimum temperature for mycelial growth was 25 ℃, The optimum temperature of spore was 25 ~ 30 ℃, the mycelial growth was the best under 16 h light conditions, the three kinds of agents such as double-seed dressing, tobramycin and carbendazim had good antibacterial activity against the pathogen. Supremacy in potting agent test the best control effect.