Be the crucial period that weeds after corn young plant at present, a lot of real student gives us response, weed with herbicide sometimes, the result is bad, a lot of grass are hit not dead, some hitting after dying partly, still can delay comes over, return a responsibility how after all? The factor that affects corn herbicide result actually has a lot of, friend of a lot of farmer thinks corn weeds very simple, it is OK that the medicine that buy a place smokes a time to be hit, actually, this kind of practice is be a mistake, major case is white beautiful money, cannot rise to destroy careless effect, take time is arduous costly, although everybody all the year round cultivate land, use drug year after year, but a lot of people are in choose herbicide and herbicide to use the error with the very much existence on the method, cause money to do not have little flower, medicine to was not hit less, its accuse grass, weed the effect however very not ideal, unscientific place creates the means that because of everybody herbicide uses, method this.
Weed the main reason with bad result
The likelihood uses drug incorrect disease. Herbicide has specific aim, every kinds of pesticide has destroy certainly reduce fireweed scope, if the herbicide of the choice is incorrect disease, affirmative short of weeds the effect; With dosage insufficient. The dosage of herbicide of a lot of farmer is more optional, cannot deserve strictly to compare medical fluid according to pesticide manual, density of the drug when dispensation is lower, bring about weed the effect not beautiful; Buy inferior expire pesticide. Content of bought herbicide active ingredient is insufficient, or herbicide has missed medical effect period, after drug gush is applied, cannot achieve anticipate weed the effect; The opportunity that use drug holds bad. Period as it happens weeding after the seedling is northeast Chun Xiazhi hand in, right now northeast area appears easily fresh gale weather, bring about medical fluid drift easily. Also be the period with more rain right now, heavy rain is received after gush medicine, also can affect weed the effect; Join other material at will. Have friend of a lot of farmers a few more credulous small folk prescription or small doohickey, a few material are joined to heighten medical effect when gush medicine, for example washing powder, derv, teacher of a lot of expert thinks this is unscientific, belong to acidity because of affiliation better substance, meet and reduce medical effect; Fireweed leaf mountain range is too big. As a result of early days all sorts of reasons, cannot make in time weed after the seedling, wait for the ability when fireweed leaf mountain range is too big to use drug, right now fireweed can arise to fight a gender certainly to herbicide, right now gush medicine short of weeds the effect.
How to improve the result that weeds after the seedling?
Want to achieve first-rate to weed the effect, we want the medical effect characteristic of the sort in grass of be intermingled of accurate recognize cropland and herbicide above all, have the right choice herbicide of specific aim. When buying pesticide accordingly, must seek advice from farming ability personnel or pesticide sale personnel, the fireweed him Tian Li clear, buy corresponding pesticide again; Should buy 3 certificate to normal pesticide inn more certainly all ready, agriculture chemical that quality assures, and the active ingredient content that must see herbicide and expiration period; When gush medicine must mix add pesticide strictly according to service instruction, do not change the chroma of herbicide at will, had better choose attenuant magic art 2 times, also cannot privately joins other material; Must notice weather changes before gush medicine, escape gale day, wet, air temperature crosses low weather; When gramineous age is too big, fireweed is right of chemical herbicide fight a gender bigger, weed the effect is very finite, do not want right now again gush uses agriculture chemical, can adopt the means that weeds artificially to weed.
