农药及不同萌发因素对尖角突脐孢菌菌株X27分生孢子萌发的影响  

Effect of Pesticides and Different Affecting Factors on Conidium Germination of Exserohilum monoceras Strain X27

作　　者：陈勇[1] 倪汉文[2] 张宏军[2] 李晓晶[2] 李健强[3] 王琦[3] 黄美莲[4] 

机构地区：[1]华南农业大学农学院,广州510642 [2]中国农业大学农学与生物技术学院,北京100094 [3]农业部农药化学与应用技术重点开放实验室,北京100094 [4]广东省农业干部学校,广州510500

出　　处：《吉林农业大学学报》2004年第4期388-393,共6页Journal of Jilin Agricultural University

基　　金：农业部农业结构调整重大技术研究专项基金资助(No 2003-07-03B);长春市科委新星种子基金资助项目

摘　　要：试验采用平板表面萌发法测定了温度、pH值、光照、湿度及农药对尖角突脐菌菌株X27分生孢子萌发的影响。结果表明:尖角突脐孢菌其离体干燥贮藏在约4℃下至少18个月还能保持活性;分生孢子萌发的适宜温度范围为20～30℃,高于35℃或低于15℃,对分生孢子的萌发不利;分生孢子快速萌发的初始酸碱条件为pH4～7;适合该菌分生孢子萌发的相对湿度范围为80%～100%;光照不利于分生孢子快速萌发;低剂量敌稗使分生孢子开始萌发时间推迟4h,并使部分萌发的菌丝生长不良;丁草胺明显推迟分生孢子萌发时间;二氯喹啉酸和苄嘧磺隆对分生孢子的萌发影响不明显;用低剂量的多菌灵和代森锰锌处理,分生孢子至少24h内不萌发;稻瘟灵和恶霉灵混剂、三环唑推迟分生孢子开始萌发时间。The virulence of the conidia could be maintained for more than 18 months when conidia were stored at about 4℃. For conidium germination, optimal temperature range was from 20℃ to 30℃, the optimal initial pH 4～7, and the humidity range from 80% to 100%, and conidia could germinate whether it was light or dark. Herbicides propanil and butachlor could significantly inhibited conidium germination and hyphal growth. But quinclorac and bensulfulfuron-methyl did not. Fungicides carbendazim and mancozeb seriously inhibited conidium germination, whereas tricylazole and coformulation of hymexazol plus isoprothiolane did not.

关 键 词：真菌除稗剂 尖角突脐孢菌 分生孢子 孢子萌发 

分 类 号：S451.21[农业科学—植物保护]