對(duì)多花黑麥草、雀麥、播娘蒿、日本看麥娘的株防效和鮮重防效分別為 94.42%.88.25%.93.93%.97.65% 和 97.64% 、92.45% 95.95% 98.15% ，顯著高于 30% 吡氟酰草胺SC 150g a.i. /hm<sup>2</sup> ；對(duì)繁縷和豬殃殃的防效分別為94.93% （204號(hào) ,91.30% 和 97.28% 、93. 78% ，顯著高于 40% 砜吡草唑SC 180g a.i. /hm<sup>2</sup> 的防效。該藥劑不同劑量在河南和安徽2地的增產(chǎn)率為 35.73% 、41. 68% 、 44.22% （河南）和 38.60%.43.92%.47.32% （安徽），優(yōu)于40% 砜吡草唑SC 180g a. i. /hm<sup>2</sup> ） 30% 吡氟酰草胺S C150ga.i./hm<sup>2</sup> 的增產(chǎn)效果。在 35% 礬吡草唑·吡氟酰草胺 <img src="/qkimages/zckx/zckx202502/zckx20250210-2-l.jpg" with="83px" style="vertical-align: middle;"> a.i./ ?hm<sup>2</sup> 和 30% 吡氟酰草胺S C150ga.i./hm<sup>2</sup> 處理下，部分小麥出土后第1張葉片出現(xiàn)褪綠或白化癥狀，藥后 30d 恢復(fù)。綜上， 35% 砜吡草唑·吡氟酰草胺懸浮劑對(duì)小麥田主要雜草有良好的防除效果且對(duì)小麥安全，在小麥田雜草防除中具有開(kāi)發(fā)應(yīng)用前景。-龍?jiān)雌诳W(wǎng)" />

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35% 礬吡草唑·吡氟酰草胺懸浮劑對(duì)小麥田雜草的防效及其對(duì)小麥的安全性評(píng)價(jià)

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Weed Control Effects of Pyroxasulfone ? Diflufenican 35% SC and Its Selectivity Assessment to Wheat in Fields

MIN Xiangfen，LI Sheng，SUN Mingshuai，ZHAI Tingting （Hailir Pesticides and ChemicalsGroup Co. Ltd，，Qingdao 2661O9，China）

Abstract：In2O23，fieldtrialswereconductedinHenanandAnhuiProvincestoevaluatetheeficacyandselectivityof pyroxasulfone ·diflufenican 35% SC in controlling weeds.The results demonstrated that pyroxasulfone ·diflufenican 35% SCat250g a.i./hm 2 achieved plant and fresh weight control effects of 94.42%，88.25%，93.93%，and （204號(hào) 97.65% and 97. 64% ，92. 45% ，95. 95% ，and 98. 15% against Lolium multiflorum Lamk.，Bromus japonicus Thunb.，Descurainia sophia（L.）Webb ex Prantl，and Alopecurus japonicus Steud.，respectively，which were significantly higher than those of diflufenican 30% SC at 150ga.i./hm2 against these four weeds. It also showed that control effects of 94.93% 91.30% and 97.28% ， 93.78% onStellaria media（L.）Vill. and Galium spurium L.， respectively，significantly surpassing the effects of pyroxasulfone 40% SCat 180ga.i./hm2 ．Theyield increased at different dosages of this herbicide were 35. 73% ，41. 68% ，and 44.22% in Henan，and 38.60%，43. 92% ，and （20 47.32% inAnhui，outperforming the yield increases achieved with pyroxasulfone 40% SC at 180 g a. i./hm2 and diflufenican 30% SC at 50g a.i./hm2．Pyroxasulfone·diflufenican 35% SC at 250，500 ga.i./hm2and flufenacet 30% SC at 150 ga.i./hm2，some wheat exhibited chlorosis oralbinism on the first emerged leaf，which recovered 30 days after treatment. In conclusion，pyroxasulfone·diflufenican 35% SC had excellent control effects on the main weeds in wheat fieldand was selectivitytowheat and showed promising potentialfordevelopmentandapplication in weed control in wheat fields.

Key words： pyroxasulfone;diflufenican;weeds in wheat fields;field trial

小麥?zhǔn)俏覈?guó)重要的糧食作物之一，其種植面積占糧食總種植面積的 22% 左右，產(chǎn)量占糧食總產(chǎn)量的 20% 以上，在我國(guó)糧食種植中占有重要地位[1]。（剩余6985字）

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