【摘要】 为有效防治黄淮海麦田杂草猪殃殃Galium aparine，采用整株剂量响应法测定黄淮海小麦主产区河南、山东、江苏和安徽4个省麦田内28个猪殃殃种群对双氟磺草胺的抗性水平，并测定12个种群对另外10种除草剂及其复配剂的敏感性，基于敏感性测定结果，选取4种高效药剂进行田间药效试验验证。结果显示：除AH-9种群外，其他27个猪殃殃种群均对双氟磺草胺产生了抗性，抗性指数介于1.2～775.5之间，种群间抗性水平差异显著。氯氟吡氧乙酸、2甲4氯钠、唑草酮、2甲·唑草酮和双唑·氯氟吡5种除草剂对12个猪殃殃种群的室内鲜重防效均在90.0%以上；而苯磺隆、啶磺草胺、环吡氟草酮、双唑草酮和异丙隆的防效较差，鲜重防效均低于83.0%。在田间唑草酮和2甲·唑草酮对猪殃殃和播娘蒿Descurainia sophia均表现出较好的防效；药后100 d,2甲·唑草酮对小麦田杂草的总株防效为90.8%～97.1%，总株鲜重防效为90.1%～96.3%；唑草酮对小麦田杂草的总株防效为86.0%～95.8%，总鲜重防效为81.8%～94.7%，其总体防效略低于2甲·唑草酮。表明黄淮海部分区域麦田猪殃殃已普遍对双氟磺草胺产生抗性；唑草酮和2甲·唑草酮对田间抗性猪殃殃种群防治效果良好，具有推广应用价值。更多还原

【Abstract】 To effectively control cleaver Galium aparine in wheat fields of the Huang-Huai-Hai region,the florasulam resistance levels of 28 G. aparine populations collected from major wheat-producing areas in Henan, Shandong, Jiangsu, and Anhui provinces were determined using the whole-plant doseresponse assay. Additionally, the sensitivity of 12 populations to ten other herbicides and their combinations was evaluated. Based on the sensitivity test results, four highly effective herbicides were selected for field efficacy trials. The results showed that 27 out of the 28 G. aparine populations(excluding AH-9)exhibited resistance to florasulam, with resistance indices ranging from 1.2 to 775.5, indicating significant variation in resistance levels among populations. In laboratory bioassays, five herbicides fluroxypyr, MCPA-sodium, carfentrazone-ethyl, MCPA-sodium+carfentrazone-ethyl, and bipyrazone+fluroxypyr exhibited excellent fresh weight control efficacy(>90.0%) against 12 tested G. aparine populations.In contrast, tribenuron-methyl, pyroxsulam, cypyrafluone, bipyrazone, and isoproturon showed poor efficacy, with fresh weight control rate lower than 83.0%. Field trials demonstrated that both carfentrazone-ethyl and the mixture MCPA-sodium+carfentrazone-ethyl provided effective control against both G. aparine and flixweed(Descurainia sophia). At 100 days after treatment(DAT),MCPA-sodium+carfentrazone-ethyl achieved 90.8%-97.1% control efficacy of total weed density and 90.1%-96.3% control efficacy of total weed fresh weight biomass. Carfentrazone-ethyl alone provided 86.0%-95.8% control efficacy of total weed density and 81.8%-94.7% control efficacy of total fresh weight biomass, with its overall efficacy slightly lower than that of the mixture. These findings indicate that resistance to florasulam has become widespread in G. aparine populations within parts of the Huang-Huai-Hai wheat-growing region. Both carfentrazone-ethyl and the mixture MCPA-sodium+carfentrazone-ethyl demonstrated excellent efficacy against field-resistant G. aparine populations, showing their significant potential for practical application.更多还原