Can you apply herbicides to wet floors? How effective are herbicides in drylands?

*Wet ground may affect the effectiveness of herbicides**. If the soil is too wet, such as standing water, the active ingredient of the herbicide will be diluted, reducing its effectiveness. In addition, if there are too many impurities or minerals in the soil, it may also affect the effectiveness of the herbicide.

Therefore, when using herbicides, it is best to choose sunny and windless weather to ensure that the soil is dry and avoid affecting the weeding effect. If there are problems such as standing water, you can drain the water before using herbicides. At the same time, it is also very important to choose the right agent and timing to improve the effectiveness of weeding.

Use herbicides.

To be effective, it's important to choose a good timing!

There are many factors that affect the effectiveness of herbicide use, such as temperature and air humidity.

Soil nutrients, light, grass age, etc. "Southern Chinese potatoes.

Zhang Waithong, an expert at the research center, said that the best control period for weeds is at the 2 to 3 leaf stage. If the grass age is too large, the resistance will increase, and the dosage must be increased. The high temperature is conducive to the herbicide being absorbed by the weeds, and the effect is good, but the higher the temperature, the better, the temperature is too high, and the sprayed mist is quickly evaporated, especially for some volatile herbicides and herbicides that are decomposed by photo, which will reduce the weeding effect.

In order to work well with herbicides, it is important to choose the right time!

There are many factors that affect the effectiveness of herbicide use, including temperature, air humidity, soil nutrients, light, grass age, etc. Zhang Zhihong, an expert at the South China Potato Research Center, said that weeds are best controlled at the 2 to 3 leaf stage. If the grass age is too large, the resistance will increase, and the dosage must be increased.

The high temperature is conducive to the herbicide being absorbed by the weeds, and the effect is good, but the higher the temperature, the better, the temperature is too high, and the sprayed mist is quickly evaporated, especially for some volatile herbicides and herbicides that are decomposed by photo, which will reduce the weeding effect.

The effect is not particularly good. This is because herbicides are not suitable for use in drylands, so they are particularly ineffective and can even cause harm to the drug.

The effect is very good, as long as the right pesticide is selected, there is no problem at all, and it will not be affected by dry land.

The effect is very limited, in this case it will affect the growth of the plant, and it will also affect the yield of the plant.

Applying herbicides on wet ground will not necessarily hurt the seedlings.

As long as it is applied according to the proportion of water on the instructions.

Common herbicides include atrazine.

Atrazine herbicide can control a variety of annual grasses and broadleaf weeds. It is suitable for the control of horsetail, barnyard grass, dogtail grass, sedge, kanmai niang, knotweed, quinoa, leguminous weeds and leguminous weeds of corn, sorghum, sugarcane, fruit trees, nurseries, woodlands and other dryland crops.

How to use:1The use of corn field summer corn is used before emergence after sowing, and the soil organic matter quality is 1% to 2% in North China, Shandong and other places, 150 to 200 grams of 50% wettable powder per mu, or 175 to 200 ml of 40% suspension agent; In the Northeast region where the soil organic matter content is greater than 3% to 6%, 200 to 250 grams of 50% wettable powder or 200 to 250 grams of 40% suspension agent per mu, the lower limit for sandy soil and the upper limit for clay soil.

1 to 3 days after sowing, spray the soil surface evenly on 30 kg of water. After the emergence of corn, the appropriate period is the 4-leaf stage of corn and the 2-3-leaf stage of weeds; For sandy soils with low organic matter content, use 200 to 250 grams of 50% wettable powder or 40% suspension agent per mu. Spray on 30 to 50 kg of water.

Spring corn per mu with 40% suspension agent 200 to 250 ml, add 30 to 50 kg of water, spray the soil surface before seedlings after sowing, mix soil after spring drought medicine, or appropriate amount of irrigation. Or in the 4-leaf stage of corn as stem and leaf treatment. In the continuous cropping area of maize and winter wheat, in order to reduce or eliminate the pesticide damage of atrazine to wheat, atrazine can be used to reduce the amount of atrazine and mix it with herbicides of grass jingjin, lasso, dol, 2,4 to d butyl ester, bannong and green melon.

2.5 to 7 days after the cane is planted, the weeds are partially unearthed, 200 to 250 grams of 50% wettable powder or 40% suspension agent per mu, 30 kg of water is added, and the surface is evenly sprayed.

3.Tea gardens, orchards, vineyards use the peak period of weed germination in the field from April to May, first eradicate the unearthed grass and overwintering miscellaneous lines, and then use 250 to 300 grams of 40% suspension agent per mu, and evenly spray the soil surface with 40 kg of water.

Atrazine is a herbicide for pre-bud soil treatment, and can also be treated with stems and leaves after budding. Drought has a great impact on the efficacy of the medicine, mainly on dicots, focusing on closure, and the effect on grass is not ideal. It also has a certain inhibitory effect on some perennial weeds.

The residue period of atrazine in the soil is generally about 6 months, because its residue period is relatively long, so it needs to wait for a period of time after application to plant the next crop, for cucumbers, it generally takes about 40 months to plant, and tobacco, alfalfa, sugar beet, rape, flax and other crops also need to go through 24 months before planting.

After an hour, it rains fine, and by this time the insecticide has been absorbed by the weeds, and the rain will not affect its effectiveness. 2. Try to choose no wind and no rain when spraying herbicides, pay attention to the types of herbicides, and avoid affecting the surrounding crops. 3. The dosage of herbicides needs to be determined according to the standards on the instruction manual.

4. When the soil is wet, the absorption of the effect will be better.

1. It's okay how long it rains after the herbicide

1. Generally, the light rain is fine after spraying herbicides for 4 hours.

2. Generally, after 4 hours, the insecticide has been absorbed by the weeds and begins to slowly play the role of the herbicide.

3. When spraying herbicides, it is necessary to pay attention to the medication and spraying environment, and try to choose no wind and no rain when applying pesticides. Medication on windy days may have an impact on crops at the downwind outlet, while medication on rainy days will reduce the efficacy of pesticides and cause pesticide damage to surrounding crops.

4. When playing herbicides, we should pay attention to the types of surrounding crops, and the herbicides are very targeted, for example, the herbicides used in grasses may cause harm to the broad-leaved crops next to them.

5. Pay attention to the dosage of herbicide, and use it according to the marked dosage on the instructions for use, so as to ensure the effect of the herbicide.

Second, it is better to apply herbicides to wetlands or dry land

1. The effect of spraying when the soil is moist is better than spraying in the soil drought. When the soil and air are moist, the absorption of the agent is better, and in the case of drought, the weeds will close the stomata to lock the water in the body.

2. When there are still weeds in the soil that have not grown, you can wait for a period of time until the weeds in the field grow up, and then go to apply herbicides, so that the effect of using pesticides is better.

3. Try not to spray at the germination stage of weeds, but at the stage of 2-4 leaves of weeds, so that the effect is better.

4. Dew generally appears in the field in the morning and evening, which may affect the efficacy of the drug, so it can be applied from 9 to 10 o'clock in the morning, or from 4 to 5 o'clock in the afternoon, and the effect is better.