二氯异噁草酮与3种封闭除草剂混用对多花黑麦草的协同作用  

Synergistic effects of bixlozone in combination with three pre-emergence herbicides on Italian ryegrass(Lolium multiflorum)

作　　者：吴仁海[1] 义珊池 徐洪乐[1] 孙兰兰[1] 苏旺苍[1] 薛飞[1] 鲁传涛[1] WU Renhai;YI Shanchi;XU Hongle;SUN Lanlan;SU Wangcang;XUE Fei;LU Chuantao(Institute of Plant Protection,Henan Academy of Agricultural Sciences,Henan Key Laboratory of Crop Pest Control,Zhengzhou 450002,China)

机构地区：[1]河南省农业科学院植物保护研究所,河南省农作物病虫害防治重点实验室,郑州450002

出　　处：《植物保护》2025年第1期297-303,共7页Plant Protection

基　　金：河南省重点研发专项(221111112300);河南省级科技研发计划联合基金(222301420110);河南省农业科学院科技创新团队专项(2024TD12)。

摘　　要：为寻找多花黑麦草高效防治药剂,室内研究了二氯异噁草酮与吡氟酰草胺、砜吡草唑、氰草津混用对多花黑麦草的协同作用。室内盆栽试验结果表明,二氯异噁草酮、吡氟酰草胺、砜吡草唑、氰草津对多花黑麦草的GR 50分别为25.80、63.80、2.00、291.75 g/hm^(2),GR 90分别为101.84、1065.95、10.78、1007.19 g/hm^(2)。二氯异噁草酮与吡氟酰草胺混配比例为1∶0.6、1∶0.8、1∶1、1∶1.2、1∶1.4时,其共毒系数(CTC)分别为122.19、133.69、103.15、144.74、179.43,表现出相加或增效作用,其中以1∶1.4的比例混配对防治多花黑麦草的增效作用最优;砜吡草唑和二氯异噁草酮混配比例为1∶0.6、1∶0.8、1∶1、1∶1.2、1∶1.4时,其CTC分别为115.22、156.62、127.14、157.41、183.64,表现出增效或相加作用,其中以1∶1.4的比例混配对防治多花黑麦草的增效作用最优;二氯异噁草酮与氰草津混配比例为1∶1、1∶1.5、1∶2、1∶3、1∶4时,其CTC分别为28.23、25.67、27.70、27.63、30.58,表现出拮抗作用。以上结果表明,二氯异噁草酮与吡氟酰草胺或砜吡草唑合适比例混用具有增效作用,应用前景较好。To identify efficient herbicide combinations for controlling Lolium multiflorum,the synergistic effects of bixlozone mixed with diflufenican,pyroxasulfone,and cyanazine were evaluated in laboratory pot experiments.The results showed that the GR 50 of bixlozone,diflufenican,pyroxasulfone,and cyanazine were 25.80,63.80,2.00,and 291.75 g/hm^(2),and GR 90 were 101.84,1065.95,10.78,1007.19 g/hm^(2),respectively.When bixlozone and diflufenican were mixed in ratios of 1∶0.6,1∶0.8,1∶1,1∶1.2,and 1∶1.4,the co-toxicity coefficient(CTC)values were 122.19,133.69,103.15,144.74 and 179.43,respectively,demonstrating additive or synergistic effects,with the 1∶1.4 ratio providing the strongest synergistic effect on L.multiflorum.For pyroxasulfone and bixlozone mixtures at ratios of 1∶0.6,1∶0.8,1∶1,1∶1.2,and 1∶1.4,the CTC values were 115.22,156.62,127.14,157.41 and 183.64,indicating additive or synergistic effects,with the 1∶1.4 ratio being the most effective.The CTC values were 28.23,25.67,27.70,27.63,and 35.58,when bixlozone and cyanazine were combined at ratios of 1∶1,1∶1.5,1∶2,1∶3,and 1∶4,showing antagonistic effects.These results indicate that suitable ratios of bixlozone with diflufenican or pyroxasulfone produce synergistic effects and have promising applications for controlling L.multiflorum.

关 键 词：多花黑麦草 封闭除草剂 二氯异噁草酮 协同作用 

分 类 号：S482.49[农业科学—农药学]