How to choose the right herbicide for cotton fields?

Hello. Cotton field herbicides can generally be divided into soil treatment herbicides and stem and leaf treatment herbicides.

Soil treatment herbicides are a type of herbicides applied to the soil surface before cotton sowing seedlings, and control newly unearthed weeds in cotton fields by forming a weeding film on the soil surface.

Herbicides that are safe for germination and emergence of cotton seeds and have good control effect on weeds in cotton fields should be selected, such as flulelin, alachlor, acetochlor, butachlor, diuron, etc.

Stem and leaf treatment herbicides are a type of herbicides that achieve the control effect by spraying weeds on stems and leaves.

Herbicides with a wide herbicidal spectrum, safe for cotton, and no stubble effect should be used in cotton fields, such as pyroxyfluxafin, pyrochlorochloroxalin, quinoxalin, paraquat, glyphosate, etc. During use, a protective cover should be worn to avoid drifting to the cotton plant and causing pesticide damage.

FYI.

There are two ways to use herbicides in cotton fields.

1) Chemicals suitable for soil treatment.

Lasso (alachlor) is about 167 grams of active ingredient per mu. The amount of plastic film cotton field can be appropriately reduced, and the soil spray treatment should be carried out before sowing or before seedling emergence after sowing, and then covered with plastic film. The use of herbicides in the nutrient bowl seedbed is sprayed after the nutrient bowl is sown and covered with soil, and the pesticide belt layer is maintained.

2) Agents suitable for stem and leaf treatment.

First, choose the appropriate agent, and then decide the dosage according to the type of weed, leaf age and humidity. For example, when the soil moisture is suitable, the dosage of active ingredients per mu is 9 17 grams; drought conditions these 17 24 g; To control perennial weeds, the dosage of active ingredients per mu is 27 45 grams. Stem and leaf spraying is carried out at the 2 5 leaf stage of gramineous weeds.

Summer pesticide application should be selected in windless weather, morning and evening when the temperature is low, the spray is required to be uniform, and there is no rain within 3 hours after the drug, which can improve the efficacy.

Summary. Hello dear! Glad for your question :

Hello: At present, there are some herbicides on the market that can be used for weeding in cotton fields without harming cotton, such as: 1

Oxidation and glufosinate-ammonium: these two chemically synthesized herbicides can inhibit the growth of weeds, and basically do not produce *** for cotton plants, which can better control the weeds in cotton fields. 2.

Volatile oils: Volatile oil herbicides are mainly used to dissolve or dehydrate weeds to achieve the effect of weeding, which is more effective for small weeds and less effective for large weeds. 3.

Biological herbicides: At present, there are some herbicides on the market that are made of natural materials such as microorganisms and plants, which are basically harmless to cotton, but their herbicidal effect is not as strong as chemically synthesized herbicides. It is important to note that any chemically synthesized herbicide will have some degree of impact on the environment, so it should be operated strictly according to the instructions when used to avoid adverse effects on the environment.

Hello dear! Glad you questioned: Hello:

At present, there are some herbicides on the market that can be used for weeding in cotton fields without harming cotton, such as 1Oxidation, glufosinate:

These two chemically synthesized herbicides can inhibit the growth of weeds, and basically do not produce *** for cotton plants, which can better control the weeds in cotton fields. 2.Volatile oils:

Volatile oil herbicides are mainly used to dissolve or dehydrate weeds to achieve the effect of weeding, which is more effective for small weeds and less effective for large weeds. Liang Tsai 3Biological herbicides:

At present, there are some herbicides on the market that are produced from natural materials such as microorganisms and plants, which are basically harmless to cotton, but their herbicidal effect is not as strong as chemically synthesized herbicides. It is important to note that any chemically synthesized herbicide will have some degree of impact on the environment, so it should be operated strictly according to the instructions when used to avoid adverse effects on the environment. At the end of the answer, thank you for your question, I hope it will be helpful to you, and I wish you a happy life

My rice field has herbicide mud, and I take the soil out of the field to grow young cotton, but is it okay?

Hello dear! Glad you asked: You're a good bridge:

For this question, the safety of paddy field soils with mud sli herbicides is uncertain. There is not enough data or research to prove the effects of the chemicals in the soil on seedlings or human health. Therefore, it is recommended that you do not grow any crops in this soil.

Seedlings can be kept healthy by changing the soil or by using other weeding methods.

Dear, Hello, I'm glad to answer for you, I'm your exclusive ** answer teacher, thank you for your patience! The herbicides that do not harm cotton in cotton fields are as follows: oxidium, glufosinate, volatile oils, sullen flulene, lasso, acetochlor, butachlor, diuron, dilodiamine, and biological herbicides.

The two chemically synthesized herbicides of oxidium and glufosinate-ammonium can inhibit the growth of weeds, and basically do not produce *** for cotton plants, which can better control the weeds in cotton fields. We hope you find this service <>helpful

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One is a weed bud before the closed type.

The closed time of the seedling stage is set in front of the cover film after planting and filling the cotton seedling stage, and the types and usage of herbicides can be used: per 667 square meters, you can use 90 Ox (acetochlor) EC 40ml 50ml, or 50 acetochlor EC 75ml 9oml, or 48 steel cable (alachlor) EC 150ml 200ml, or 72 dol EC 100ml 200ml, or 24 Goll (ethoxyflufen) 12ml to 18ml water sprayer.

The streetside closed type depends on the type of cotton field, and the grass is dense in the winter fallow field, and glyphosate or paraquat herbicides should be used to control winter weeds 20 days and 30 days before cotton planting, and the above pre-bud herbicides should be mixed and applied. For cotton fields with pre-stubble plants, immediately after the pre-stubble crops are obtained, the herbicide above the pre-bud plus 20 paraquat (e.g., no shadow, a fire) herbicide is mixed and sprayed, and it is best not to use glyphosate herbicides.

The second kill is solved after the leaf stem of the weed seedling.

In the cotton seedling stage or streetside where the pre-bud herbicide has not been applied or the pre-bud processing effect is not satisfactory in the drought temperature, when the growth and development of weeds reaches the 3-leaf stage and 6-leaf stage, the leaf stem solution is carried out to hoe the weed. At the seedling stage or where the height of cotton seedlings is less than 35 cm, only the selective herbicide for cotton safety should be used to hoe the weeds.

Types and usage: 5 emulsifiable concentrate 4oml 60ml per 667 square meters, or 10 8 high-efficiency caedinable emulsifiable concentrate 20ml 30ml, or 15 emulsifiable concentrate 4oml flail ml to water 15kg 30kg sprayer. Cotton bud stage and plant height of about 35 cm planting cotton field hoeing technology:

Glyphosate herbicides were used to carry out row and row fixed sprayer hoeing, and 41 glyphosate liquid (Roundup, Nongwang, etc.) looml 200ml or 10 bridge glyphosate liquid 450ml 800ml per 667 square meters.

When spraying, a protective cover should be added to the printer nozzle, and the printer nozzle should be lowered to prevent the fertilizer from drifting to the cotton leaves. For every 667 square meters, use 5 refined grass gram emulsifiable concentrate 60ml 80ml + 90 Henais emulsifiable concentrate 60ml, or 5 refined grass gram emulsifiable concentrate 60ml 80ml plus 10 ethylcarboxyfluorfen 20ml 30ml to water 30kg sprayer. At this stage, paraquat herbicides should be used with caution, otherwise the seedlings are very susceptible to fertilizer damage.

The three supplements are the supplemental application of herbicides at the flowering boll stage of cotton streets.

For the sporadic weeds in the field, the innate herbicide glyphosate can be used, and the herbicide is applied in the form of spot and piece fusion, and the usage method is the same as the use of the budding stage, and the amount of use depends on the vertical size of the total area.

There are three principles of herbicide in cotton field to remove the difference in grass, and the rock model is one letter, two kills, and three supplements.

One is the closure of weeds before budding, the second is the treatment of stems and leaves after weed seedlings, and the first three supplements of jujube are the supplemental herbicides at the flowering and boll stage of cotton fields.

Weed pre-bud sealing, weed seedling after stem and leaf treatment, cotton field flowering boll stage supplemental herbicide, these three are the three principles.

Be sure to choose some suitable herbicides, and you should also pay attention to the time of weeding, and you should also pay attention to the amount of herbicides.

How to choose herbicides in seedling fields reasonably? Weeds are produced in early rice fields, usually 4-7 days after early rice planting, which helps the rice, but can also lead to the germination of barnyard grass and other wet weeds. It is observed that there are also many weeds when throwing seedlings and Tongfeng, <>

The amount of grass produced in 9 days after planting accounts for more than 70% of the total grass output, and after many years of planting, the weed ecosystem in the field is also changing, and the early wet weeds such as barnyard weeds, goldenrod, special-shaped sedge, water sedge and other railing weeds will produce core competitiveness species. Appropriate herbicides should be used for multi-faceted chemical control.

Rice field herbicides, butachlor EC + pyrisulfuron-methyl should be effectively used. 1 mu can be 60% butachlor EC 75ml plus 10% pyrisulfuron (grass natural enemy) wettable powder 10 grams, mixed with 20kg of fine soil, 1 week after throwing seedlings, when the rice seedlings are put into the live plant; 4 kinds of mixed herbicides, including benzylbenzyl, benzyl benzyl, benzyl dichloride, etc. Its suitable dosage is 40-50 grams of 10% benzylbenzyl heptaceta, 40-50 grams of 50% benzyl thiazyl, 100-120 grams of 30% benzyl butyl, and 30-40 grams of 25% benzyl dichloride.

The spraying period is 8-10 days after throwing seedlings and seedlings (before the 2-leaf stage of barnyard grass), <

First remove the dry field water, then spray the water, the next day water, and lock the water for 3-5 days, its grass killing spectrum is wide, and the actual effect of comprehensive hoeing is stable above 90%; Formulation of phenthiachlor and benzisulfuron or 36% dichlorobenzyl wettable powder (i.e., fast barnyard plus benzsulfuron). The use of 35-40 grams per mu can delay until 10-15 days after throwing seedlings without waterproof layer spraying, 1 2 days of water after taking the medicine, and maintain the shallow water layer for 3-5 days.

In addition, 1 mu can also be sprayed with 110ml of 20% dimethyltetrachloride solution and 100ml of 25% bendapine solution, and 30kg of water to prevent broad-leaved plant weeds and sedge weeds; Baitianjing, generic name: tetrazolam, 50% wettable powder. It is also reasonable for the key weeds in the paddy field, barnyard grass and goldenrod, and for the special-shaped sedge, duck tongue grass and cow felt, which are widely used in the paddy live broadcast field, seedling throwing field and its planting field, and can be taken on the day of planting, and there is no other negative impact on rice.

Choose herbicides that are not harmful to seedlings, and pay attention to the dosage of each herbicide, and dilute the amount of herbicide.

In fact, you can choose the corresponding weeding and widening agent according to the weeds in your field, after all, this herbicide is mainly aimed at some types of weeds.

First of all, we should choose some herbicides with good stability, choose the right time to wither, spray herbicides appropriately, ensure the safety of the plant's limb holes, and also ensure the effect of weeding.

First of all, it is necessary to grasp the right time, be sure to avoid rainy weather, and the vertical attack is Brother Yu's windy weather, and according to different crops, to choose the right herbicide, and to pay attention to the concentration of the judgment, and pay attention to the right temperature.