Is it OK to plant cabbage as soon as there is grass in the field after beating paraquat?

Is it okay to plant cabbage immediately after beating grass in the field? I don't think so, at least a week or 10 days later, because paraquat is a very. A powerful pesticide, he is harmful to cabbage Cabbage is a very tender, a plant, its root system is relatively small, so you must give him a buffer time.

Hello! Theoretically, planting can take place the next day.

But, in practice, often after 3-4 days.

Paraquat is a fast-acting contact generary amine salt herbicide. The active ingredient has a strong destructive force on the chloroplast membrane, so that photosynthesis and chlorophyll synthesis are quickly stopped, and the leaves begin to be damaged and discolored 2 to 3 hours after the treatment, and the green tissues of monocots and dicots have a strong destructive effect, and there is a certain conduction effect to destroy the green plant tissues, but can not penetrate the embolid bark, and it is easy to be passivated after contacting the soil. It cannot destroy the roots of the plant and the seeds hidden in the soil, so the weeds regenerate after application.

No, you have to wait a week for all the grass on the ground to wither, and then turn the ground deep and bury the grass underneath, and then you can plant cabbage.

There is no problem, paraquat is inactive when it encounters soil, but it is best to wait, otherwise it will affect the weeding effect, although it is not slow, but it will take time...

Paraquat is effective on above-ground parts and not on underground rhizomes, but can be planted with cabbage.

No, the poison hasn't dissipated yet.

The drug remains for a long time and is highly toxic. It's best to don't plant for three or two years.

Hello, it is recommended to start planting vegetables after 3-4 days after paraquat is beaten, as paraquat will quickly degrade and will not cause long-term pollution to the land.

Vegetable planting should provide suitable soil for acid and alkalinity, such as acid-loving peanuts should not be planted in alkaline soil; To still be different from its cold-tolerant, temperature-loving varieties, provide a suitable temperature of 15 20 or 20 30, do a good job in water and fertilizer management, let vegetables receive an appropriate amount of light to meet their growth needs, and do a good job of weeding and insect control, so that they can thrive, vegetable planting techniques are as follows:

1. Suitable soil

Planting vegetables needs to provide suitable soil for growth, such as peanuts, potatoes and other vegetables need to prepare acidic soil for them, and vegetables such as spinach and leeks can grow better in alkaline soil, and can not provide them with unsuitable soil for acid and alkali, and the growth of a flag is poor.

2. Temperature

When planting vegetables, it is necessary to choose the appropriate temperature in combination with its varieties, among which cold-tolerant vegetables such as green onions and spinach can maintain a temperature of 15 20, semi-cold-resistant cabbage and carrots should be controlled at 17 20, and vegetables such as cucumbers that like temperature need a suitable temperature of 20-30 °.

3. Water and fertilizer management

In the vegetable planting technology, we should also pay attention to the management of water and fertilizer, generally for the vegetables that have just been sown with seeds, they need to be watered once, they need to see the dry and wet watering, the fertilization should not be excessive, and the thin fertilizer can be applied diligently to supplement the nutrients, and the water-soluble fertilizer can be applied 1 2 times in January to make the loose and vigorous.

Fourth, light

Growing vegetables should also take care to provide them with the right amount of light so that they can grow and thrive. Vegetables such as yam and eggplant have a large demand for light and need to receive strong light to meet their growth needs; while cabbage and broccoli only need to be maintained in semi-shade; Mushroom vegetables should be maintained with less light to help them grow.

5. Weeding

Usually when planting, we should also pay attention to weeding and shadling, and remove the weeds that grow around the vegetables in time, so as not to consume nutrients in the soil and make the vegetables grow poorly.

It usually takes about 1-2 days after paraquat spraying to start growing vegetables. Paraquat is a contact-killing, biocidal herbicide that quickly removes annual weeds after spraying and has a strong killing effect on perennial weeds. Paraquat is also non-systemic and non-residual, and the active ingredient of paraquat is rapidly blunted when it enters the soil, making it ineffective on the roots of the subterranean parts.

After paraquat is beaten, it is at least a year before you can grow vegetables, as paraquat has a long duration of effect.

After the grass quat is killed, you can plant vegetables in the future, and turn the soil over again, so that you can replant the plants.

This mainly depends on the type of herbicide.

If it is a soil-sealing herbicide, it is best not to plant vegetables with seeds, because it can cause pesticide damage to newly unearthed vegetables, and the pesticide damage will remain for a long time, and even affect the next crop.

If it is a selective herbicide, as long as it is not for the vegetables planted, you can choose to plant the vegetables on the same day, and if it is a herbicide for the type of vegetables planted, you must wait until the end of the residual period of the drug before planting.

If it is an incidistric herbicide, it is necessary to look at its main components to decide, if it does not have an endogenous type, a few hours to a few days can be, if it has an endogenous type, it is best to wait for more than 2 weeks, and generally the herbicide residue can reach a month for a long time.

It is suggested that before planting vegetables, the residue should be degraded in advance, and weeding safety additives can be used, so that it is safer to plant after reducing the residue.

Operational techniques

Compared with insecticides and fungicides, herbicides have higher technical requirements. Inappropriate use of insecticides and fungicides may only affect the control effect. Improper use of herbicides is a matter of crop growth.

In order to ensure the safe and efficient use of herbicides, the key technologies are introduced below for reference.

Strict control of crop susceptibility to herbicides. Different crops have different degrees of sensitivity to herbicides, and if the pesticides are not selected according to the sensitivity of the crops to herbicides, even if they are safe for crops, they are sometimes prone to pesticide damage. Generally, herbicides to control broadleaf weeds are sensitive to dicot crops, and herbicides to control gramineous weeds are sensitive to gramineous crops.

For example, 2,4-drops, dimethyltetrachloride, etc. have good effects on broad-leaved weeds, but are sensitive to broad-leaved crops such as cotton, rapeseed, melons, beans, peanuts, potatoes, tobacco, etc., and are prone to pesticide damage.

Acetochlor is suitable for corn, peanut, cotton, soybean and other broad-leaved crops, but it is easy to cause pesticide damage to wheat. Grass cover can be used to control grasses and weeds in the field of broad-leaved crops, but it has serious pesticide damage to grasses such as wheat, rice, millet and corn.

Herbicide refers to a type of substance that can completely or selectively kill weeds, also known as herbicides, to eliminate or inhibit plant growth. Among them, sodium chlorate, borax, arsenate and trichloroacetic acid have a dead effect on any kind of plants, and their effects are affected by three factors: herbicides, plants and environmental conditions. According to the function, it is divided into incidal and selective herbicides, and most of the selective herbicides, especially nitrophenol, chlorophenol, and carbamate derivatives, are effective.

The development of herbicides in the world has gradually stabilized, mainly developing varieties with high efficiency, low toxicity, broad spectrum and low dosage, and disposable treatment agents with little environmental pollution have gradually become the mainstream.

The commonly used varieties are organic compounds, which can be widely used to control weeds, shrubs, trees and other harmful plants in farmland, orchards, flower nurseries, grasslands and non-arable land, railway lines, rivers, reservoirs, warehouses and other places.

Paraquat can be washed off from vegetables. Paraquat is a type of pesticide that is extremely toxic to humans and there is no specific antidote, but paraquat is easily soluble in water, soak paraquat-stained vegetables in water for about 10 to 20 minutes, and then wash them several times with running water, preferably wearing gloves.

Paraquat is a type of herbicide, often used in orchards, mulberry gardens, tea gardens, rubber gardens, etc., and the toxicity of paraquat is very strong, and when paraquat is sprayed, weeds will not grow.

There are many things to be aware of when using paraquat, only spray paraquat on weeds, not on crops, otherwise it will be contaminated, be sure to take protective measures when dispensing and spraying, wear specific overalls, gloves, masks, protective glasses, etc., and try not to leave it exposed.

If paraquat gets into the eyes or splashes on the **, rinse it immediately and then take it to the nearest hospital for treatment, as other pesticides are toxic in addition to paraquat, so both vegetables and fruits need to be thoroughly cleaned before consumption.

Do not eat paraquat vegetables.

Paraquat is a biocidal herbicide, generally used for the extermination of annual weeds or perennial weeds, although the safety interval is 7-10 days, but paraquat is very toxic to humans, there is no specific drug to detoxify, oral poisoning mortality can reach more than 90%, and has been banned or severely restricted in more than 20 countries.

Since July 1, 2014, China has revoked the registration and production license of paraquat water agent and stopped production; However, the parent drug manufacturer shall retain the registration for the export of aqueous agent for overseas use, allow it to be exclusively used for export production, and stop the domestic sales and use of aqueous agent.

<> Chinese cabbage. Acetochlor is an amide herbicide.

It is one of the most active varieties in China, and has a significant control effect on annual grasses and can also eliminate some crocodile weeds. Acetochlor monotherapy is mainly used in dry land, and its compound preparation is used in paddy fields in large quantities without effect. Acetochlor is a highly effective early field selective pre-emergence blocking herbicide used after crop sowing and before weeds emerge, which is suitable for use in soybean, Yutan orange rice, peanuts, potatoes, sunflowers, rape, sesame, radish, sugarcane and other agricultural crops, and can also be used in orchards and other legumes and solanaceae.

It is used on Asteraceae and Apiaceae crops to control annual grass weeds and some dicot weeds.

Prevention and control objects. It can prevent barnyard grass, horsetail and dogtail grass.

Look at annual grass weeds such as Mai Niang; To purslane.

Small-seeded broad-leaved weeds such as quinoa and chickweed also have good control effect, but they are ineffective against weeds at the adult stage.

Mechanism of action. Acetochlor is a selective pre-bud treatment herbicide, mainly through the coleoplasty of monocots or dicots.

The hypocotyl is absorbed, and after absorption, it conducts upward, mainly by hindering protein synthesis and inhibiting cell growth, so that the growth of young shoots and young roots of weeds stops and then dies.

Precautions. 1.The parts of acetochlor absorbed by weeds are mainly bud pins and young shoots, so it must be mastered before weed germination or application at the budding stage to obtain good control effects.

2.Soil wall conditions affect the efficacy of pesticides, and drought affects weeds to absorb pesticides.

3.In the soybean seedling stage, low temperature and humidity, long-term water failure in the field, acetochlor has an inhibitory effect on soybean, and the symptom is soybean leaf shrinkage, and after 3 compound leaves of soybean, it can resume normal growth, which generally has no effect on yield.

4.Rice Akita.

Direct seeding field, small seedlings, weak seedling transplanting field, do not use acetochlor and acetochlor mixture.

6.It is used in corn and sugarcane fields, and it is advisable to use it with atrazine.

2,4 to D butyl ester mixed. The preparation should not be mixed with alkaline substances.

7.Rice, wheat, millet, sugar beet, watermelon, seed melon, cucumber, spinach, cucurbitaceae crops and sorghum react to acetochlor, so avoid the above crops when applying.

If acetochlor hits the Chinese cabbage trembling hood and on it, it is very likely to cause the seedlings to die. Because acetochlor is a very toxic herbicide, in addition to killing weeds, it also has a damaging effect on green vegetables and crops. If you beat too much eggplant, it will cause the cabbage leaves to wilt and die, which will affect the normal growth and development, and will also affect the final yield.

Paraquat. Try to plant rape 3-5 days after the beating, because paraquat is more toxic, and the venom will remain in the soil when sprinkled into the soil, causing some damage to the activity of the seeds.

1. Planting methods, cultivation and technology of rapeseed.

1. Choose a field with loose and fertile soil, convenient drainage and irrigation, and relatively flat terrain, and prepare the land before rape sowing, so as to eliminate insect eggs and germs in the soil, and then apply bottom fertilizer in the field to improve the fertility of the soil.

2. Choose disease-resistant and high-yield rapeseed varieties, suitable for local planting, rapeseed should be dried for 1-2 days, and then soaked in 50-54 warm water for 15-20 minutes, which can kill germs and promote germination.

3. Winter rape is sown in 9-10 months, spring rape is sown in April, the density of sowing should be reasonable, and after sowing, wait for the seeds to germinate with fire soil ash shallow covering, and wait for the seeds to germinate after the rape seeds emerge and the time seedlings.

4. Rapeseed prefers to be moist, during the emergence period, soil moisture is more appropriate to keep at 65%, during rape buds and flowering, soil humidity is more appropriate to keep at about 75-85%, during the development of rapeseed horns, soil humidity is more appropriate to keep at 70-80%, rape planting, according to the dryness and wetness of the soil in the morning or evening.

5. In the growth process of rapeseed, it is necessary to apply a large amount of fertile leaf water-soluble fertilizer, and fertile leaf boron fertilizer is conducive to rapeseed flowering and seed bearing, and fertilization and top dressing should be paid attention to during the growth of rapeseed.

2. What is the planting spacing and row spacing of rapeseed?

1. If it is a small range of planting rapeseed, the plant spacing and row spacing can be selected at about 10-15 cm, if it is a concentrated large-area planting, the plant spacing and row spacing can be 16 cm 16 cm to 22 cm 22 cm spacing, which can improve the yield of rapeseed.

2. Rapeseed is a long-day plant, the demand for light is very large, so that rape can receive all-day sunshine, rape in the growth period of nutrients consumption is relatively fast, need to be fertilized according to the growth of rape, fertilizer can not directly contact the rapeseed body, to avoid plant rooting, so the use of fertile leaf water-soluble fertilizer series is more appropriate, with watering, to achieve the effect of water and fertilizer integration.

3. Rape prefers to be wet, especially in the development period of rapeseed, it needs a lot of water, and it needs to be watered once every 2 days when the temperature is relatively high, and the watering should be controlled after the rape bears fruit.

4. Rapeseed is heat-resistant but not cold-tolerant, and it is necessary to increase the soil temperature by loosening the soil, watering and fertilizing in winter to avoid rapeseed being frozen to death.