What pesticides are specifically designed for weeding?

Herbicides refer to agents that can cause weeds to die completely or selectively, also known as herbicides, and are used to eliminate or inhibit the growth of plants.

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.

The commonly used varieties of herbicides 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.

Herbicides can be classified according to the mode of action, application site, compound** and other aspects.

Classified according to mode of action.

1) Selective herbicides: herbicides have different degrees of resistance to different kinds of seedlings, and this agent can kill weeds and be harmless to seedlings. Such as Gaicaoneng, Fluorin, Prometrinet, Simazine, Guoer herbicide, etc.

2) Herbicides: Herbicides are toxic to all plants, as long as they come into contact with the green part, regardless of seedlings and weeds, they will be damaged or killed. It is mainly used before sowing, before sowing and before emergence, and on the main and secondary roads of the nursery. Such as glyphosate, etc.

Herbicides are classified according to their movement through the plant.

1) Contact herbicide: When the agent is in contact with weeds, it only kills the part that is in contact with the agent, which plays a local killing role and cannot be conducted in the plant. It can only kill the aboveground part of the weed, and the effect is less effective on the underground part of the weed or perennial deep-rooted weed with underground stems.

Such as herbicidal ether, paraquat, etc.

2) Systemic conductive herbicide: After the agent is absorbed by the root system or leaves, bud sheath or stem, it is conducted into the plant and dies. Such as glyphosate, prometrinet, etc.

3) Systemic conduction and contact killing comprehensive herbicide: It has the dual functions of systemic conduction and contact killing, such as chloricidal and so on.

Classified according to chemical structure.

1) Inorganic compound herbicides: composed of natural mineral raw materials and compounds that do not contain carbon, such as potassium chlorate, copper sulfate, etc.

2) Organic compound herbicides: mainly synthesized from organic compounds such as benzene, alcohols, fatty acids, and organic amines. Such as ethers - gol, triazine benzene - prometriazine, substituted urea - herbicide No. 1, phenoxyacetic acid - 2 methyl 4 chloro, pyridine - capitonol, dinitroaniline - fluorin, amides - Lasso, organophosphates - glyphosate, phenols - sodium pentachlorophenol, etc.

Categorized by method of use.

1) Stem and leaf treatment agent: the herbicide solution is mixed with water, and the herbicide is evenly sprayed on the plant with fine droplets, and the herbicide used in this spraying method is called stem and leaf treatment agent, such as cover grass energy, glyphosate, etc.

2) Soil treatment agent: the herbicide is evenly sprayed on the soil in a certain thickness of the drug layer, when the young shoots, seedlings and roots of weed seeds are absorbed by contact and play a role in killing herbicides, this effect of herbicides, called soil treatment agents, such as simazine, prometrinet, fluoralin, etc., can be applied by spraying method, watering method, and poisonous soil method.

3) Stems and leaves, soil treatment agent: can be used as stem and leaf treatment, can also be used as soil treatment, such as atrazine, etc.

It depends on what kind of ground you are using, planting different crops, living plants and vegetables, using different herbicides, or don't use it, and it will be tragic if the crops in the field are also killed together.

<> common herbicidal pesticides are: acetochlor, alachlor, butachlor, butachlor, metolachlor, promechlor, pendimethalin, baicao, quinoxalin, 2methyl4chloro, imidazole ethylnicotin, sulfafen, isoxafen, chlorachlor, etc.

Herbicide pesticides include selective herbicides, biocidal herbicides, contact herbicides, inorganic compound herbicides, and systemic conductive herbicides, among which the selection of herbicides can kill weeds and be harmless to seedlings, while biocidal herbicides will kill weeds and seedlings, and glyphosate pesticides are more common.

Extended Materials. Buchlor.

Butochlor is a selective pre-emergence herbicide, mainly used for direct seeding or transplanting of annual grass weeds and some broad-leaved weeds in rice fields, and is also selective for wheat, barley, tung-foot sugar beet, cotton, peanut and cabbage crops.

The effective period is about 30 days, and one application can basically control the whole growth period of rice without weed damage.

Acetochlor. Acetochlor is a selective pre-emergence herbicide, suitable for soybean, peanut, corn, rape, sugarcane, cotton, potato, cabbage, radish, cabbage, orchard and other dryland crops pre-bud control of annual grasses and some dicotyledon weeds, soybean dodder seeds. The preparations include 90 Oxachlor EC, 50 acetochlor EC, 88 acetochlor EC and 20 acetochlor wettable powder.

There are many people who grow soybeans and peanuts and generally use acetochlor as a pre-planting herbicide.