Confirmation and Control of Propanil-Resistant and Quinclorac-Resistant Barnyardgrass (Echinochloa crus-galli) in Rice
Confirmation and Control of Propanil-Resistant and Quinclorac-Resistant Barnyardgrass (Echinochloa crus-galli) in Rice
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DOI：
10.1614/wt-09-053.1
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发表时间：
2010-07-01
期刊：
影响因子：
1.4
通讯作者：
Talbert, Ronald E.
中科院分区：
文献类型：
--
作者：
Malik, Mayank S.;Burgos, Nilda R.;Talbert, Ronald E.
敌稗和二氯喹啉酸重复使用的强烈选择压力导致了除草剂抗性稗草生物型的进化。在2002年和2003年，对22个复合田间样品进行了抗性水平测试，并在2002年和2003年在阿肯色州斯图加特的水稻研究和推广中心进行了田间研究，以评估替代水稻除草剂来控制敌稗抗性（PR）和二氯喹啉酸抗性（QR）稗草。在22个复合样品中，4个是PR（30%至40%的控制）; 4个具有PR、QR和敏感（S）稗草的混合种群; 2个对敌稗和二氯喹啉酸（P/QR）具有多重抗性，敌稗的控制为15%至30%，二氯喹啉酸的控制为5%至10%。“威尔斯”水稻用于评价常规除草剂方案，而克利尔菲尔德水稻“CL-161”（咪唑啉酮抗性）用于涉及咪草烟的除草剂方案。所有PR和QR稗草通过替代除草剂控制> 90%，包括所有出苗前（PRE）和延迟出苗前（DPRE）处理。在出苗后56天（DAE），将氰氟吡禾灵或精恶唑禾草灵施用于二至三叶稗草（出苗后早期[EPOST]），然后（fb）在洪水前施用，控制稗草> 93%。二甲戊灵控制PR稗草21 DAE，但不是整个赛季。相反，在克利尔菲尔德水稻中，咪草烟在整个季节100%控制所有禾本科杂草。在四至五叶期施用出苗中期（MPOST）双啼苯甲酸还提供了对所有稗草生物型的季节性控制（> 88%，56 DAE）。常规除草处理的水稻产量为5，300至5，700公斤/公顷，而咪草烟处理的水稻产量为2，800至5，000公斤/公顷。未经处理的地块产量为1，500公斤/公顷。
Intensive selection pressure from repeated use of propanil and quinclorac led to the evolution of herbicide-resistant barnyardgrass biotypes. Twenty-two composite field samples were tested for level of resistance in 2002 and 2003, and field studies were conducted at the Rice Research and Extension Center, Stuttgart, AR, in 2002 and 2003 to evaluate alternative rice herbicides to control propanil-resistant (PR) and quinclorac-resistant (QR) barnyardgrass. Of the 22 composite samples, four were PR (30 to 40% control); four had a mixed population of PR, QR, and susceptible (S) barnyardgrass; and two had multiple resistance to propanil and quinclorac (P/QR), with control from propanil of 15 to 30% and control from quinclorac of 5 to 10%. 'Wells' rice was used where conventional herbicide programs were evaluated, and Clearfield rice 'CL-161' (imidazolinone-resistant) was used for herbicide programs involving imazethapyr. All PR and QR barnyardgrass were controlled > 90% by alternative herbicides, including all preemergence (PRE) and delayed preemergence (DPRE) treatments. By 56 d after emergence (DAE), cyhalofop or fenoxaprop applied to two- to three-leaf barnyardgrass (early postemergence [EPOST]), followed by (fb) a preflood application, controlled barnyardgrass > 93%. Pendimethalin controlled PR barnyardgrass 21 DAE, but not all season long. In contrast, imazethapyr in Clearfield rice controlled all grass weeds 100% all season long. Midpostemergence (MPOST) bispyribac application at the four- to five-leaf stage also provided season-long control of all barnyardgrass biotypes (> 88%, 56 DAE). Rice yields ranged from 5,300 to 5,700 kg ha(-1) in conventional weed-control treatments and from 2,800 to 5,000 kg ha(-1) in imazethapyr-treated plots. Nontreated plots yielded 1,500 kg ha(-1).