期刊论文详细信息
Planta Daninha
Resistance of Raphanus raphanistrum to the herbicide metsulfuron-methyl
L.o. Costa1  M.a. Rizzardi1 
[1] ,Universidade de Passo FundoPasso Fundo RS ,Brasil
关键词: acetolactate synthase;    dose-response;    weed;    resistance factor;    acetolactato sintase;    dose-resposta;    planta daninha;    fator de resistência;   
DOI  :  10.1590/S0100-83582014000100020
来源: SciELO
PDF
【 摘 要 】

The ALS-inhibiting herbicides, especially metsulfuron-methyl, are widely used for weed control, mainly wheat and barley in southern Brazil. Raphanus raphanistrum is a major weed of winter crops. However, in recent years, R.raphanistrum, after being treated with metsulfuron, has shown no symptoms of toxicity, possibly due to herbicide resistance. Aiming to evaluate the existence of R.raphanistrum biotypes resistant to metsulfuron, an experiment was conducted in a greenhouse, in a completely randomized design with four replications. The plots consisted of pots with six plants. The treatments consisted of the interaction of resistant R. raphanistrum (biotype R) and susceptible R. raphanistrum (biotypes S) with ten doses of the herbicide (0.0; 0.6; 1.2; 2.4; 4.8; 9.6; 19.2; 38.4; 76.8 and 153.6 g i.a. ha-1). The application of the test herbicides occurred when the crop was at the stage of 3 to 4 true leaves. The variables analyzed were control and dry matter accumulation. Statistical analysis of dose-response curves was performed by non linear regression. Biotype S was susceptible to the herbicide even at doses below the recommended. Biotype R was insensitive to the herbicide obtaining values of resistance factor (F) higher than 85. The dose-response curve confirmed the existence of R. raphanistrum biotypes with high level of resistance to metsulfuron-methyl.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

【 预 览 】
附件列表
Files Size Format View
RO202005130075695ZK.pdf 295KB PDF download
  文献评价指标  
  下载次数:11次 浏览次数:13次