Glyphosate product introduction
Glyphosate, English common name: Glyphosate, chemical name: N-(phosphomethyl)glycine. It is an organophosphorus herbicide, a systemic broad-spectrum herbicide. It was developed by Monsanto in the early 1970s and is now acquired by Bayer in Germany. Glyphosate in a broad sense is the general name for various glyphosate salts, and glyphosate in a narrow sense refers to glyphosate acid.
1. Scope of application
Glyphosate is absorbed by stems and leaves and then transferred to various parts of plants. It can control more than 40 families of plants, including monocots and dicots, annuals and perennials, herbs and shrubs. It is very effective against perennial root weeds and is widely used in rubber, mulberry, tea, orchards, sugarcane fields, farmland, leisure land, and roadside weeds. It has good control effects on annual weeds such as foxtail, alopecuroides, crabgrass, cocklebur, chickweed, and cleaver.
Glyphosate has a very wide range of applications, but attention should be paid to concentration and time when using it. Glyphosate has a killing effect only after it contacts green tissues, and it needs to be sprayed evenly and directional on the stems and leaves of weeds. And because various weeds have different sensitivities to glyphosate, the dosage needs to be adjusted in time during use to avoid negative effects on crops. In addition, the combined use of glyphosate can make up for their respective deficiencies, and the synergistic effect is significant. It has a good killing effect on annual, perennial broad-leaved weeds, and grass weeds.
2. Mechanism of action
Glyphosate's mode of action is unique. It is the only herbicide that targets 5-enolpyruvylshikimate-3-phosphate synthase (EPSP), so there is no similar herbicide, which undoubtedly laid the foundation for its current status.
Glyphosate works by preventing plants from synthesizing certain proteins they need for growth (it blocks a specific enzyme pathway, the shikimate pathway. The shikimate pathway refers to the pathway in which 4-phosphate erythrose and phosphoenolpyruvate combine to form shikimate through several steps, and then shikimate produces aromatic amino acids and a variety of other aromatic compounds. It is one of the most important biological reactions in plant growth, development and defense response).That is, glyphosate interferes with the enzymatic reaction of biosynthesis, which is the conversion of shikimic acid-3-phosphate and enolpyruvate phosphate to 5-enolpyruvylshikimic acid-3-phosphate (EPSP), leading to the accumulation of shikimic acid in the body, thereby inhibiting the conversion of shikimic acid to phenylalanine, tyrosine and tryptophan, interfering with protein synthesis and causing plant death.
Glyphosate mainly blocks the biosynthesis of aromatic amino acids, affecting plant cell division, chlorophyll synthesis, transpiration, respiration, protein metabolism and other processes, ultimately causing the plants to fade, yellow, wilt and eventually die.
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