About cypermethrin
Cypermethrin chemical name
(RS) -alpha-cyano-3-phenoxybenzyl (SR) -3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate
Will cypermethrin kill bed bugs?
Pyrethroid insecticides. It has the characteristics of broad spectrum, high efficiency and quick response. It is mainly used for contact killing and stomach poisoning. It is suitable for pests such as Lepidoptera and Coleoptera, which is not good for mites. It has a good control effect on cotton, soybean, corn, fruit trees, grapes, vegetables, tobacco, flowers and other pests such as aphids, cotton bollworm, Spodoptera litura, scale insects, curlers, beetles, weevil and other pests. And other crops.
Cypermethrin mode of action
The insecticidal mechanism of
cypermethrin is mainly to change the permeability of insect nerve membranes and interfere with ion channels, thereby inhibiting nerve conduction, causing pests to have dyskinesia, convulsions, paralysis and death. The main effect on pests is contact killing, but also gastric poisoning and egg-killing effects. There are avoidance effects at lethal concentration, but no fumigation and systemic effects.
Cypermethrin synthesis
Permethrin chloride, aldehyde and sodium cyanide react in the presence of a phase transfer catalyst. Operation method: Add 3.4g of 3-phenoxybenzaldehyde (content 87.40%), 3.0g of permethrin chloride (content 95.8%) and an appropriate amount of solvent to the reaction flask, and keep the temperature at 20 ° C under vigorous stirring. Hereinafter, 0.85 g (0.0163 mol) of sodium cyanide, 0.27 g of sodium carbonate, and a phase transfer catalyst (benzyltriethylammonium chloride or m-phenoxybenzyltriethylammonium chloride) were added dropwise and dissolved in 6.5 mL of saline solution in water. After dripping, the temperature was raised to 45-50 ° C, and the reaction was stirred for 5 hours. The aqueous phase was separated and extracted once with a small amount of toluene. The organic phases were combined, washed with water until neutral, and a light yellow cypermethrin was obtained after dissolution, with a yield of 93%.
Cypermethrin uses
Cypermethrin for bed bugs
Pyrethroid insecticides. It has the characteristics of broad spectrum, high efficiency and quick response. It is mainly used for contact killing and stomach poisoning. It is suitable for pests such as Lepidoptera and Coleoptera, which is not good for mites. It has a good control effect on cotton, soybean, corn, fruit trees, grapes, vegetables, tobacco, flowers and other pests such as aphids, cotton bollworm, Spodoptera litura, scale insects, curlers, beetles, weevil and other pests. And other crops.
Cypermethrin for veterinary
Cypermethrin is used in agriculture to control ectoparasites that infect cattle, sheep and poultry. In veterinary medicine, it can effectively control dog lice.
Products with cypermethrin
Cypermethrin pesticide
Cypermethrin has a broad insecticidal spectrum, and has a good effect on larvae of Lepidoptera. It also has a good effect on pests such as Diptera, Hemiptera, Orthoptera, but the target rhinoids and some scale insects are not good, and they are not good for mites invalid. It can be mixed with a variety of organophosphorus and urethane insecticides, which can expand the insecticidal spectrum, synergize and delay the resistance of pests.
Cypermethrin spray
The usual dosage is 0.3 ～ 0.9g / 100m2. For example, to control cotton bollworm and red bollworm, during the egg incubation period, larvae are sprayed with 1000-1500 times of 10% EC before spraying into buds and bolls; citrus pests are sprayed with 30-100mg / L concentration; Spray at 25-50mg / kg concentration. Be careful not to use it near mulberry gardens, fish ponds, water sources, bee farms.
Cypermethrin side effects
Cypermethrin toxicity
Cypermethrin is a broad-spectrum insecticide that can be inhaled by particulate pollutants, ingested, or absorbed by skin contact. Toxicity is moderate, irritating to eyes and skin.
Cypermethrin toxicity to humans
Can enter the body from the respiratory tract, digestive tract, skin. Skin absorption is particularly important when applying in the field. Cypermethrin is mainly hydrolyzed and oxidized by the liver, and metabolites are excreted quickly. Cypermethrin is a neurotoxic pesticide. It affects the cytochrome C and the electron transfer system, prolongs the depolarization of nerve membrane action potentials, and causes repeated action potentials in peripheral nerves, causing continuous muscle contraction. Cypermethrin carcinogens; abnormal skin sensation with tingling and burning sensation; oral cypermethrin (to 140 mg / kg) can cause moderate poisoning. Toxicity is moderate, irritating to eyes and skin. It has no teratogenic, mutagenic and carcinogenic effects on animals within the test dose.
Cypermethrin toxicity prevention
(1) Respiratory system protection: It is recommended to wear a self-priming filter-type gas mask when contacting farmland spraying operations.
(2) Eye protection: It is recommended to wear goggles.
(3) Skin protection: Wear appropriate protective clothing and chemical-resistant gloves.
(4) Others: Smoking, eating and drinking are prohibited at the work site. After work, shower and change clothes to maintain good hygiene.
Cypermethrin and other products
Cypermethrin vs permethrin
Cypermethrin has a broad spectrum of insecticidal effects, rapid action, stable light and heat, higher drug properties than permethrin, and long-lasting effect.
Cypermethrin vs bifenthrin
In addition to the general properties of pyrethroid insecticides, bifenthrin has the main feature of good control of various leaf moths, and can be used to control pests and red spiders when insects and moths concur. Toxicity to humans and animals is equivalent to cypermethrin, which is moderately toxic, but it is very easy to accumulate in living organisms and affects endocrine.
Cypermethrin toxicity prevention
(1) Respiratory system protection: It is recommended to wear a self-priming filter-type gas mask when contacting farmland spraying operations.
(2) Eye protection: It is recommended to wear goggles.
(3) Skin protection: Wear appropriate protective clothing and chemical-resistant gloves.
(4) Others: Smoking, eating and drinking are prohibited at the work site. After work, shower and change clothes to maintain good hygiene.
Cypermethrin vs deltamethrin
Deltamethrin has contact, stomach, and repellent effects. The insecticidal spectrum is wide and the knockdown speed is fast. Its insecticidal virulence is 5-10 times greater than other pyrethroids. It is a neurotoxic agent that can cause insects to over-excitate, paralyze and die.
Summary
After pesticide application, 80% will enter the environment, especially in the soil. Correlation analysis showed that there was a significant negative correlation between the available nitrogen content in soil and the half-life of cypermethrin. Long-term partial application of nitrogen fertilizer could increase the content of available nitrogen in the soil, which could significantly reduce the degradation rate of cypermethrin in the soil.
The Cypermethrin Rapid Test For Agricultural Products kit provided by
BALLYA can effectively detect the presence of Cypermethrin residue in agricultural products. This kit is not only simple to operate, but also has a short test time and high accuracy, and the test results comply with EU standards. Can effectively ensure the safety of agricultural products.
