| 我国南方稻区稗草对二氯喹啉酸的抗药性测定 |
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| 引用本文： | 李拥兵,吴志华,陈萱,刘洪斌,黄炳球.我国南方稻区稗草对二氯喹啉酸的抗药性测定[J].农药学学报,2003,5(4):88-92. |
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| 作者姓名： | 李拥兵 吴志华 陈萱 刘洪斌 黄炳球 |
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| 作者单位： | 1.湖南省农药检定所,湖南 长沙 410005 |
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| 摘 要： | 用琼脂法对2000年和2001年采收的29个稗草生态型对二氯喹啉酸的抗性水平进行了测定。结果表明:广东花都稗草对二氯喹啉酸最为敏感,其抑制中浓度IC50是0.148 0 mg/L;湖南安乡稗草对二氯喹啉酸的抗性极为明显,2000年和2001年样本IC50值分别是7.458和13.80 mg/L,其相对抗性比分别为50.4和93.2;2000年采收的湖南常德稗草也对二氯喹啉酸表现出高抗,其相对抗性比值是4.47,黄梅、汉寿、常德(b)、高桥4地稗草也表现出抗性,其相对抗性比值分别为2.37、3.12、2.44和2.20;其他22个稗草生态型对二氯喹啉酸仍未表现出抗性。
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| 关 键 词： | 稗草 二氯喹啉酸 抗药性 |
| 文章编号： | 1008-7303(2003)04-0088-05 |
Determination of Resistance of Echinochloa crus-galli to Quinclorac in the Rice Planting Areas of South China |
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| LI Yong-bing,WU Zhi-hu,CHEN Xuan,LIU Hong-bin and HUANG Bing-qiu.Determination of Resistance of Echinochloa crus-galli to Quinclorac in the Rice Planting Areas of South China[J].Chinese Journal of Pesticide Science,2003,5(4):88-92. |
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| Authors: | LI Yong-bing WU Zhi-hu CHEN Xuan LIU Hong-bin and HUANG Bing-qiu |
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| Institution: | 1.Institute for the Control of Agrochemicals, Hunan Province, Changsha 410127, China2.Laboratory of Insect Toxicology, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | The resistance of 29 Echinochloa crus-galli (barnyardgrass) biotypes to quinclorac collected from the rice planting areas of south China in 2000 and 2001 was determined. The results showed that the biotype collected from Gongdong Huadu was the most susceptible barmyardgrass to quinclorac, the quinclorac IC50 value (dose causing 50% reduction in shoot length) was 0.1480 mg/L, however, the biotypes collected from Hunan Anxiang in 2000 and 2001 were highly resistant to quinclorac, the quinclorac IC50 value was 7.458 and 13.80 mg/L, the resistance ratio was 50.4 and 93.2. The biotype collected from Hunan Changde in 2000 was also highly resistant to quinclorac, the resistance ratio was 4.47. The biotypes collected from Hubei Huangmei, Hunan Hanshou, Hunan Changde in 2001, Hunan Gaoqiao were medium resistant to quinclorac, the resistance ratio was 2.37, 3.12, 2.44, 2.20. The other 21 biotypes were still susceptible to quinclorac. |
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| Keywords: | Echinochloa crus-galli quinclorac resistance |
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