生物灾害科学2025，Vol.48Issue(2)：174-180,7.DOI:10.3969/j.issn.2095-3704.2025.02.23
500g/L砜吡草唑悬浮剂对玉米田一年生杂草的防除效果
Efficacy of pyroxasulfone 500 g/L suspension concentrate on annual weeds in maize fields
摘要
Abstract
[Objective]This study was conducted to clarify the weed control efficacy of pyroxasulfone 500 g/L SC against annual weeds in maize fields,thereby providing technical guidance for the weed management by using pyroxasulfone in maize fields.[Method]Field plot efficacy trials were conducted by using pre-emergence soil spray treatment after sowing.[Result](1)At a dosage of 150～210 g a.i./hm2,the pyroxasulfone 500 g/L SC achieved control efficacy of 89.6%～96.9%on the total weed density(including Echinochloa crus-galli,Digitaria sanguinalis,Amaranthus retroflexus,Abutilon theophrasti,and Chenopodium album)at 20 days after treatment(DAT),significantly outperforming the control herbicide.(2)At 40 DAT,the control efficacy on weed density and fresh weight were 87.8%～95.8%and 87.5%～95.9%,respectively,both significantly superior to the control herbicide.(3)At 7,14,and 28 DAT and before harvest,the phytotoxicity rating on maize was consistently 1.0,with no significantly observed damage.Compared to manual weeding plots,the yield increase ranged from 1.73%to 4.17%,while compared to untreated control plots,the yield increase was 65.5%to 74.0%.[Conclusion]The pyroxasulfone 500 g/L SC effectively controls weeds in maize fields and demonstrates excellent crop safety.关键词
砜吡草唑/玉米田/杂草/防效/安全性Key words
pyroxasulfone/maize field/weed/efficacy/safety分类
植物保护学引用本文复制引用
王友定,刘晓晨,范富云,王宇钰,窦婷婷,韩旭,武新新,鲍丽,毕亚玲..500g/L砜吡草唑悬浮剂对玉米田一年生杂草的防除效果[J].生物灾害科学,2025,48(2):174-180,7.基金项目
安徽省科技重大专项(202203a06020016) （202203a06020016）
