Wheat winter herbicide formula announced

Carrying out the prevention and control of weeds in wheat fields is a key measure and an important guarantee for increasing wheat yield and promoting stable grain income. Grasping the prevention and control of weeds before winter is especially important for achieving strong wintering. So, what medicine is used for weeding wheat? Today, Xiaobian talks about the difference in medications according to the type of weeding, and recommends some medicines.

With the adjustment of planting structure and high-yield cultivation techniques and the development of herbicides , the types and communities of weeds in wheat fields have evolved correspondingly, and they have developed towards a diverse, complex, malignant and difficult combination of grasses. Wild oats, section wheat, brome, wheat kernels, ryegrass, Japanese maiden, yarrow, big nest, miscanthus, hard grass, broken rice bran, rice leeks, pork broth, cattle Weeds such as cockroaches, wild geraniums, and mother-in-law, form new weed communities under natural ecological conditions and become malignant weeds.

Herbicide single-use and weed control techniques are not in place for a long time, leading to rapid development of weed resistance in wheat fields. The doses of bensulfuron-methyl, diflufenacil, and 2-methyl chloride were used to prevent the doses of swine fever, sown worm, maijiagong, and leeks from doubled, and the control effect decreased. The effects of the drugs such as oxazolene, clodinafop, and methyl disulfuron have been decreasing year by year. Antagonists such as clodinafop and oxazolamide have been prevented from forming a vicious circle with increasing dosage and poor control effect. The situation facing weeding in wheat fields is getting more and more serious. Xiaobian will recommend several safe and efficient single-type herbicides and herbicide combinations in the article.

Weeds in wheat field are generally emerged about 7 days after sowing of wheat. 14 to 30 days after sowing is the first peak of emergence before winter, and 70 to 110 days after sowing is the second peak of spring in the next year. The number of weeds before winter is 70% to 90% of the total.

1

Chemical control technology points one:

Control the mixed broadleaf weeds such as swine fever, sown wormwood, leeks, and lacquer. In the 3~5 leaf stage of weeds, use 9% bis-dioxazolone suspension (SC) active ingredient 20~27g/ Hectare (1 hectare equals 15 mu), or 12% chlorpyrazolone dispersible oil suspension (OD) active ingredient 72-90 g/ha, or 75% difluoro-bensulfuron WG active ingredient 33.75-45 Gram / hectare, or 20% difluoro-fluoroclay ester OD active ingredient 15 ~ 19.5 g / ha, stem and leaf spray.

Control mixed broadleaf weeds such as Po Po Na, Mai Jia Gong, Bao Gai grass, Miva pot, etc. In the 3 to 5 leaf stage of weeds, 29.5% benzoxazole chlorofluoropyrene wet powder (WP) active ingredient 97.35 was used. ~ 132.75 g / ha, or 8% clopyridazole / difluoro SC active ingredient 120 ~ 168 g / ha, or 48% 2 methyl chloride / difluoride suspension active ingredient 360 ~ 432 g / ha, stem and leaf spray .

Control the mixed grasses such as wild oats, buckwheat, wheat kernels, and ryegrass. In the weeds 2 to 3 leaf stage, use 24% acetylene ester water emulsion (EW) active ingredient 4.8-79.2 g / ha, or 7.5% acesulfame water dispersible granules (WG) active ingredient 0.55 ~ 14.06 g / ha, or 5% oxazolin (EC) active ingredient 45 ~ 60 g / ha, or 16% dioxin acetylacetoate WP active ingredient 48 ~ 57.6 g / ha, stem and leaf spray.

Control grass weeds and broadleaf weeds mixed weeds, in the 2 to 5 leaf stage of weeds, use 18% clopylopyrate SC active ingredient 108 ~ 135 g / ha, or 13% fluazole acetylene grass Ester OD active ingredient 58.5 ~ 78 g / ha, or 7% difluoro acetylene oxalic acid OD active ingredient 52.5 ~ 84 g / ha, or 60% fluazole oxadiazon WG active ingredient 36 ~ 45 g / ha, stem Leaf spray.

Precautions

1, wheat weeding is not recommended to use methyl disulfuron, acesulfame, acetochlor, isoproturon, poor safety;

2. Acetyl oxalate and oxazolin are avoided from mixing with hormonal herbicides;

3. The current use of oxazolin is only available in large wheat fields;

4. After the application of acesulfame, the wheat seedlings sometimes appear yellowing and seedlings, and the dosage should be strictly controlled;

5, oxalofenone only contact, should be applied after most of the weeds emerged.

2

Chemical control technology points 2:

For the grasses such as Mai Niang, Japan, Mai Niang, Valerian, and Bugs, in the 2 to 3 leaf stage of weeds, the active ingredient of 5% oxazolin ester EC is 45-60 g/ha, or 40%. The active ingredient of trimethyl oxaloacetone WG is 390-480 g/ha, or the active ingredient of 13% fluazole or acetyl oxalate is 58.5-78 g/ha, or the active ingredient of 5% oxazoline or acetylacetoate is 45-75 g/ Hectare, stem and leaf spray.

For the broad-leaved grasses such as swine fever, bovine vulgaris, big nest vegetables, and wild geranium, in the 3~5 leaf stage of weeds, 20% difluoro-fluorochloroester OD active ingredient 15~19.5 g/ha is used. Or 16% difluoro-chloroflupirin SC active ingredient 72 ~ 96 g / ha, or 48% 2 methyl chloride / difluoro SC active ingredient 360 ~ 432 g / ha, 38% chloropyrazolsulfonate WP active ingredients 114 ~ 171 g / ha, stem and leaf spray.

For grass weeds and broadleaf weed community weeds, in the weeds 2 to 5 leaf stage, 30% benzene sulfonate, WP active ingredient 67.5 ~ 90 g / ha, or 40% alkyne azole / chlorine Fluoride WP active ingredient 90 ~ 120 g / ha, or 13% difluoro acetylene oxalic acid OD active ingredient 58.5 ~ 84 g / ha, or 37% alkyne benzyl oxafluridone WP active ingredient 111 ~ 166.5 g / ha Stem and leaf spray.

Precautions

1. Promote pre-winter application and reduce the weed base;

2. Low-medium amount of medicinal application before winter, medium-quantity amount of medicinal application in spring;

3. It is forbidden to apply medicine after wheat jointing;

4. It should be applied when the temperature is higher than 10 °C during the day. It is not suitable to apply in drought, low temperature (<5 °C) and windy weather.

3

Chemical control technology points three:

To see weeds in the population of Mai Niang, Japan, Mai Niang, Hard Grass and Poa, in the 2 to 3 leaf stage of weeds, 4% acesulfame OD active ingredient 10.1 to 16.9 g / ha, Or 16% Essence + acetylacetoate WP active ingredient 48 ~ 57.6 g / ha, or 5% oxazoline acetylene oxalate EC active ingredient 45 ~ 75 g / ha, or 13% fluzazole acetylene oxalate active ingredient 58.5 ~ 78 g / ha, stem and leaf spray.

The broad-leaved weeds of the genus Poria, Bovine bred, broken rice bran, and Pomna are used. In the 3~5 leaf stage of weeds, the active ingredient of 30% flufenacetin SC is 180-270 g/ha. , or 58% difluoro-oxazolamide SC active ingredient 7.875 ~ 11.8 g / ha, or 20% difluoro - fluorochloroester OD active ingredient 15 ~ 19.5 g / ha, or 8% chloropyridazole / difluoro SC Active ingredient 120 ~ 168 g / ha stem and leaf spray.

For weeds dominated by grass weeds and broadleaf weeds, in the 2~5 leaf stage of weeds, 7% difluoro-ethinyl ester OD active ingredient 52.5-84 g/ha, or 15% benzenesulfonate • The specific component of clodinafop WP is 67.5-90 g/ha, or 40% alkyne-oxazole/chloroflupirin WP active ingredient 90-120 g/ha, or 55% thia-acetophenone WP active ingredient 82.5-99 Grams/ha, stem and leaf spray.

No-tillage and weeding: control stubborn and refractory malignant weeds with high density of anterior sputum, such as valerian, broken rice bran, alfalfa, rice leeks, algae lotus seeds, etc., 1 to 2 days before sowing, 50% glufosinate Soluble granule (SG) active ingredient 750-1,000 g/ha, or 68% glyphosate ammonium salt SG active ingredient 1,125-2,250 g/ha, or 36% glyphosate•glyphosate AS active ingredient 1,080-2,160 g / hectare spray, weeding and weeding.

Closed weeding: control of resistant medicinal weeds before and after seeding, such as Mai Niang, Japanese maiden, yarrow, piglet, leeks, etc., 33% fluorothiazolidine fur SC The active ingredient is 324-432 g/ha, or 50% of the active ingredient of penicillin WG is 105-120 g/ha.

Precautions

1. Take the second dilution method to dispense medicine;

2. The compounding application should be carried out before the large-area application;

3, the amount of spray liquid is 450 ~ 600 kg / ha, no heavy spray, no leakage;

4. Fan-shaped nozzles should be used. Conical nozzles, double nozzles and multiple nozzles are easy to produce phytotoxicity;

5, closed weeding and land preparation should be "fine, transparent, flat, real"; the application of soil requires good soil moisture; avoid dew seed application; prevent straw from returning to the field can not contact the herb.

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(Source: Pesticide Market Information Network)