Fosamine ammonium
1. Chinese common name: regulating phosphine
2. English common name: Fosamine ammonium
3. Trade name: phosphine, arsenic, chlordane, phosphonium, etc.
4. Chemical name: ethyl carbamoyl phosphonate ammonium salt
5. Chemical structure:
6. Physical and chemical properties: pure product is white crystal, slightly minty, melting point 175 ° C, soluble in water, slightly soluble in methanol and ethanol, insoluble in chloroform, acetone, benzene, etc., decomposed under acidic conditions.
7. Toxicity: low toxicity
8. Category: Plant Growth Retardants
9. Main dosage form: 40% water agent
10. Functional characteristics: When the low concentration of phosphine is adjusted, it is a plant growth regulator, which can be absorbed by plants and enter the young part, inhibit cell division and elongation, make the plant type dwarf, and inhibit the growth of new shoots. The regulation of phosphine can also enhance the activity of peroxidase and indoleacetate oxidase in plants, accelerate the decomposition of endogenous auxin, inhibit vegetative growth, ensure the nutritional needs of reproductive growth, thereby increasing the fruit setting rate and increasing yield, and Various physiological effects such as pruning, dwarfing, sugar-increasing, and fresh-keeping.
High concentrations of modulating phosphine (15 000-60 000 mg/L) inhibit light and phosphorylation in plant photosynthetic reactions, thereby causing plants to lose energy and die, thus regulating phosphine is also a herbicide that can control impurities in forests. Shrubs and entwined plants (Convolvulaceae). The regulation of phosphine can inhibit the biosynthesis of endogenous ethylene in plants, prevent premature senescence of leaves, and is often used for cutting flowers. It can also be used for soil watering or foliar spraying, and is easily decomposed by microorganisms in the soil. It is generally treated 60 days before the fall, and can still inhibit the growth of buds in the spring of the next year. The effective period is 2 to 3 years.
11. Using technology
It can prevent the growth of citrus, peanuts, cotton, grapes, rubber, etc. It can also be used for cutting flowers and controlling the growth of shrubs.
(1) Inhibition of citrus summer shoots, sprayed with 1 000mg/L whole plant in June, can effectively inhibit the growth of summer shoots for about 20d.
(2) Spraying on the grapes can significantly increase the sugar content of the berries, and inhibit the growth of vegetative growth and control of the secondary shoots. The phosphating on the grapes is generally carried out after the swells of the berries, that is, the buds are sprayed 30 days before the berry formation. The concentration is preferably 500~1 000mg/L, and the whole plant is sprayed with a sprayer. Generally, it can be received by spraying once.
(3) To prevent the root pile from sprouting, the root section of the freshly cut root is treated with 5% aqueous solution, and the effect is ideal.
(4) Maintain water, soil and ecological balance. The use of phosphine can inhibit the growth of shrubs on some steep slopes. The length of inhibition can be adjusted by the dose.
12. Notes
(1) When using phosphine as a regulator, the concentration should be strictly controlled to prevent phytotoxicity. When the concentration is between 1 000 and 5 000 mg / L, the growth of the plant can be inhibited, and when the concentration is between 15 000 and 60 000 mg / L, the plant can be killed.
(2) The liquid must be mixed with clear water, turbid water or water with too much hardness will reduce the activity and affect the efficacy. When using, the liquid medicine is sprayed from the top of the plant from top to bottom, and the dosage and time of administration are determined depending on the application target and the application environment. It must be re-sprayed within 24 hours after application.
(3) Shrubs treated with phosphine are generally not more than 1.5 m, which is convenient for operation. Rainfall should be re-sprayed within 1 day after spraying.
(4) Do not use within 20 days before the leaves of the plants, so as not to prolong the dormancy period of the plants.
(5) Fruit trees can only be used to modulate phosphine for two consecutive years. In the third year, other regulators should be used to avoid affecting tree growth.
(6) The phosphine can not be mixed with acidic pesticides, but it can be mixed with glyphosate to enlarge the herbicidal spectrum, and the effect is long-lasting, the cost is reduced, and the environment is safe. If a small amount of toxin is added to the mixture and it is longer, the effect can be improved.
(7) Regulating phosphine is irritating to the eyes and skin. Pay attention when using it. Wash hands and face and exposed parts with soap after application. If you take it wrong, you should seek medical advice immediately. Use detoxification and first aid methods of organophosphorus pesticides. The phosphine is an ammonium salt, which is easy to corrode brass and spray parts. The drug should be cleaned immediately after use.
(Yuege Fertilizer Network comprehensive finishing, please indicate the source, please contact 13203809264 for details)
This article URL: Liu Gong said regulators | regulate phosphine efficacy and applicable crops
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