40%砜吡草唑悬浮剂不同混配组合对大豆玉米带状复合种植区封闭除草的试验效果及作物安全性研究

Control Effects and Safety Evaluation of 40%Pyroxasulfone SC Mixed With Other Herbicides Against Weeds in Soybean-corn Strip Compound Planting Fields

大豆-玉米带状复合种植模式是在玉米不减产的前提下,扩大大豆的种植面积,是一条增收大豆的有效途径。此种种植模式下,混生的杂草在一定程度上给化学除草时选择除草剂带来难度,因此选择合适的除草剂对今后大面积推广带状复合种植具有重要意义。为了研究除草剂对杂草的防控效果和安全性,本试验选用40%砜吡草唑悬浮剂和其它药剂进行混配,在作物播种后进行苗前封闭处理,来探讨对杂草的控制效果以及对作物的安全性。试验结果表明:40%砜吡草唑悬浮剂+48%嗪草酮悬浮剂(25 mL+40 mL),施药后15 d和30 d观察可知,该组合可有效防控大豆玉米带状复合种植田杂草,15 d的调查结果,防控效果为100%,30 d后防控效果>97%,且对两种作物无不良影响,可以作为今后大豆玉米种植田的苗前封闭处理的除草剂组合选项之一。

The soybean-corn strip compound planting has proven to enhance soybean planting area without compromising corn yield.However,the coexistence of gramineous and broadleaf weeds in this cropping system poses challenges when selecting appropriate herbicides.Therefore,the identification of suitable herbicides for widespread adoption is essential.To investigate the control effect and safety of herbicides,a field trial was conducted on combinations of 40%pyroxasulfone SC with other herbicides in Zoucheng city.The results showed that the treatment of 40%Pyroxasulfone SC(25 mL)+48%metribuzin SC(40 mL)after 15 and 30 d had the best control effect on weeds.The control effect reached 100%after 15 d and remained more than 97%after 30 d.Furthermore,this herbicide combination had no adverse effects on soybean and corn.Consequently,it can be used to control the weeds in the soybean-corn strip compound planting area in the future.