Herbicide herbicide can choose to use the characteristics of the period

Chemical herbicides have different biological activity and herbicidal methods , therefore, must make good use of its features herbicides , in order to obtain the desired control effect .

Such as: acetochlor : amide herbicides to absorb coleoptile main control annual grass weeds and some broadleaf weeds in small grain seed , closed with a certain role . After sowing in wheat crop soil to stand needle enclosed use, the herbicidal effects influenced by soil moisture , drought conditions not conducive to the efficacy of the play , the herbicidal effect is poor, when the rain water in field after application when they prone to injury.

Isoproturon : herbicides , some of the main controlling grass weeds and some broadleaf weeds ( good effect on the chickweed ) , preemergence , postemergence can use , but early postemergence use works best. In wheat ( barley ) after sowing bud to 4 leaf stage . chemical sprayer Isoproturon efficacy of play is also affected by the impact of soil moisture , drought conditions using ineffective, postemergence than preemergence use .

Fenoxaprop , alkynyl oxalic acid , both foliar treatment agent , no closure effect, which can only be carried out after a homogeneous weed foliage treatment .

Tribenuron : herbicides , in order to absorb the main stem , the role of both closed , the main control broadleaf weeds in the 3-4 leaf stage of weed works best . Because of its dead grass is slower , in order to expand the spectrum herbicide , dead grass to improve the speed , multi- yl grass with ketones, MCPA ,2.4-D, Fluoroglycofen ether compound used .

Azole oxadiazon : leaf contact insecticide , no sucking conductivity, for the control of broadleaf weeds , when a large amount of wheat leaves burns phenomenon , dead grass fast, but weeding recur , and for chickweed , large nest vegetables less effective, with tribenuron , MCPA and other compound used in the 3-4 leaf stage of weeds best .

Glyphosate is the uptake and Herbicide . Can use its uptake, 5-7 days before the grain filling weed sprayer spraying , control wheat reed good effect, no influence on the grain filling .