what are herbicides
Herbicide refers to a chemical that can completely or selectively die off weeds, also known as herbicide, a class of substances used to destroy or inhibit the growth of plants. Among them, sodium chlorate, borax, arsenate, and trichloroacetic acid have the effect of withering on any kind of plants, and their effects are affected by three factors: herbicides, plants and environmental conditions. Divided into biocidal and selective herbicides according to their functions, most of the selective herbicides, especially derivatives of nitrophenol, chlorophenol and carbamate, 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.
Commonly used varieties are organic compounds, which can be widely used to control weeds, weeds, weeds, trees and other harmful plants in farmland, orchards, flower nurseries, grasslands and non-cultivated land, railway lines, rivers, reservoirs, warehouses and other places.
A class of substances used by herbicides to kill or inhibit plant growth. All the plants that hinder the production, construction and life of human beings and need to be eradicated are collectively referred to as weeds. According to the survey, there are more than 30,000 kinds of weeds in the world, of which about 1,800 species can cause serious economic losses. It is estimated that crops around the world lose an average of 12% of their potential yield each year due to weeds (that have been manually or mechanically weeded). The most ancient method of man's fight against weeds is manual weeding or weeding, and mechanical weeding began in the early 20th century. These two methods not only consume a lot of labor and energy, but also have unsatisfactory results. After using chemical weeding methods, The problem of weed damage was basically solved. Chemical weeding methods are convenient, effective and economical, and have become an indispensable part of modern agricultural technology. The use of herbicides not only ensures high and stable agricultural yields, increases labor productivity and improves working conditions, but also promotes the innovation of cultivation techniques, such as the development of no-tillage and plastic film cultivation. In addition, herbicides are also widely used in weeding non-agricultural land, such as forests, grasslands, urban green areas, industrial sites, along traffic lines (railways, highways, airports), dykes, dams, ponds, etc.
