In the manufacturing customarily of friend of a lot of farmers, it is in rain junior travel Miao Qianfeng is shut weed, but as a result of northeast this year area long arid, so that weed before a lot of zone young plants,cannot carry out normally. Drought already passed now, corn young plant also begins to sprout, but appear at the same time of the ground still have rank grass, so, weed after the seedling this year than in former years more important.
But as a result of, the corn emerge delay that drought causes this year, so, to weeding after the seedling, everybody is cultivated door want to know, we cannot have borne any losses, how does use ability accomplish the herbicide after so we must want to understand a young animal correctly not to hurt a young plant and the effect is good.
Weed time wants to be opposite
Actually first-rate weeds time is Miao Qian of course, before fireweed has not come up out of land, but had missed optimal time apparently this year, if weeding to be over, fireweed has come up out of land more than 3 leaves period, at this moment herbicide drug effect can be reduced, so the expert suggests, optimal period weeding after corn young plant is in corn 3-5 foliaceous period of foliaceous period and fireweed 1-3.
Drug dosage is measurable
Not little farmer friend has a few bad habits, namely not according to dispensation of operation instruction handbook, always think medical effect will be better chroma is big a little bit, perhaps be in the place with concentrated fireweed much gush a few wait behavior a moment. But regular meeting of classics of this kind of practice causes dosage to produce medicine to kill greatly too. So everybody is sure to keep in mind to must be used according to the manual, cross congress to cause medicine to kill, chroma removes less than weeding not quite the effect.
Edaphic soil moisture content is close friends
The use of herbicide is taller to requirement of soil moisture content, if edaphic water content is higher, oh herbicide forms medical film very easily in edaphic surface layer, fireweed and medical film can be contacted very quickly and absorb play effect. If edaphic soil moisture content is bad, soil is drier, after gush applies herbicide be absorbed very quickly by soil or the moisture of medical fluid volatilizes very easily, cannot assure medical fluid active ingredient diffuses officinal film, weed with respect to what cannot obtain ideal the effect. So, must make sure soil is wet before the use of herbicide degree, carrying out experience is medicine of the gush after best rain weeds. But also cannot pass in heavy rain hind field seeper when with medicine, otherwise drug can be reduced by dilute medical effect.
Drug choice is right
Herbicide of avery kind of has the certain music that kill grass, have destroy of natural disposition, have alternative, want the main variety according to crop sort and fireweed above all, choose effective herbicide. Want to choose herbicide according to plowing a system next. Be like giant star, 2 armour 4 chloric, fasting horses, can fall in a variety of each plant systems weed, but green sulphur grand, armour sulphur grand, can make the cornfield below the system use in paddy Mai Lun only, the stubble after be like is corn, soja to wait, can appear different drug kills a symptom. In addition, notice to mix even, alternant use herbicide. Use continuously as a result of akin herbicide old, easy bring about sensitivity fireweed drop off, fight be able to bear or endure fireweed of property of a medicine rises, accordingly, herbicide should mix use and use alternately between year, ability achieves the goal that long-term control grass kills.
Weather sees before using drug
The use of herbicide is more sensitive also to weather situation, need to undertake in calm weather. If encounter fresh gale weather, can make drug follows wind drift, the place that need weeds does not have the medicine on gush, the place that did not grow fireweed can have drug to wave fall short of weeds purpose, even some plot already gush medicine, wave along with wind falling drug can make corn causes medicine 2 times to kill with medicine. Herbicide is used also have a demand to temperature, general 5 ℃ left and right sides can be used, but inferior drug effect develops temperature not ideal, the temperature with medical best effect is 13, 27 ℃ , water of fluid of 30 ℃ medicine divides prep above to evaporate easily, medical fluid chroma increases corn seedling to produce medicine easily to kill. The need before weeding so sees air temperature.
Herbicide is used undeserved produce medicine very easily to kill to corn, the technology that must notice gush medicine weeds after the seedling so, as far as possible ground of press close to sprays, avoid to spray on corn leaf.
