2013年10月22日星期二

You can choose according to herbicide weed species

Plant Protection Station , Jiangsu Province , according to survey data , the local weed has 15 families and 27 species of heavy damage to wheat are: A.aequalis hard grass , bluegrass ,bottle sprayer wild oats, ryegrass , cleavers , Fan branches, vetch , shepherd's purse, sophia , speedwell , buddha seat, Euphorbia , pure rice chestnut , Cephalanoplos and reed . We can simply put these weeds and broadleaf weeds are divided into two major categories of weeds .

Control weeds can choose: Chlortoluron , isoproturon , acetochlor, fenoxaprop , metsulfuron methyl , etc. . Because different weed populations sensitive to these different responses herbicides , therefore the choice of the medicine should be further refined.

Such as: to see the wheat straw, wild oat -based plots , you can choose fenoxaprop be controlling . Alkyne oxalic acid spectrum herbicide fenoxaprop slightly wider than some , better than weeding Fenoxaprop , 4-6 grams per acre effective content in the case of controlling before winter ryegrass , hard difficult to control grass weeds ; chlorotoluron and isoproturon can effectively control the majority of annual grass weeds and some broadleaf weeds , especially isoproturon wheat variety is still the current controlling weeds preferred pharmacy .

Broadleaf weeds in wheat fields more types of herbicides is also more appropriate , it should be selected according to the specific weed communities .

Currently registered broadleaf weeds in wheat herbicide varieties: tribenuron , thifensulfuron , Bensulfuron , A , chlorsulfuron ( because A , chlorsulfuron in PH> 7 slow decomposition in soil residual injury heavier, dry area north of the Yangtze disabled ) MCPA ,2.4-D butyl ester , fluroxypyr , Fluoroglycofen ethers, ketones azole grass , grass amine sulfonamide double fluoride . Tribenuron which is still headed varieties , knapsack power sprayer in order to expand the spectrum herbicide , improve the speed and weeding weeding effect , often using complex methods . Such as controlling cleavers , speedwell , sophia , shepherd's purse , etc. Optional: tribenuron + Fluoroglycofen ether ; grass tribenuron + yl ketone ; chlorofluorocarbons than Acetic Acid + MCPA and so on.

Control in Noe stork, Mak public , Vetch , chickweed , etc. Optional: fluroxypyr + MCPA ; azole metribuzin + MCPA and so on.

There are three yuan compounding agents such as azole oxadiazon + tribenuron + MCPA can basically controlling broadleaf weeds in wheat fields in all .

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