摘要
在施用甲磺隆的抗性观察圃里 ,跟踪调查杂草的抗性生物型 ,采集表现抗性的杂草———少花龙葵和三叶鬼针草种子 ,用生物测定和生化分析方法 ,进行其抗性水平测定。结果表明 ,连续 2年 4次施用甲磺隆的少花龙葵和三叶鬼针草 ,只有少花龙葵表现抗性 (抗性因数为 2 19,等浓度防效降低 2 9% ,敏感性比为 1 5 8,乙酰乳酸合酶的活性比为 1 6 1)。
In the survey plot applied with metsulfuron methyl, the weed resistant biotypes were surveyed by following their tracks, Resistance levels of shiningfruit nightshade ( Solanum photeinocarpum Nakai et Odash.) and railway beggarticks ( Bidens pilosa L.), the weed species showing resistance, were determined by bioassay and biochemical analysis, The result has shown that with 4 times of the metsulfuron methyl application in 2 successive years only the shiningfruit nightshade showed resistance (resistancefactor=2.19; controlling effect at a given same concentration reduced by 29%; susceptibility ratio=1.58; activity ratio of acetolactate synthase (ALS)=1.61); differences of resistance in railway beggarticks being unapparent.
出处
《云南农业大学学报》
CAS
CSCD
2000年第2期115-118,共4页
Journal of Yunnan Agricultural University
基金
云南省自然科学基金!(96C117M)资助
关键词
甲磺隆
抗性观察
苗圃
少花龙葵
三叶鬼针草
Metsulfuron methy
Shiningfruit nightshade( Solanum photerinocarpum Nakai et Odash.)
Railway beggarticks( Bidens pilosa L.)
Resistance biotype
Acetolactate synthase
