论文部分内容阅读
从中国山西、内蒙古、山东、海南、江苏、福建和陕西省(自治区)不同市、县从未使用过啶菌噁唑的露地或保护地采集并经单孢分离获得166株番茄早疫病菌,采用菌丝生长速率法测定了病原菌群体对啶菌噁唑的敏感性。结果表明:啶菌噁唑对番茄早疫病菌的EC50值范围在0.11~2.29 mg/L之间,敏感性频率呈正态分布,其均值(0.56±0.39)mg/L可作为番茄早疫病菌对啶菌噁唑田间抗性监测的敏感基线;不同采集地菌株对啶菌噁唑的敏感性存在差异,其中采自福建省的菌株敏感性最高,而山西省大同、晋中和长治市的菌株敏感性最低。200 mg/L啶菌噁唑对番茄早疫病防治具有优异的保护和治疗作用,且接菌前4 d内施药和接菌后1~2 d内施药防效最佳。研究表明,啶菌噁唑对番茄早疫病防治具有良好的实际应用前景。
A total of 166 strains of A. solani were isolated from the open field or the protected areas in northeast China, Shanxi, Inner Mongolia, Shandong, Hainan, Jiangsu, Fujian and Shaanxi provinces (autonomous regions) The mycelial growth rate method was used to determine the susceptibility of pathogen to daclizumab. The results showed that the EC50 value of diflubenzuron for Alternaria solani was between 0.11 and 2.29 mg / L, and the sensitivity frequency was normal. The mean (0.56 ± 0.39) mg / L was Susceptibilities to dapivoxil were sensitive to the monitoring of resistance to dapivoxil in the field. The susceptibilities of isolates to difenoconazole were different among the isolates collected from Fujian Province. Among them, strains from Fujian Province had the highest sensitivity, while those from Datong, Shanxi and Changzhi Strain the lowest sensitivity. 200 mg / L pyridabenoxazole had an excellent protective and therapeutic effect on the control of early blight of tomato, and the best control effect was given within 1 ~ 2 d after application and within 4 days before inoculation. Studies have shown that the fungicide azadirachtin tomato early blight prevention and treatment has a good practical application.