What should I pay attention to when using herbicides?

1. Before the use of herbicides, it is necessary to understand the mechanism of action of herbicides, the application of plants, and the scope of weeding, so as to prescribe the right medicine. Choose the right herbicide according to your needs. Different herbicides have different requirements for the growth period of weeds, such as soil sealants require pre-bud medication, and the efficacy of weeds is not good after they are unearthed; Post-emergence herbicides require weeds to be used at the three-to-five-leaf stage, and the grass age is too large to play a good effect, such as winter wheat producing areas, and the application time is divided into pre-winter application and post-holiday application.

2. Read the instructions carefully before use, and do them in accordance with the dosage, application time, application methods and precautions required by the instructions. In general, the application effect is better when the temperature is greater than 20 degrees. Systemic herbicides are effective in the evening.

Pesticide application method: The herbicide spraying method is mainly full spraying. Spot spraying is mainly used to spray special weeds or older weeds. Which herbicides, sealants, and herbicides with strong selectivity are used for full spraying.

3. It is strictly forbidden to use herbicides such as warm-season lawns, cold-season lawns, wheat winter lawns and nurseries.

Fourth, pay attention to soil moisture when closing weeding. When the soil is dry, it should be watered first and then sprayed. or when the ground is wet after rain.

It is better for people to walk upside down when applying pesticides. For example, the amount of herbicide used in sandy soils should be reduced compared with clay and loam, and the amount of herbicides used in poor soils should be reduced compared with those in fertile soils.

5. After each spraying, the pesticide bucket should be cleaned with soapy water for the next use.

Sixth, the herbicide should be tried in a small area first, and the effect can be felt before it can be used in a large area. Don't cause us huge losses because of the wrong judgment of the salesman or technician. When we use herbicides, we need to master the application technology of herbicides, because herbicides need to control many kinds of weeds at the same time, so the necessity of mixing herbicides is much greater than fungicides and insecticides.

When mixing herbicides, it should be noted that the herbicidal activity may be reduced or increased or unchanged after the mixing of two or several herbicides.

It should be noted that when using, it is best to choose some relatively low concentrations, and when spraying, it must be evenly sprayed on the roots, and attention should be paid to spraying less.

Pay attention to the efficacy of herbicides, but also to the way to remove herbicides, but also pay attention to the efficacy of herbicides, pay attention to the way to use, pay attention to contraindications, these are all things that need to be paid attention to.

First of all, we should choose some high-quality herbicides, and at the same time, we should also choose some with high stability, choose some with high cost performance, and choose with better effects.

How to use herbicides correctly and what should I pay attention to? Let me tell you about it

Expensive herbicides are not necessarily the most practical, and the most suitable herbicides should be selected according to the local grass phase, so that good weeding results can be achieved.

Strictly grasp the dosage of herbicides: the highly recommended dosage of each herbicide is the result of many years of practical activities and various experiments, and it is never allowed to increase and decrease the dosage at will, so as to ensure the effect of herbicides, and it is not easy to produce fertilizer damage, otherwise very reliable herbicides will also cause fertilizer damage.

Spray at the best time: The herbicide is used in 3 stages: one is the pre-planting soil solution, the second is the post-sowing pre-seedling soil solution, and the third is the leaf stem solution.

Post-sowing and pre-emergence solutions, also known as pre-bud solutions, are the application of herbicides after the seeds of grain crops are planted and before they emerge. This stage is relatively short, only a few days, and it is necessary to strictly grasp and apply herbicides before seedlings according to the situation. After sowing, the soil before seedlings is solved, and the effect of chemical control of weeds is good, but if the spraying is not immediate, it will harm the germination and erection of the fertilizer.

Pay attention to the temperature at the time of spraying: temperature is a major factor that can harm the growth and development of weeds and the effectiveness of herbicides. Generally, when the temperature is high, it is beneficial to give full play to the herbicide's medicinal power, and the herbicide effect is not good.

Pay attention to soil characteristics: soil characteristics are very harmful to herbicide power, soil with high organic matter content, good soil colloid, large amount of herbicide absorption, large number of soil microbial strains, abundant activity content, herbicides are easy to be dissolved, the same amount of use is safe for food crops, but the hoeing effect is poor, so it is necessary to increase the dosage moderately.

Climatic elements: Concerned about the hazards of wind, rain, environmental humidity, drought, temperature, sunshine and other temperature factors.

Sunlight and spring exposure: paraquat, herbicides, hail farmers, etc. are all photoactivating herbicides, which can kill weeds under the effect of light. The photosynthesis retardants of plants such as simazine, diuron, and prometrion can also inhibit the photosynthesis of weeds and plants under bright conditions and give full play to the effect of hoeing.

Fluorinin is easy to volatilize when applied to the surface of the soil, and it is easy to dissolve when it sees light, so it should be mixed with the surface soil immediately when applied.

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In agriculture and animal husbandry, farmers are happy to control weeds, which has excellent economic benefits. The following aspects should be paid attention to when farmers are happy to control weeds:

In the appropriate period of eradication, farmers are happy to digest and absorb the emerald green leaves and stems of weeds, and transmit them to other locations. Therefore, when applying pesticides, weeds should have a certain total area of medicine, which is conducive to stronger digestion and absorption of the drug solution, and the total area of the treatment is small, which is difficult to exert its effect. The best period of application for farmers to control weeds should be in the weed budding blooming link, that is, the weed growth rate is larger, annual weeds have 3-4 leaves, and the plant height is 5-10cm; Perennial growth of perennial root weeds 6-8 leaves, plant height of 20-40cm when the application of pesticides, the maximum potency.

Selective weeding

1. Selection of height difference: orchards, mulberry orchards and other economic forests and tall crops such as cotton wool, bud rice, and ganshu can be hoeed in rows and rows, and the difference in height and width ratio between weeds and rare plants can be used to lower the printer nozzle and carry out spraying.

2. Time difference selection: bract rice, soybeans, cotton wool, vegetables and fruits and other crop fields, farmers can be used to kill the weeds that have sprouted without hindering the germination of crops.

3. Directional spray selection: Plantations, mulberry gardens and other economic forests and cotton wool, bud rice, Ganshu and other weeds can be worn on the nozzle, put down the printer nozzle, and spray the item to prevent the liquid from being sprayed on the rare plants.

4. Protective spray selection: After the seedlings and seedlings of crops such as cigarettes, vegetables and fruits are planted, the seedlings can be covered with equipment or plastic covers, covers, blocks and other methods, and spraying can be carried out.

Preparation and application of liquid medicine

Add half of the cold water to the sprayer first, pour the measured dose into the sprayer, and then add cold water to the short-circuit capacity, and after a little mixing, you can spray evenly. Farmers hoe grass 20-30kg per 667m2 of water, not suitable for too much. The spray should be delicate in the fog spots, improve the adhesion rate of the liquid medicine on the surface of the leaf stem, and prevent the liquid medicine from dripping on the road.

Precautions

Farmers are happy to use herbicides, so they should avoid the pesticide drifting to the non-overall target green plants, resulting in fertilizer damage. After being absorbed by the greenery, it is transferred to any part of the plant's body, including the roots buried in the soil. At the same time, because farmers mainly inhibit protein synthesis, so that green plants die due to lack of protein, therefore, the full exertion of the drug is relatively slow, and the weeds will die after L5D after the application of pesticides.

Farmers do not have soil-closed residual vitality and cannot prevent weed seeds from germinating, so the weeds found after application should be treated again. When spraying, it is advisable to choose a temperature of high temperature, dryness, no wind entering, and clear skies, from 10 am to 4 pm. After 4 hours of rain, the pesticide will be reduced, and the spray will be sprayed as much as possible.

Due to the low temperature plasma complexation of calcium, magnesium and aluminum, the farmer Leyi lost its vitality. Clean demineralized water should be used when mixing the pharmaceutical liquid, and mixing with sludge or turbid water will reduce the chemical power.

When using herbicides, try to adjust the ratio of water and medicine, and try to put the pesticide spraying mouth down, so as to avoid spraying on crops, and can also effectively remove some weeds, the effect is also very good.

It should be noted that you must choose the right herbicide, you must buy some big brands of herbicides according to your own situation, and then when you buy herbicides, you must choose according to the height of your crops, and then you must master the corresponding pesticide configuration method. It should be noted that when using this herbicide, do not spray it on other crops.

The new herbicide should pay attention to the dosage of the use, not too much, and should be used when the wind is downwind, so that the area of blowing is wider.

First of all, it is necessary to choose some big brands, and we must choose some herbicides with good weeding effects, we must choose the right herbicides according to the varieties planted, and then we must pay attention to the appropriate amount, and we must water them in time after weeding.