镰刀菌酸对水稻稻瘟病菌和稻曲病菌的抑制作用  

Research of the prevention of Fusaric Acid to Magnaporthe oryzae and Ustilaginoidea virens

作　　者：甘林[1,2] 阮宏椿 代玉立[1,2] 杜宜新 石妞妞[1,2] 杨秀娟 陈福如[1,2] GAN Lin;RUAN Hong-chun;DAI Yu-li;DU Yi-xin;SHI Niu-niu;YANG Xiu-juan;CHEN Fu-ru(Institute of Plant Protection,Fujian Academy of Agricultural Science,Fuzhou,Fujian 350013,China;Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Fuzhou,Fujian 350003,China)

机构地区：[1]福建省农业科学院植物保护研究所,福建福州350013 [2]福建省作物有害生物监测与治理重点实验室,福建福州350003

出　　处：《福建农业学报》2018年第7期750-754,共5页Fujian Journal of Agricultural Sciences

基　　金：国家重点研究发展计划项目(2016YFD0300700);福建省科技计划项目--省属公益类科研院所基本科研专项(2016R1023-2);福建省农业科学院科技创新团队建设项目(STIT2017-1-8)

摘　　要：为研发新型农用杀菌剂的活性物质,采用菌丝生长速率法和孢子萌发抑制法,测定镰刀菌酸对水稻稻瘟病菌和稻曲病菌的抑制作用。结果表明,镰刀菌酸对水稻稻瘟病菌和稻曲病菌具有较强的抑菌活性,其对病菌菌丝生长的EC50值分别为326.36、8.27mg·L^(-1),对孢子萌发的EC50值分别为40.17、222.93 mg·L^(-1)。此外,盆栽试验发现,在水稻破口期和齐穗期喷施400mg·L^(-1)镰刀菌酸,对稻瘟病的防治效果为66.72%;而在水稻破口前7d喷施400mg·L^(-1)镰刀菌酸,其对稻曲病的防治效果可达63.08%。In order to develop active substance of new fungicide,the prevention effect of fusaric acid to Magnaporthe oryzae and Ustilaginoidea virens were determined by mycelium growth rate methods and spore germination.The results indicated that fusaric acid had higher inhibition on M.oryzae and U.virens.The EC 50 value of fusaric acid to the mycelium growth of M.oryzae and U.virens were 326.36 and 8.27 mg·L-1,and the EC 50 value on spore germination were 40.17 and 222.93 mg·L-1.In addition,the pot experiments showed that the prevention control on M.oryzae was 66.72%with spraying fusaric acid(400 mg·L-1)in the period of rice crevasse and full panicle,and the prevention control of fusaric acid(400 mg·L-1)on U.virens was 63.08%with spraying in 7 days before the period of rice crevasse.

关 键 词：镰刀菌酸 稻瘟病菌 稻曲病菌 毒力测定 

分 类 号：S436[农业科学—农业昆虫与害虫防治]