不同杀菌剂对莲藕腐败病菌的室内毒力测定及田间防治效果  

Toxicity Test of Different Fungicides on Pathogenic of Lotus Corruption and Control Effect in the Field

作　　者：梁志怀 魏林 成燕清 陈玉荣 张屹[3] 王献慧[3] 

机构地区：[1]湖南省西瓜甜瓜研究所,长沙410125 [2]湖南省植物保护研究所 [3]中南大学研究生院隆平分院

出　　处：《长江蔬菜》2011年第16期60-63,共4页Journal of Changjiang Vegetables

基　　金：国家公益性行业(农业)科研专项经费项目"水生蔬菜产业技术体系研究与示范"(200903017)

摘　　要：人工室内接种筛选出F1和F2两个莲藕腐败病菌强致病性菌株。应用菌丝体生长速率法,测定了生产中防治莲藕腐败病常用化学农药对F1和F2的室内毒力。测定结果表明,供试药剂对该病原菌菌丝生长的抑制作用存在较大的差异,其中以硫磺多菌灵的效果最好,对2个供试菌株的EC50分别为11.22μg/mL和12.30μg/mL;其次为甲基硫菌灵,对2个菌株的EC50分别为46.06μg/mL和11.32μg/mL;腐霉利的效果最差,对2个菌株的毒力分别为303.09μg/mL和426.12μg/mL。应用室内抑菌效果较好的硫磺多菌灵和甲基硫菌灵对腐败病严重发生的藕田进行病害防治,结果显示,2种药剂对病情的发展具有一定的控制作用。The method of mycelium growth rate applied to measure the indoor virulence of chemical pesticides on F1 and F2,strains of Fusarium oxysporum,the results showed that there wes obvious difference of effect inhibiting the growth of the pathogen mycelium between the tested chemical pesticides,which sulfur carbendazim was the best,the two tested strains EC50 were 11.22 μg/mL and 12.30 μg/mL,followed by thiophanate-methyl,the two strains of the EC50 46.06 μg/mL and 11.32 μg/mL;Procymidone,the worst,were 303.09 μg/ml and 426.12 μg/mL.Application of sulfur bacteria and carbendazim thiophanate-methyl to prevent the lotus root corruption,the results showed that two agents had a certain control action to the disease＇s development.

关 键 词：化学杀菌剂 莲藕腐败病菌 室内毒力 田间防效 

分 类 号：S436.45[农业科学—农业昆虫与害虫防治]