Which herbicides are harmful to the next crop

The use of herbicides is very technical, and if you are not careful when choosing herbicides, it will bring pesticide damage to the next crop, and seriously cause no harvest of grains. To this end, we will introduce some herbicides that are harmful to crops

1. Corn cannot be planted in the stubble that has used Pust (micaotobacco, imidazole ethylnicotinic acid), chloramisulfuron (beancaulon, beansulfuron), metsulfuron (effective ingredient more than 1 gram per mu), and green and yellow long (effective ingredient more than 1 gram per mu).

2. If chlorsulfuron-methyl, Yunongle (nicosulfuron, the effective ingredient per mu exceeds 4 grams), simazine (the effective ingredient per mu exceeds 150 grams), and atrazine (the effective ingredient per mu exceeds 133 grams) are used in the previous stubble, peanuts cannot be planted in the next stubble.

3. If the previous stubble has used Pusted, chlorsulfuron, Yu Nongle (more than 4 grams of effective ingredients per mu), broadoxalin (zolsulfachlor, more than grams of effective ingredients per mu), and mesulfuron (more than grams of effective ingredients per mu), sorghum cannot be planted in the next stubble.

Fourth, if the effective ingredient of chlorsulfuron per mu exceeds 1 gram, the effective ingredient of simazine per mu exceeds 150 grams, the effective ingredient of atrazine per mu exceeds 133 grams, and the effective ingredient of pyroxapyronium (Pine isospura) per mu exceeds 48 grams, wheat and barley cannot be planted in the next stubble.

5. If the effective ingredient of sulfafen (Huwei) per mu exceeds 25 grams, the active ingredient of metsulfuron per mu exceeds 1 gram, the effective ingredient of chlorsulfuron per mu exceeds 1 gram, and the effective ingredient of dichloroquinoline acid per mu exceeds 7 grams, and rape cannot be planted in the next stubble.

Nowadays, some herbicides are inevitably used in the crop planting process, and then some herbicides cannot be applied in the planting process of crops, otherwise there will be very serious adverse effects. The old man can not plant all crops except rice within 300 days after using the barnyard quickly, green beans and cigarettes within 12 months, and tomatoes and carrots within 2 years. In addition, umbrella flower crops such as carrots, lettuce, and fragrant are very sensitive to fast-killing barnyard and cannot be irrigated with water from rice fields that have been applied to fast-kill barnyard crops.

Chlorsulfuron-methyl: It has a long retention time in the soil environment, and the stubble is not suitable for seed bulbs, rice, potatoes, melon vegetables, vegetables and fruits, sorghum rice and cotton.

Saike (methazine, azinone): According to the test report, 420 1120 grams of cyke with active ingredients per acre (15 mu) can be planted after 4 months before alfalfa, cocoon, wheat, wheat seeds, bract, potatoes, sweet potatoes, sweet potatoes, soybeans, and sedge green fodder; After 8 months, rice and cotton can be planted, and after 12 months, other crops can be planted except tubers. At this stage, it is generally highly recommended that the application amount of Saike is 210 560 grams of active ingredient per mu, which is safe and reliable for later crops under normal conditions.

Guangfen: It is reported that 560 1400 grams of active ingredient can be used to plant rice, cotton, bud rice, Chaotian pepper, cigarettes, and cucurbitaceae crops 9 months after application with 560 1400 grams of active ingredient per mu (15 mu); After 16 months, the entire crop can be planted. At this stage, it is generally recommended to mix the demand of wide extinguishing with others, and there is no other harm to the crop after stubble, but heavy spraying has a slight harm to wheat.

Sbot: A highly effective herbicide. According to reports, 70 grams of active ingredient per mu of Sbot can be planted with wheat, lentils, and alfalfa 4 months after application; After about 9 and a half months, wheat seeds and cigarettes can be planted; After 18 months, you can plant wild rice, cotton, potatoes and sorghum rice; Brussels sprouts can be planted after 40 months.

Broad grass: It dissolves quickly in alkaline soils and dissolves slowly in acidic soils. If you plant cabbage, rapeseed, and cotton on farmland where broad grass is used, be sure to plant at least 2 years apart.

This pesticide can not be used, the efficacy of this pesticide is very good, and it is not suitable for crops.

Amine herbicides must not be used, otherwise such crops cannot be grown for a long time.

It is highly toxic, will affect crops, and is easy to cause pesticide damage, which cannot be used, otherwise it will affect the yield of crops.

At this time, do not choose dicamba, do not choose the liquid macro with strong efficacy, and also choose the right herbicide according to the crop climate and irrigation conditions and requirements.

Herbicides play an important role in crop growth, but not all herbicides can be used during crop growth, and some herbicides should be used with caution and prohibited. Here are some herbicides to use on future crops. No crops other than rice should be planted within 300 days after application, eggplant and tobacco should not be planted within 12 months, and tomatoes and carrots, celery, and coriander should not be planted within 2 years.

560-1400 grams of active ingredients can be planted per hectare (15 acres), rice, cotton, corn, pepper, tobacco, cucurbitaceae crops can be planted after 9 months of application, and all crops can be planted after 16 months of application. At present, it is generally recommended that the dosage of methanol be mixed with other drugs, and there is no effect on subsequent crops, but respraying has a slight effect on wheat. If one crop cannot be planted on the same plot of land for two consecutive years, other crops should be planted first and replanted after the growing season is over.

In some places, a crop is planted for three consecutive years, but other crops cannot be planted continuously within three years.

In addition, rice and soybean should be applied in a timely manner according to local ecological conditions and the needs of agricultural development. Rice disease and pest control is mainly carried out at the rice panicle stage, booting stage, flowering and grain filling stage. The main control of rice planthopper stage is to control rice planthoppers.

The harm of rice planthopper to rice, mainly to the rice ear and other ears, the harm to rice is mainly to the harm of rice grains, rice planthopper is a physiological disease, with strong contagiousness, not only to rice, but also to rice.

Only through technological innovation and improvement can we achieve long-term, green and healthy agricultural production and contribute to the sustainable development of global agriculture. Agricultural ecology is a part of the natural environment, and the ecological and environmental problems arising in the natural production process not only involve natural attributes such as natural ecological balance and biodiversity, but also include various ecological activities in the ecosystem, and its impact on the environment cannot be ignored in the process of agricultural production.

With 560 1400 grams of active ingredient per hectare (15 acres), rice, cotton, corn, pepper, tobacco, and cucurbitaceae crops can be planted 9 months after application, and all crops can be planted after 16 months. At present, it is generally recommended to mix the dosage of Guang Ze with other drugs, and there is no effect on the crop after stubble.

The herbicide that needs to be kept away from is the fast barnyard herbicide, because this herbicide can cause very serious damage to crops and can also damage the health of the land.

Be sure to stay away from some herbicides that contain strong pesticides, because such pesticides will have great harm to the body and will also have a great impact on crops.

It is necessary to avoid strong potencies, and then you can't use those that will pollute the land or pollute crops, and then you must choose the right herbicide according to the crops, and you should also pay attention to the use rate.

Herbicides have the potential to affect crops.

In general, grasses weed herbicides have no effect on broadleaf crops, and broadleaf weed herbicides have no effect on grasses.

Precautions for using herbicides:

1. Herbicides should be prepared and used in strict accordance with the prescribed dosage, method and appropriate period.

1) The sown bush can not wait until the seedling is applied before the seedling, and the agent suitable for soil treatment cannot be used as a stem and leaf treatment. For example, fluoralin is a soil treatment agent and cannot be used as a stem and leaf treatment.

2) The medication should be appropriate. The application of herbicides during the sensitive period of crops is easy to cause pesticide damage to crops. For example, the herbicide use period in wheat field is from 4 leaf stage to jointing stage.

3) When treating stems and leaves, spraying at the 2nd to 6th leaf stage of weeds has the best effect.

2 Pay attention to the direction of the wind.

When spraying herbicides, the direction of the spray hole should be consistent with the wind direction, and the direction should be perpendicular to the wind direction or the central angle should not be less than 45 degrees, and the wind head should be sprayed first, and then the wind head should be sprayed to prevent the liquid medicine from drifting with the wind and harming the nearby sensitive crops.

3 Pay attention to weather conditions.

Herbicides should not be sprayed in high temperature, high humidity or windy weather to prevent pesticide damage to crops or reduce their efficacy. Generally speaking, herbicide spraying should be carried out in sunny and windless weather with a temperature of 10 to 30 °C.

4 Soil treatment.

The plot of soil treatment must be raked finely and evenly sprayed, otherwise the efficacy of the drug will be reduced.

5 Choice of Potions.

Chemical control of perennial weeds, to increase the dosage, some contact herbicides are ineffective against perennial weeds, should pay attention to the selection of use.

6. Appliance cleaning.

The sprayer for spraying herbicides must be thoroughly cleaned before spraying other drugs to prevent pesticide damage to crops.

It works, but the effect on crops is not very large, and generally the herbicide can only fully exert its effective effect two to three hours after spraying.

Herbicides are chemicals that kill weeds or harmful plants without affecting the normal growth of crops. It can be used to control weeds in farmland or kill weeds or shrubs on non-agricultural land.

According to its action characteristics, it can be divided into selective herbicides and biocidal herbicides, selective herbicides refer to the use of a certain dose and concentration range, can selectively kill some kinds of plants, and other kinds of plants are harmless.

Herbicides have a certain amount of damage to crops, and they will cause great harm in the process of use. In general, herbicides have some effect on plants, pathogens, soil microorganisms, and the environment. And it will not only cause environmental pollution, but also indirectly cause harm to the human body.

Next, let me explain to you in detail what are the specific hazards of crops.

First, the harm of herbicides to the soil.

When the herbicide is sprayed on the field, the herbicide components that are not absorbed by the weeds are free to exist in the soil. Most of the chemical herbicides currently used are long-residue types, and the residue period in the soil can generally reach more than 36 months. According to surveys, 20% to 70% of herbicides commonly used in production will remain in the soil for a long time, contaminating soil, groundwater and food.

The quality of the soil is declining, and the "cancer" of the land is what people call a "cancer field". In Northeast China, Heilong, Lijiang, Jilin and other places, due to the long-term overuse of herbicides, a large area of "cancer fields" has emerged.

Second, the toxicity of technology to plant harm.

This technical phytotoxicity is mostly caused by improper use or selection of application doses, application periods, herbicide mixing, application equipment, etc. , Shirts.

Third, residual phytotoxicity.

Long-acting herbicides can be phytotoxic to the next crop during crop rotation and land transfer.

Third, drifting drug damage.

Some herbicides are highly drifting. When applied to a particular crop, they can easily drift onto neighboring crops, causing the phytotoxicity of drifting.

There is no impact. The herbicide itself is used to remove weeds. There is no chemical reaction between it and the concentration. Therefore, it has no effect on the poor crops, but it can remove the weeds in the corresponding fields.