Weeding mechanism: Paraquat can be quickly absorbed by the green tissues of plants, producing peroxide in plants, which has a strong destructive effect on the green tissues of plants, quickly stopping photosynthesis and chlorophyll synthesis and making them die, thus achieving the weeding effect.
Main ingredients: the preparation consists of active ingredients, wetting agent, dye and emetic *
Characteristics of action: non-selective quick-acting contact herbicide
Usage: Directional spraying
Appearance: dark blue green water-soluble liquid
Stability: stable under acidic and neutral conditions, can be hydrolyzed by alkali and decomposed by ultraviolet rays.
Zhencaoning
Other names: Zhencaoning, Nongda, Nongda, MON-0573, Phosphoric acid, Glyphosate 197 1 Developed by Monsanto Company of the United States.
Scientific name: N- (phosphonomethyl) glycine is an organophosphorus herbicide.
Physical and chemical properties: the pure product is a non-volatile white solid with a specific gravity of 0.5 and a melting point of about 230℃, accompanied by decomposition. The solubility in water at 25℃ is, insoluble in general organic solvents, and its isopropylamine salt is completely soluble in water. Non-flammable, non-explosive and stable at room temperature. It is corrosive to medium carbon steel and galvanized iron sheet (tinplate).
Pathogenesis: The conversion of shikonin to phenylalanine, tyrosine and tryptophan was inhibited by inhibiting allyl acetophenone shikonin phosphate synthase in plants, which interfered with the synthesis of protein and led to plant death. After being buried in soil, glyphosate quickly combines with iron and aluminum ions and loses its activity, which has no adverse effect on seeds and microorganisms in soil. Low toxicity to people and livestock, and safe to fish, birds and natural enemies.
Toxicity: Glyphosate is a low toxic herbicide. The acute oral LD50 of the raw powder is 4300mg/kg for rats and 5000 mg/kg for rabbits. It has mild irritation to rabbit eyes and skin, and has no allergic and irritating effect on guinea pig skin. Glyphosate does not accumulate in animals and has no teratogenic, mutagenic and carcinogenic effects on animals under experimental conditions. Low toxicity to fish and aquatic organisms, no toxicity to bees and birds, and safety to natural enemies and beneficial organisms.
Uses: It is a non-selective systemic herbicide with high efficiency, low toxicity, broad spectrum and lethality. Weeds are absorbed by stems and leaves and transmitted to the whole plant, which makes weeds die and decompose quickly in the soil. They can only be treated as stems and leaves, and are effective against 1 annual and perennial weeds, such as imperata rhizome and Cyperus rotundus. It is suitable for controlling 1 annual and perennial gramineous weeds, Cyperaceae weeds and broadleaf weeds in leisure fields, fields, highways and railways.
Characteristics: Glyphosate is absorbed by stems and leaves and delivered to all parts of plants, which can control more than 40 families of plants such as monocotyledonous and dicotyledonous plants, annual and perennial plants, herbs and shrubs.
Usage and dosage: glyphosate can be used for weeding orchards, mulberry orchards, tea gardens, rubber orchards, sugarcane orchards, vegetable gardens, cotton fields, ridges, highways, railways, irrigation and drainage ditches, airports, oil depots and open spaces, and can control almost all annual or perennial weeds.