论文部分内容阅读
[方法]通过菌丝生长速率法测定了10种杀菌剂对引起甘薯黑斑病的甘薯长喙壳菌(Ceratocystis fimbriataEllis and Halsted)的毒力及部分药剂混配的联合毒力。[结果]粉唑醇毒力较高,其EC50值为0.0654 mg/L;其次为氟硅唑,EC50值为0.1508 mg/L;异菌脲、三唑酮、霉灵的EC50值在1~10 mg/L之间,抑菌活性高于甲基硫菌灵。联合毒力的测定结果表明:甲基硫菌灵与百菌清质量比2∶1的配比、甲基硫菌灵与粉唑醇质量比2∶1的配比、百菌清与粉唑醇质量比5∶1的配比增效作用最强。[结论]为筛选防治甘薯黑斑病的杀菌剂提供了毒力测定依据。
[Method] The virulence of 10 fungicides against Ceratocystis fimbriata Ellis and Halsted and the combined virulence of some agents were determined by mycelial growth rate method. [Result] Fenoxapol had a higher toxicity with an EC50 of 0.0654 mg / L, followed by flusilazole with EC50 of 0.1508 mg / L, EC50 of iprodione, triadimefon and moldmycin of 1 ~ 10 mg / L, antibacterial activity than thiophanate-methyl. The results of the determination of the joint virulence showed that the ratio of thiophanate-methyl chlorothalonil to chlorothalonil was 2:1, the ratio of thiophanate-menthol to pollazurol was 2:1, Alcohol ratio of 5: 1 than the strongest synergistic effect. [Conclusion] The results provided the basis for the determination of virulence for the screening of fungicides against sweet spot black spot disease.