Application of pyroxasulfone 40% SC against weeds in wheat field
彭静澜 1刘昱彤 2刘乐 2吴平2
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作者信息
1. 湖南省农业信息与工程研究所,长沙 410125
2. 湖南华都农业科学有限责任公司,长沙 410129
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摘要
为明确 40%砜吡草唑悬浮剂在小麦田的应用技术,采用土壤喷雾法评价 40%砜吡草唑悬浮剂对小麦田杂草的防除效果及对小麦的安全性.结果表明:40%砜吡草唑悬浮剂对小麦田杂草具有较好的防效,持效期达 120 d以上,对禾本科杂草的防效优于对阔叶杂草的防效.施药后 120 d,40%砜吡草唑悬浮剂150～360 g a.i./hm2对禾本科杂草看麦娘和菵草的株防效和鲜重防效均大于 95%,对阔叶杂草荠菜和牛繁缕的株防效分别为 90.1%～96.3%和80.4%～85.5%,鲜重防效分别为93.6%～95.4%和 83.2%～88.4%.40%砜吡草唑悬浮剂 150～360 g a.i./hm2 对小麦出苗和生长安全,对小麦增产明显,增产率为 16.3%～17.5%.40%砜吡草唑悬浮剂是防除小麦田杂草的优良除草剂,推荐施用剂量为 150～180 g a.i./hm2,适宜施用时期为小麦播种后出苗前.
Abstract
To determine the application of pyroxasulfone 40%SC in wheat field,experiment was conducted to evaluate the control efficacy of pyroxasulfone 40%SC against weeds and its safety to wheat.The results showed that pyroxasulfone 40%SC had good control efficacy against weeds in wheat field,and the control efficacy on gramineae weeds was better than that on broad-leaved weeds,and the effect lasted for more than 120 days.At 120 days after application,the plant control efficacy and fresh weight control efficacy of pyroxasulfone 40%SC applied at 150-360 g a.i./ha on Alopecurus aequalis and Beckmannia syzigachnewere more than 95%.The plant control efficacy on Capsella bursa-pastorisand Stellaria aquaticawere 90.1%-96.3%and 80.4%-85.5%respectively,and the fresh weight control efficacy were 93.6%-95.4%and 83.2%-88.4%,respectively.Pyroxasulfone 40%SC applied at 150-360 g a.i./ha was safe for wheat emergence and growth,and increased the wheat yield by 16.3%-17.5%.Pyroxasulfone 40%SC is an excellent herbicide to control weeds in wheat field,the recommended dosage is 150-180 g a.i./ha,and the suitable application period is before emergence of wheat after sowing.
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