摘要
为合理防治烟草黑胫病,减少抗药性产生,从云南省6个地州分离烟草黑胫病菌菌株34个,就分离菌株对甲霜灵的抗药性进行了测定,结果表明,供试34个菌株中中高抗菌株12个,中抗菌株比例较高5个,低抗菌株17个。不同来源的烟草黑胫病原菌株的抗药性存在差异,以文山、玉溪的菌株抗药性最高,昭通、曲靖菌株抗药性最低,抗性倍数最高达16倍,其余地州抗药性居中。不同地州分离菌株高、中、低抗菌株的比例存在明显差别。分离自楚雄双柏县雨龙乡的113#菌株抗药性最强,来自大理巍山县大仓镇的218#菌株抗药性最低。34株烟草黑胫病菌菌株对甲霜灵的EC50值平均为0.0148μg/ml,范围在0￣0.053μg/ml。
To control tobacco black shank disease rationally, reduce resistance, 34 strains of Phytophthora parasltica vat. nicotianae were isolated from 6 region of Yunnan province and all isolates were determined their resistance to metalaxyl. The results indicated that of all tested isolates, there were 12 high resistance, 5 middle resistance and 17 low resistance isolates respectively. The islates fungicide resistance from differ- ent region was different obviously, the highest resistant isolate come from Wenshan and Yuxi region, Zhaotong and Qujing isolates had the lowest resistance among all tested isolates. The evident disparity of highresistance, mid-resistance and low-resistance isolates ratio was exist at different region. 113# from Chuxlong Shuangbai was the highest metalaxyl resistant isolate,and the lowest resistance isolate 218# come from Weishanof Dali. The EC50 of 34 Phytophthora parashica var. nicotianae isolates against metalaxyl was 0.0148μ g/ml in average, was in the range of 0-0.053μg/ml.
出处
《中国农学通报》
CSCD
2006年第9期377-379,共3页
Chinese Agricultural Science Bulletin
基金
云南省烟草公司计划资助项目"烟草主要病害抗药性调查及治理技术研究("04A17)
关键词
烟草黑胫病
甲霜灵
抗药性
Tobacco black shank disease, Metalaxyl, Fungicide resistance
