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.
出处
《草地学报》
CAS
CSCD
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)
