四种杀菌剂对苜蓿根和根颈腐烂病菌的室内毒力测定  

Toxicity Measurement of Carbendazim on Fusarium spp. in Alfalfa

作　　者：李敏权[1] 杨宝生[1] 侯军[1] 张自和[2] 

机构地区：[1]甘肃农业大学值保系,兰州730070 [2]甘肃省草原生态研究所,兰州730070

出　　处：《草地学报》2002年第4期270-273,共4页Acta Agrestia Sinica

基　　金：科技部"黄土高原退耕还草生态恢复与草畜产业化技术开发与示范"项目资助 (编号 2 0 0 0 -k0 1-0 4-0 1)

摘　　要：采用室内平皿生长速率法 ,研究四种杀菌剂对苜蓿根和根颈腐烂病的病原、尖孢镰刀菌、锐顶镰刀菌和半裸镰刀菌的毒力测定。结果表明 ,四种药剂对三种病原菌都有显著的抑制作用。其中多菌灵、甲基硫菌灵、枯腐宁和枯萎绝四种药剂对锐顶镰刀菌的有效中浓度 (EC50 )分别为 84 .93、2 2 1.0 0、5 3.74和 7.90μg/ m L ,对尖孢镰刀菌 EC50分别为 70 .12、12 5 .76、35 .75和 5 .87μg/ m L ,对半裸镰刀菌分别为 4 9.5 5、12 6 .6 1和 2 2 1μg/ m L。以枯萎绝的抑菌作用最为突出 ,对三种镰刀菌的 EC50 都在 10μg/ m L以下 ,枯腐宁次之 ,甲基硫菌灵最差。四种药剂的相关系数均在0 .96以上 。Fusarium oxysporum, F. acuminatum and F. semitectum caused crowm and root rot of alfalfa. The toxicity and efficacy of carbendazim, carbendazim thiram, experimental chemotherapeutant and thiophanate methyl to them were measured with mycelium growth rate test method. The result indicated that these fungicides had inhibition effect on Fusarium spp.The results indicated the mean median effective concentration value(EC 50 )was different. The EC 50 value of carbendazim thiram was 5.29μg/mL.But carbendazim was 68.2μg/mL, Even thiophanate methyl was 166.79μg/mL.

关 键 词：杀菌剂 苜蓿根 根颈腐烂病菌 室内毒力测定 镰刀菌 多菌灵 

分 类 号：S435.4[农业科学—农业昆虫与害虫防治]