核盘菌对几种杀菌剂的敏感性研究

为了选择防治菌核病的有效药剂,采用FAO推荐的菌落直径法研究了常用杀菌剂对核盘菌敏感性的差异。结果表明:山西五寨菌株WZ2对腐霉利、多菌灵、菌核净、福美双、乙霉威、乙烯菌核利高度敏感(EC50在0.117 0~4.965 4μg.mL-1之间);对异菌脲中度敏感(EC50为5.069 0μg.mL-1);对代森锰锌和百菌清最不敏感(EC50为20.760 0,32.107 6μg.mL-1)。内蒙古菌株NM15和NM17均对腐霉利、多菌灵、菌核净、福美双、乙烯菌核利高度敏感(EC50在0.064 0~3.059 0μg.mL-1);对乙霉威、异菌脲中度敏感(EC50为7.330 7~13.823 4μg.mL-1之间);对代森锰锌最不敏感(EC50分别为37.645 3,42.303 0μg.mL-1)。另外,菌株NM15对百菌清高度敏感(EC50为2.104 8μg.mL-1),而NM17则对百菌清中度敏感(EC50为11.777 9μg.mL-1)。并且这三个菌株对腐霉利、百菌清的敏感性差异较大,而对其他药剂的敏感性差异不大。

Studies on Sensitivities of Sclerotinia sclerotiorium(Lib.) de Bary to Nine Fungicides

To select effective fungicides to control Sclerotinia disease caused by Sclerotinia sclerotiorium.The sensitivity of the pathogen to nine fungicides was tested by the method of FAO.The results showed that the strain of S.sclerotiorium from Wuzai was highly sensitive to procymidne,carbendazim,dimethachlon,thiram,diethofencarb and vinclozolin(EC500.117 0 ~4.965 4 μg·mL-1),middle sensitive to iprodione,(EC505.069 0 μg·mL-1),the lowest sensitive to mancozeb,chlorothalonil(EC5020.760 0,32.176 μg·mL-1).The two strains of NM15and NM17,were highly sensitive to procymidne,carbendazim,dimethachlon,thiram and vinclozolin(EC50 value 0.064 0~3.059 0 μg·mL-1);middle sensitive to diethofencarb and iprodione,(EC50 value 7.330 7~13.823 4 μg·mL-1);the lowest sensitive to mancozeb(EC50 37.645 2,42.303 0μg·mL-1).The strain of NM15was highly sensitive to chlorothalonil(EC50 2.104 8 μg·mL-1),but middle sensitive to chlorothalonil(EC5011.777 9 μg·mL-1).And the three strains had higher sensitivity difference to procymidne,chlorothalonil;but lower sensitivity difference to the two others.