论文部分内容阅读
[目的]明确小麦秆锈菌对醚菌酯的敏感性及其与三唑酮之间是否存在交互抗性。[方法]采用孢子萌发法测定78株菌株对醚菌酯和三唑酮的敏感性。[结果]醚菌酯对78株野生菌株EC50值的平均值为(0.181 8±0.081 2)mg/L,最大值是最小值的9.94倍,其敏感性分布频率呈连续性单峰曲线,且符合正态分布,故可作为敏感基线用于监测田间小麦秆锈菌对醚菌酯的敏感性变化。醚菌酯与三唑酮杀菌剂之间均不存在交互抗性。[结论]野生菌株对醚菌酯的敏感性的平均值(0.181 8±0.081 2)mg/L,可作为小麦秆锈菌对醚菌酯的敏感基线。醚菌酯可广泛用于小麦秆锈病的防治。此研究信息可为小麦秆锈病抗药性持续治理措施的制定以及杀菌剂生产和使用策略提供依据。
[Objective] The research aimed to clarify the sensitivity of wheat straw rust to kresoxim-methyl and the existence of cross-resistance between it and triadimefon. [Method] The susceptibility of 78 isolates to kresoxim - methyl and triadimefon were determined by spore germination method. [Result] The average values of EC50 of kresoxim - methyl against 78 strains of wild strains were (0.181 8 ± 0.081 2) mg / L and the maximum value was 9.94 times of the minimum. The distribution frequency of kresoxim - methyl was unimodal and continuous In line with the normal distribution, it can be used as a sensitive baseline for the detection of wheat stalk rust susceptible to kresoxim methyl. There was no cross-resistance between both kresoxim-methyl and triadimefon fungicides. [Conclusion] The average sensitivity of wild strains to kresoxim-methyl (0.181 8 ± 0.081 2) mg / L could be used as the sensitive baseline for kresoxim-methyl. Cyclosporin can be widely used in the prevention and treatment of wheat stem rust. The research information can provide a basis for the establishment of measures for the sustainable management of wheat stem rust resistance as well as the production and use strategy of bactericide.