CAJ | 학술논문

采用菌丝生长速率法，分别测定了井冈霉素A、啶酰菌胺及两者间混配的毒力系数，及对生防潜力菌H158繁殖、生长的影响。结果表明，啶酰菌胺+井冈霉素A按1∶100、1∶200、1∶300和1∶400比例混配，对水稻纹枯病菌（Rhizoctonia solani）的EC50分别为5.5814、6.8186、5.2672、2.7772 mg/L，共毒系数分别为0.9716、1.5182、2.8210、6.8325，除1∶100表现为协同作用外，其他混合比例对纹枯病菌均表现为增效作用。啶酰菌胺对生防潜力菌H158的生长抑制作用不大，低浓度井冈霉素A对H158表现为相容性，较高浓度时有一定抑制作用。但两者混配药剂中加入H158，对其抑制情况与啶酰菌胺相似。混配剂中加入H158后对纹枯病菌的抑制率比未加H158时有所提高，均高于90.00%。
채용균사생장속솔법，분별측정료정강매소A、정선균알급량자간혼배적독력계수，급대생방잠력균H158번식、생장적영향。결과표명，정선균알+정강매소A안1∶100、1∶200、1∶300화1∶400비례혼배，대수도문고병균（Rhizoctonia solani）적EC50분별위5.5814、6.8186、5.2672、2.7772 mg/L，공독계수분별위0.9716、1.5182、2.8210、6.8325，제1∶100표현위협동작용외，기타혼합비례대문고병균균표현위증효작용。정선균알대생방잠력균H158적생장억제작용불대，저농도정강매소A대H158표현위상용성，교고농도시유일정억제작용。단량자혼배약제중가입H158，대기억제정황여정선균알상사。혼배제중가입H158후대문고병균적억제솔비미가H158시유소제고，균고우90.00%。
The toxicities of Jinggangmycin A and boscalid, as well as their mixture, against the pathogen of rice sheath blight Rhizoc-tonia solani were investigated by using the method of inhibition mycelial growth rate. The results showed that EC50 of Jinggangmycin A and boscalid were 114.0672 mg/L and 0.0569 mg/L, respectively, and EC50 of mixture of Jinggangmycin A and boscalid at rate of 1:100, 1:200, 1:300, and 1:400 were 5.5814 mg/L, 6.8186 mg/L, 5.2672 mg/L and 2.7772 mg/L, respectively. Co-toxicity index of these mix rates were 0.9716, 1.5182, 2.8210, and 6.8325, which means that almost all of the mixtures exhibited synergy effect, except the mix rate of 1∶100 showing additive effect. Boscalid showed little inhibition effect against the bacterium H158 at the concentration as high as 1.6 mg/ml. H158 can only be inhabited by Jinggangmycin A at higher concentration, however mixture of Jinggangmycin A and boscalid showed little inhibition effect against H158, the control efficient of which can be enhanced to more than 90%.