What do you know about the application of acetochlor in field crops?

During the growing period of the crop, weeds are overgrown. Therefore, the use of acetochlor and other chemical products to control weeds has become one of the key tasks of farmers. So, what is the application of acetochlor for field crops?

1. Use "acetochlor" to weed before germination. Acetochlor is widely used in pre-emergence control of weeds in upland because of its high herbicidal activity, wide application range and crop safety. It can be absorbed by the buds and young roots of weeds, inhibiting protein synthesis and causing it to die.

2. Acetochlor g l, 990 g l) is an amide herbicide with selective system conduction, which can effectively control annual grass weeds and broad-leaved weeds propagated by annual small seeds, such as barnyard grass, dogtail grass, horsetail, quinoa, Chinese cabbage, chickweed, etc. , which is mainly absorbed by young monocotyledonous weeds.

3. Commonly used herbicide formula for soil sealing in soybean fields: acetochlor + 2,4-drops of isooctyl ester. The use of soybean field before soil arching period has the characteristics of safety for stubble crops, low cost, control of annual grass weeds and broad-leaved weeds in soybean fields, and killing annual and perennial broad-leaved weeds unearthed during use, but the disadvantage is that the effective period is short.

Dosage: 900 g per hectare, acetochlor 1700 g or 990 g per liter, acetochlor 1500 g + 900 g per liter, 2,4-dropisooctyl ester 450-600 g, 225-300 liters of water per hectare.

4. "Acetochlor" herbicide can be used for weeding in direct seeding fields and transplanting fields. The key is to know how much water is used and how much is used. The field should be weeded first, then sown, and then used "acetochlor" when the Chinese cabbage has not yet emerged and some weeds have germinated (the so-called "post-sowing and pre-seedling").

Because this herbicide is most sensitive to grasses during this growing season, it is most effective at controlling weeds. The dosage per mu is 74-100 ml, add 40-50 kg of water, such as sandy soil, the dosage is slightly increased to 100-120 ml.

The weeding method of transplanting the cabbage field is the same as above, that is, the "acetochlor" is evenly sprayed on the soil before transplanting, and the dosage of medicine per mu is the same as that of the direct seeding field. When the soil moisture is high, pay attention to the use of "acetochlor", which is conducive to the efficacy of herbicides.

As a strong herbicide, acetochlor is used in crops, with a wide range of applications, and will not cause serious harm to crops.

It can achieve the effect of weeding, protect the survival rate of crops, effectively deal with weeds, help crops grow better, can plant and weed, and can ensure the moisture and nutrients of crops.

The growth of weeds can be inhibited in the field, especially in the soybean field for two days, and the best way to use it is to mix it with some water and water the ground.

<> acetochlor is a low-toxicity herbicide, which is safe for humans, livestock and crops, and has a long effective period (60-70) days to prevent pests. Acetochlor is a selective herbicide, which is digested and absorbed according to the seedlings and young roots of wild grasses, and the digest and absorption of monocotyledon grasses and weeds according to the bud sheath. When the drug enters the weed, it inhibits the growth and development of seedlings and young roots, and then withers and dies.

Acetochlor can be used in soybeans, potatoes, cruciferous family.

Leguminous plants and other crops are key to preventing horse ponds, barnyard grass, dog's tail grass, purslane, etc., but are ineffective against perennial weeds.

Soybean field: 1 mu of spring soybean in Northeast China with 120-150ml of 90% acetochlor emulsifiable concentrate, North China.

100-120ml of 90% acetochlor EC for 1 mu of spring soybeans, 80-100ml of 90% acetochlor EC for 1 mu of summer soybeans in North China, topsoil sprayer before sowing or before germination after sowing.

Corn field: 120-150ml of 90% acetochlor EC for 1 mu of spring corn in Northeast China, 100-120ml of 90% acetochlor EC for 1 mu of spring corn in North China, 80-100ml of 90% acetochlor EC for 1 mu of summer corn in North China, 60-80ml of 90% acetochlor EC for 1 mu of corn field in the Yangtze River section and South China, and topsoil sprayer before or before germination before sowing or after sowing.

Peanut kernel field: 100-120ml of 90% acetochlor emulsifiable concentrate for 1 mu of spring peanut kernels in North China, 80-100ml of 90% acetochlor emulsifiable concentrate for 1 mu of summer sowing peanut kernels in North China, 60-80ml of 90% acetochlor emulsifiable concentrate for 1 mu in the Yangtze River section and South China, and topsoil sprayer before sowing or before germination after sowing.

Cotton field: 80-100ml of 90% acetochlor emulsifiable concentrate is used for covering 1 mu of cotton field with plastic film in North China, 100-120ml of 90% acetochlor emulsifiable concentrate is used for covering 1 mu of cotton field with plastic film covering in Xinjiang region, and topsoil sprayer before or after sowing is covered with subfilm. The amount of pesticides in the cotton field in the open field cultivation room was 30% higher than that in the cotton field covered by plastic film.

After the use of acetochlor in cotton fields, ultra-low temperatures, high and low temperatures were encountered.

It is very likely that the growth will suffer from minor damage, and under normal conditions, growth and development can be repaired after a sunny day. Potato field: 1 mu with 100-140ml of 90% acetochlor EC, topsoil sprayer before sowing or before germination after sowing.

Rapeseed field: rapeseed field planted in the Yangtze River section and South China, 60-80ml of 90% acetochlor emulsifiable concentrate is used for 1 mu, and topsoil sprayer is used before or after planting. Northern Regions.

Rapeseed field, 1 mu with 100-120ml of 90% acetochlor EC, topsoil sprayer before sowing or before germination after sowing. Sugarcane field, garlic field: 80-100ml of 90% acetochlor EC for 1 mu, topsoil sprayer before or after planting.

Rice, wheat, millet, sorghum, cucumber, spinach and other crops are sensitive to acetochlor and should not be applied.

The control targets of acetochlor are annual grasses and broad-leaved weeds with small seeds. There are special effects on annual grasses such as horsetail, dogtail grass, cow tendon grass, barnyard grass, goldenrod, kanmai niang, wild oats, early maturing grass, hard grass, teff grass and other annual grasses.

It also has a certain control effect on broad-leaved weeds such as Chenopodaceae, Amaranthaceae, Polygonaceae, Duck Plantar Grass, Chickweed, and Silkseed, but the effect is worse than that of Poaceae weeds, and it is ineffective against perennial weeds.

Applicable crops such as corn, cotton, beans, peanuts, potatoes, rape, garlic, tobacco, sunflower, castor, green onions, etc. Precautions (1) Use a low dose for sandy soils and a high dose for clay soils. (2) For soils with organic matter content of more than 4% in Northeast China, the dosage should be increased by about 30%.

3) When the soil moisture content is low, use a high dose, and when the soil moisture content is high, use a low dose. (4) Due to the dry weather in spring in northern China, when applying acetochlor in a large area in the spring in the north, it is best to apply the pesticide before sowing or transplanting, so as to facilitate the mechanized mixing operation. (5) Wheat, rice, millet, sorghum, cucumber, watermelon, melon, spinach, and leeks are sensitive to acetochlor and should be used with caution.

6) This product is only effective for weeds before germination and unearthing, and can only be used as a soil treatment agent. (7) Soil temperature affects the speed of plant absorption of this product, and the absorption rate is higher at higher temperature (27 32) than at lower temperature (16 21), so the amount of crops sown in higher temperature areas or summer sowing fields in the south is lower. (8) Among the factors such as sowing depth, thickness of the pesticide layer, soil properties, climatic conditions and plant absorption parts, it was mainly affected by the sowing depth and the depth of soil covering after the pesticide.

In general, crop seeds should be sown under the pesticide layer and ensure that the soil is well covered. (9) The activity of this product is affected by soil type, moisture, organic matter content and soil temperature. The dosage is generally 1 times higher in areas with low soil temperature, high organic matter content, low rainfall and clay-like soils.

The amount of pesticides used in sandy soil should be reduced accordingly to prevent heavy rainfall from bringing a part of the pesticides that are not completely adsorbed by soil particles to the root layer and contact the young shoots and roots, which may cause pesticide damage. (10) The application method is the same as other pre-bud herbicides, and the sprayer is applied after sowing or transplanting, generally not more than 3 days, or before sowing or transplanting at the end of land preparation. For plots that need to be drained, ditch in advance and spread the ditch mud before spraying.

Before application, the soil surface should be fully leveled, and there are large pieces of soil that hinder the weeding effect. (11) In order to ensure uniform spraying, it is recommended to use fan-shaped or other narrow nozzles. If mechanized farming is used in the northern region, water can be added to the medicine box of the motorized sprayer, and then the rated amount of medicine can be added, and it can be sprayed by stirring evenly.

12) The activity of this product is very high, and the dose should not be increased at will during application, and it should be sprayed evenly to avoid re-spraying and missing spraying. The lower limit of the amount of land withdrawal of plastic film cover crops. If there is no 5 lomm rainfall within 15 days after application, artificial irrigation is recommended to promote the germination of seeds and the spread of pesticides to form a control layer to ensure the effectiveness of seedlings and weed control.

Pay attention to drainage after rain in rainy areas, and water accumulation after heavy rain in poorly drained plots will hinder crop emergence or slight pesticide damage. (13) In case of low temperature on rainy days after pesticide application, crops may show leaf greening, slow growth or shriveling, but with the increase of temperature, it will resume growth, which generally does not affect the yield. (14) Rice, wheat, millet, sorghum, cucumber, spinach and other crops are sensitive to this product and should not be applied.

15) Empty containers and spraying utensils should be cleaned with clean water many times, and this sewage should not be allowed to flow into water sources or ponds.

During the growth and development period of grain crops, weeds are scattered, which will not only endanger the growth and development of grain crops, but also cause the reduction of resource consumption, grain crop quality and production. Therefore, the application of acetochlor and other organic chemical products to control weeds has become one of the key tasks of farmers. As everyone knows, when applying acetochlor, various problems often occur in its use effect.

What are the aspects that will harm the herbicidal effect of acetochlor? How to use acetochlor? I'll lead you to find out below:

1. The temperature is slightly lower.

In early spring, ultra-low temperatures or slightly lower soil temperatures, the use of acetochlor usually jeopardizes the full use of the efficacy, resulting in the adverse effects of poor weeding effect. Not only acetochlor, but also many herbicides are also affected by ultra-low temperature at different levels.

2. Climatic drought.

The herbicidal effect of acetochlor is very harmful to soil moisture. After spraying, if there is little rain and drought, the effect is usually not very good. When in use. The water flow can be moderately increased to improve the efficacy.

3. The relative density of weeds is too large.

All a herbicide. It is also difficult to achieve a 100% prevention effect in the whole process of large-scale use, and the same is true for acetochlor. Even if the control effect is 1j90, if the relative density of weeds in the field is too large, the remaining 10 weeds will still cause some damage to the crops.

4. Weeds are more complicated.

Acetochlor has a good control effect on many weeds, but it is not good for any weed control base, so when there are more types of weeds in the field, there will still be some weeds that are not sensitive to acetochlor.

5. The quality of spraying is not very good.

The quality of the spraying immediately jeopardizes the efficacy of the drug. If the spraying is uneven, it will inevitably lead to a part of the road surface leakage, and the prevention effect is difficult to ensure.

6. Dosage is prohibited.

To control weeds, it is necessary to accurately control the amount of drugs used. If the dose is insufficient, the prevention effect cannot be achieved; On the contrary, if you use too much, it will not only consume chemical fertilizer, increase costs, but also easily cause fertilizer damage.

7. Ploughing is not careful.

The use of herbicides is more stringent on tillage. If the ploughing is not careful, there are more soil stubbles, or the crop stubble of the previous year is not cleaned, etc., it will definitely endanger the uniformity of the road surface medicine, resulting in some weeds not touching acetochlor after the unearthed cultural relics, and the control effect is not very good.

8. Spray when the wind is strong and the temperature is high.

In case of wind and high temperature, the spray is easy to be blown away by the wind, so that the road surface is leaked or the dose is insufficient, and the prevention effect cannot be achieved.

9. Deficiencies of the drug itself.

The quality of a drug is a key factor in harming its efficacy. Some fertilizers are stored for too long, resulting in reduced or ineffective efficacy; Some chemical fertilizers have insufficient chlorogenic acid components, and they cannot achieve the estimated control effect. The existence of counterfeit and shoddy goods should be given due attention.

The reason why acetochlor is not effective may be because the temperature of the soil is particularly low, or when Huihu is used in the spring before the beginning of the air difference, or because it encounters a rainy day after use, or because the dilution is too serious and the effect is not obvious.

I know that it may be because the temperature is too low, or it may be because there has been a drought, or because the weeds are more abundant, and the bridge has affected the whole field, so there is such a problem.

It may be that the temperature at that time is not slow to erect, it may be that the soil is too dry, it may be that the size of the drug is not appropriate, it may be that the concentration is not grasped, or it may be that the medicine is expired.