微生物菌剂与甲霜·霜霉威复配对烟草黑胫病的防治效果
刘畅 , 陈玉国 , 苗淑月 , 白静科 , 王雨 , 李小杰 , 王杰 , 徐敏 , 李淑君
山西农业科学 ›› 2026, Vol. 54 ›› Issue (4) : 71 -77.
微生物菌剂与甲霜·霜霉威复配对烟草黑胫病的防治效果
The Control Effect of Microbial Inoculum Combined with Metalaxyl Propamocarb on Tobacco Black Shank
为了探究微生物菌剂与化学药剂联合防控烟草黑胫病的效果,采用菌丝生长速率法分别测定了微生物菌剂GKZ和化学药剂25%甲霜·霜霉威WP对烟草黑胫病菌的室内毒力,利用含药平板法测定二者的生物相容性,并通过盆栽和大田试验分别测定微生物菌剂GKZ、25%甲霜·霜霉威WP和复配剂(VGKZ∶V25%甲霜·霜霉威=1∶1)对烟草黑胫病的防治效果。室内毒力测定结果显示,微生物菌剂GKZ对烟草黑胫病菌具有较好的抑制效果,其EC50为1.31×104 cfu/mL,25%甲霜·霜霉威WP对烟草黑胫病菌的EC50为0.87 mg/L。相容性试验结果表明,0.87 mg/L的25%甲霜·霜霉威WP对微生物菌剂中的菌株生长无显著抑制作用。盆栽试验结果表明,复配剂处理对烟草黑胫病的防治效果最高(60.18%),显著高于微生物菌剂GKZ(38.71%)和25%甲霜·霜霉威WP(35.29%)单独处理。大田试验结果表明,复配剂对烟草黑胫病的防治效果高于单剂或与其相当,3个处理间无显著差异。综上,微生物菌剂GKZ与25%甲霜·霜霉威WP复配使用能够提高对烟草黑胫病的防治效果,同时可有效降低25%甲霜·霜霉威WP的使用量。
In order to explore the effect of microbial inoculum combined with chemical agent on tobacco black shank, in this study, the indoor toxicity on tobacco black of microbial inoculum GKZ and 25% of metalaxyl propamocarb(WP) was determined by mycelial growth rate method, and the biocompatibility between the two was measured by plate with drug method. Also, the control effect on tobacco black shank disease of microbial inoculum GKZ, 25% of metalaxyl propamocarb WP, and the compound agent(VGKZ∶VWP=1∶1) was tested through pot and field experiments. The indoor toxicity results showed that the microbial inoculum GKZ could effectively restrain tobacco black shank and its EC50 was 1.31×104 cfu/mL, while the EC50 against tobacco black shank of 25% of metalaxyl propamocarb WP was 0.87 mg/L. The compatibility test results showed that 0.87 mg/L of 25% of metalaxyl propamocarb WP had no significant inhibitory effect on the growth of strains in microbial inoculum. The pot experiment results showed that the compound agent had the highest control effect on tobacco black shank disease(60.18%), significantly higher than that of the microbial inoculum GKZ(38.71%) alone and 25% of metalaxyl propamocarb WP(35.29%) alone. The results of field experiments showed that the control effect of the compound agent on tobacco black shank was higher than the single agent or equivalent, and there were no significant differences among the treatments. In conclusion, the combination application of the microbial inoculum GKZ and 25% of metalaxyl propamocarb WP could improve the control effect on tobacco black shank and effectively reduce the use of metalaxyl propamocarb WP.
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