摘要
为合理防治烟草赤星病，减少抗药性产生和农药残留，从云南省11个地州分商烟草赤星病菌菌株96株，就分商菌株对菌核净的抗药性进行了测定，结果表明，供试菌株中高抗菌株28个，中抗菌株39个，低抗菌株29个。不同来源的烟草赤星病原菌株的抗药性存在差异，以思茅、大理的菌株抗药性最高，昆明、红河、临沧抗药性最低。不同地州分离菌株高、中、低抗菌株的比例存在明显差别。大理永平昌街七昌村分离菌株AL208#抗药性最强．抗性倍数达20．30．玉溪市红塔区的菌株AL171#抗药性最低。96株烟草赤星病菌菌株对菌核净的EC50值平均为81．34mg／L．范围在13．28～269．58g／L。
To control tobacco brown spot disease rationally, reduce resistance to fungicide and reduce pesticide pollution,96 strains of Alternarria altemata were isolated from 11 region of Yunnan province and all isolates were determined their resistance to dimethachlon. The results indicated that of all tested isolates,there were 28 high resistance,29 middle resistance and 29 low resistance isolates respectively. The islates fungicide resistance from different region was different obviously,the highest resistant isolate come from Dali and Simao region and the Kunruing, Honghe, Lincang isolates had lowest resistance among all tested isolates. The evident disparity of high-resistance, mid-resistance and low-resistance isolates ratio was exist at different region. AL208# from Dali Yongping was the highest dimethachlon resistant isolate, its resistance multiple arrived to 20 compared to the lowest resistance isolate AL171#,which from Hongta District of Yuxi City. The ECs0 of 96 Alternaria alternata isolates was 81.34 mg/L in average, was in the range of 13.28 -269. 58 mg/L.
出处
《西南农业学报》
CSCD
2007年第3期412-416,共5页
Southwest China Journal of Agricultural Sciences
基金
云南省烟草公司计划资助项目(合同名称:烟草主要病害抗药性调查及治理技术研究
编号:04A19)
关键词
烟草赤星病菌
菌核净
抗药性
Alternaria alternata
dimethachion
fungicide resistance
