How to choose herbicides, tips on using herbicides

How to choose corn herbicide correctly? Today I will tell you how to choose corn herbicide:

1. Choose the right herbicide

1. Select the herbicide according to the target of control. Look at what kind of weed population is dominant in the field and choose the herbicide with the corresponding weed control spectrum.

2. Choose appropriate herbicides according to the crops in the field. For corn fields, you should choose herbicides specifically for corn fields.

3. Select drugs according to the application period. Drugs used after sowing and before seedlings cannot be used for post-seedling applications, and drugs used for soil treatment cannot be used for stem and leaf treatment.

4. Consider the safety of adjacent crops and next crops.

2. Strictly follow the dosage

The dosage of herbicides must strictly follow the standards specified in the instructions for use, and the dosage must not be increased at will. When two or more herbicides are mixed, the dosage of each herbicide should be 1/3 to 1/2 of its conventional dosage. The amount of liquid medicine used per mu (after the stock solution is diluted with water) is not less than 30 kg for soil treatment without returning straw to the field, and not less than 45 kg for returning straw to the field; for stem and leaf treatment, it is not less than 30 kg when the weeds are small, and not less than 45 kg when the weeds are large.

3. Scientific mixing and matching

When using a single herbicide, the dosage should be calculated according to the safe and effective dose of the herbicide and the actual area of ​​the corn field. When mixing two or more herbicides at the same time, different herbicides must be selected, but the applicable crops, period and use methods must be consistent and basically the same; when mixing wettable powder with emulsifiable concentrate, the wettable powder should be dissolved in a small amount of water to make a mother liquid, and then the emulsifiable concentrate should be added; when preparing the liquid, first fill half of the sprayer with water, then add the second diluted pesticide mother liquid, and finally add enough water, shake well and spray.

4. Apply pesticides at the right time

The appropriate time means strictly following the period specified in the instructions, and choosing to apply the pesticide during the growth period when weeds are most sensitive to herbicides and corn has the strongest resistance to herbicides, so as to improve the prevention effect and ensure the safety of seedlings. If it is suitable for pre-sowing soil treatment, it should be used before sowing; if it is suitable for use before seedlings after sowing, it should be used before seedlings after sowing; if it is suitable for stem and leaf treatment, avoid the sensitive period of crops. Timing means avoiding high temperature, high humidity or strong winds, and cooling weather to prevent drug damage or reduce drug efficacy. Generally, it is safer to choose clear and windless weather and use the drug after 5 pm. Corn is most sensitive to herbicides during the bud stage and before the 4-leaf stage, and is prone to drug damage. Attention should be paid to the concentration of the herbicide when applying herbicides during these growth stages.

5. Scientific operation and use

When spraying herbicides, you must be careful and scientific in operation. When working in the field, you must walk at a uniform and appropriate speed, keep the working pressure of the sprayer stable and moderate, accurately press the stubble back and forth in the field, spray without missing or overspraying, and ensure that the spray is uniform and consistent. And after applying the pesticide, you must perform corresponding field management according to the requirements in the instructions.

6. Clean the medicine and equipment in time

Sprayers and other tools used for spraying herbicides should be soaked in alkaline water or special cleaning agents and cleaned multiple times after use to prevent pesticide damage when used on other crops. It is best to use special sprayers.