2,4-滴类药剂防除麦田阔叶杂草的初步研究

Preliminary Study on 2,4-D Reagent in Chemical Control Broadleaf Weeds in Wheat Field

采用室内盆栽喷雾法和田间茎叶喷雾处理法,研究了2,4-滴类除草剂防除麦田杂草的应用技术。室内活性试验结果表明,2,4-滴类药剂对麦田杂草的除草活性由高到低依次顺序为:460g/L 2,4-滴.麦草畏水剂>304 g/L 2,4-滴.毒莠定水剂>720 g/L 2,4-滴二甲胺盐水剂>2,4-滴酸原药>50%2,4-滴异辛酯乳油。田间试验结果表明,同一药剂随着剂量的增加,除草效果显著提高,持效期可达45 d以上;2,4-滴类与麦草畏或毒莠定复配后不仅可以提高对阔叶杂草的防效,而且也可以降低单剂的使用量,扩大杀草谱。

The application technology of the 2,4-D herbicides controlling of weeds in wheat fields was studied by indoor pottered spray method and field stem leaf spray processing method. The experimental results of indoor activity showed that the order of herbicideal activity on weeds in wheat fields was as follows： 460 g/L 2,4-D ＋ dicamba AS 〉 304 g/L 2,4-D ＋ picloram AS 〉 720 g/L 2,4-D dimethyl amine salt AS 〉 98.0% 2,4-D TC 〉 50% 2,4-D-ethylhexyl EC. The field test results showed that the weeding effect of same agent was obviously improved as the dose increased, the duration was up to more than 45 days. Mixing 2,4-D and dicamba or pieloram can not only improve the efficacy on broadleaf weed, but also reduce the usage of single agent, and expand the weed control spectrum.