New Insecticide Pymetrozine
What is pymetrozine?
Pymetrozine is a non-biocide insecticide belonging to the pyridine or triazone class of insecticides. It shows excellent control effect on piercing-sucking mouthparts pests of various crops. Pymetrozine has a contact effect on pests and also has systemic activity. In plants, it can be transported in both xylem and phloem, so it can be used as a foliar spray or as a soil treatment. Thanks to its good transporting properties, new shoots and leaves can also be effectively protected after spraying the stems and leaves. The molecular formula of pymetrozine is C10H11N5O, Cas 123312-89-0, the molecular weight is 217.227, and it is a colorless crystal.
Physical and chemical properties of pymetrozine
Appearance of pymetrozine: white crystalline powder.
Cas 123312-89-0
Melting point: 234°C.
Vapor pressure (20°C): < 9.7 × 10-3pa.
Solubility (20°C, g/l): water, 0.27; ethanol, 2.25; n-hexane, <0.01.
Stability: Stable to light and heat, stable under weak acid and weak base conditions.
Mechanism of action of pymetrozine
The research of the insecticide pymetrozine using electropenetration graph (EPG) technology shows that, no matter in drip, feeding or injection experiments, as soon as aphids or planthoppers come into contact with pymetrozine, the stylet blocking effect will almost immediately occur and stop immediately Feed, and eventually starve to death, and this process is irreversible. Therefore, pymetrozine has an excellent function of blocking insect transmission. Although the mechanism of stylet blockage caused by pymetrozine is still unclear, existing studies have shown that this irreversible "stopping food" is not caused by "antifeeding effect". The initial mortality of insects treated with pymetrozine is very low, and the insect "hungry moth" can still survive for several days before death, and the mortality rate is related to climatic conditions. Tests have shown that within 3 hours of chemical treatment, the feeding activity of aphids is reduced by about 90%, and 48 hours after treatment, the mortality rate can be close to 100%.
Pymetrozine Features
Insecticide pymetrozine has strong selectivity - this product has excellent selectivity to some important natural enemies or beneficial insects, such as the natural enemy of the cotton bollworm, the seven-spot ladybug, the common lacewing, the leafhopper and the natural enemy of the planthopper family spiders and other beneficial insects Almost harmless.
Excellent systemic activity of the insecticide pymetrozine—leaf test shows that its systemic activity (LC50) is 2-3 times that of pirimicarb, and more than 140 times that of cypermethrin.
The insecticide pymetrozine can control resistant strains of pests such as peach aphids resistant to organophosphate and carbamate insecticides.
Pymetrozine application technique
Dosage of the insecticide pymetrozine: to control vegetable aphids and greenhouse whitefly, use 5 grams per mu; to control wheat aphids, use 50% pymetrozine WDG5-10 grams per mu; %Pymetrozine WDG15-20 grams; to control cotton aphids, use 50% pymetrozine WDG20-30 grams per mu; to control fruit tree peach aphids and apple aphids, it can be formulated as 2500-5000 times liquid spray.
Insecticide pymetrozine spraying method: the dosage per mu is mixed with 30 kg of water for conventional spraying or mixed with 10 kg of water with a misting machine.
The scope of application of the insecticide pymetrozine: vegetables, wheat, rice, cotton, fruit trees.
Insecticide pymetrozine control range: aphididae, planthoppers, whiteflies, leafhoppers and other pests, such as cabbage aphids, cotton aphids, wheat aphids, green peach aphids, small green leafhoppers, brown planthoppers, gray Planthopper, white-backed planthopper, sweet potato whitefly and greenhouse whitefly, etc.
Precautions: When spraying, it should be even and thoughtful, especially for the harmful parts of the target pests.
Transmission of pymetrozine virus
Control of piercing-sucking pests is extremely important in order to minimize direct damage from pest feeding and the spread of plant viruses.
In potato, pymetrozine is highly active against all important aphids. Harrewijin et al. evaluated the effectiveness of pymetrozine in reducing the transmission of persistent potato leafroll virus (PLRV) and non-persistent potato virus Y (PVY). After the aphids were exposed to the PLRV-infected potato plants for 24 hours or the PVY-infected plants for 1 hour, respectively, the aphids were transferred to virus-free potato plants sprayed with pymetrozine solution. It was found that pymetrozine could reduce PLRV transmission by 97% and PVY transmission by 75%. Although pymetrozine had no inhibitory effect on the acquisition of non-persistent virus PVY, it did reduce transmission to subsequent healthy plants by 65%. This means that on pymetrozine-treated plants, aphids initially exhibited normal stylet probing behavior, but when pymetrozine exerted its effect, aphids were inhibited from feeding on the plant phloem, which resulted in the spread of PLRV through the plant phloem The phenomenon is significantly reduced.
In another study, starved adult green peach aphids were exposed to non-persistent soybean common mosaic virus (BCMV) and the aphids were transferred to plants sprayed with pymetrozine. Aphids not treated with pymetrozine could effectively infect 87.5% of healthy plants, while aphids treated with pymetrozine were susceptible to 64.6% of normal plants and 38.3% of plants sprayed with pymetrozine.
Properties and action characteristics of pymetrozine
The insecticide pymetrozine is 25% pymetrozine suspension concentrate. It is a new type of heterocyclic high-efficiency selective insecticide. It has strong systemic property and can be well absorbed by crops. various parts of the crop. Its mode of action is unique, and it has no direct knockdown activity on pests. Once an insect comes into contact with the agent, it can immediately block the insect stylet and stop feeding. This process is irreversible. Before it dies due to stopping feeding Handling insects may behave normally within a few days. It is precisely because of the unique mechanism of action of pymetrozine that it has no interaction with the agents used in large quantities in previous production; and it is highly selective (only effective for piercing and sucking insects), and it is effective for mammals, birds, Fish and shrimp, bees, non-target arthropods, etc. all have good security. In addition, pymetrozine and its main metabolites have very low leaching in soil and only exist in the topsoil, so there is little possibility of polluting groundwater at the recommended dosage.
How pymetrozine works
Regardless of drip, feeding or injection experiments, as soon as aphids or planthoppers come into contact with pymetrozine, they will almost immediately produce a stylet blocking effect, stop feeding immediately, and eventually starve to death, and this process is irreversible. Therefore, pymetrozine has an excellent function of blocking insect transmission. Although the mechanism of stylet blockage caused by pymetrozine is not yet clear, existing studies have shown that this irreversible "stopping food" is not caused by "antifeeding effect". The initial mortality of insects treated with pymetrozine is very low, and the insect "hungry moth" can still survive for several days before death, and the mortality rate is related to climatic conditions. Tests have shown that within 3 hours of chemical treatment, the feeding activity of aphids is reduced by about 90%, and the mortality rate is close to 48 hours after treatment.
The insecticide pymetrozine has contact killing effect on pests and also has systemic activity. In plants, it can be transported in both xylem and phloem; therefore, it can be used as a foliar spray or as a soil treatment. Thanks to its good transporting properties, new shoots and leaves can also be effectively protected after spraying the stems and leaves.
Dosage: To control vegetable aphids and greenhouse whitefly, use 5 grams per mu; to control wheat aphids, use 50% pymetrozine WDG5-10 grams per mu; to control rice planthoppers and leafhoppers, use 50% pymetrozine WDG515- per mu 20 grams; to control cotton aphids, use 50% pymetrozine WDG520-30 grams per mu; to control fruit tree aphids and apple aphids, it can be sprayed with 2500-5000 times liquid.
Casting method: Mix 30 kg of water per mu for conventional spraying or 10 kg of water with a mist misting machine.
Effect of pymetrozine
Pymetrozine is a common insecticide, can it be used in the control of agricultural pests? The role of pymetrozine, what is the role of pymetrozine, the following for everyone to introduce.
Pymetrozine is a new type of pyridine heterocyclic insecticide, which has the characteristics of low toxicity, high selectivity, and environmental ecology. Its preparations can be used to control most of the Homoptera pests, especially the Aphididae whitefly family and leafhoppers. Branch etc. It is suitable for vegetables, rice, melons and fruits and various field crops.
Objects of action of pymetrozine: Pymetrozine is a new type of non-destructive insecticide. Its preparations can be used to control most of the homoptera pests, especially pests of the family Aphididae, Whitefly, Leafhopper and Planthopper. Vegetables, ornamental plants, hops, deciduous fruit trees, citrus, rice, cotton and a variety of field crops. It can also control all important aphids on potatoes to control the occurrence of potato virus diseases. The duration of action of pratozoarone is more than 20 days.
The properties and functional characteristics of the insecticide pymetrozine: 25% pymetrozine suspension concentrate is a new type of heterocyclic selective insecticide, which has strong systemic property and can be well absorbed by crops. The effect is spread to all parts of the crop. Its mode of action is unique, and it has no direct knockdown activity on pests. Once an insect comes into contact with the agent, it can immediately block the insect stylet and stop feeding. This process is irreversible. Before it dies due to stopping feeding Handling insects may behave normally within a few days. It is precisely because of the unique mechanism of action of pymetrozine that it has no interaction with the agents used in large quantities in previous production; and it is highly selective (only effective for piercing and sucking insects), and it is effective for mammals, birds, Fish and shrimp, bees, non-target arthropods, etc. are all good sex. In addition, pymetrozine and its main metabolites have very low leaching in soil and only exist in the topsoil, so there is little possibility of polluting groundwater at the recommended dosage.
Recommended application method of pymetrozine: Pymetrozine can be used to control various aphids and whitefly on vegetable fields and ornamental plants. The recommended dosage for controlling aphids is 10g(a.i.)/hm2; the recommended dosage for controlling whitefly is 20g(a.i. )/hm2; it can be used to control cotton aphid and green peach aphid on tobacco, cotton and potato crops, the recommended dosage is 100-200g(a.1)/hm2; on rice, the dosage for stem and leaf treatment is 100-150g(a.i. )/hm2; 1.5g(a.i.)/hm2 of seed coating can control black-tailed leafhopper; on citrus and deciduous fruit trees, the dosage of 5-20g(a.i.)/hm2 is effective against aphids.
How to use pymetrozine
1. Root irrigation: Pymetrozine has good systemic activity. In plants, it can be transported in both xylem and phloem. When planting, use 25% pymetrozine wettable powder 1000 times to irrigate the roots, which can effectively control aphids, planthoppers, whiteflies and other pests. Up to about 50 days.
2. Spraying: To control pests such as vegetable aphids, whiteflies, rice planthoppers, leafhoppers, etc., use 50% pymetrozine water dispersible granules 15-20 grams per mu. After spraying, the pests will die slowly after feeding. The average is about 60% in the last 3 days, and it can reach more than 95% in 7 days after taking the medicine. And the duration of validity is more than 25 days.
As a new type of high-efficiency insecticide, pymetrozine has many advantages such as high efficiency, low toxicity, environmental protection, greenness, unique mechanism of action, long-lasting effect, etc., and has become one of the plant protection expert pesticides. Pymetrozine can be used to control most Homoptera pests. Especially for pests of Aphididae, Whiteflyidae, Leafhoppers and Planthoppers, the duration of the drug is more than 20 days. The mechanism of action of the drug is that adults, after contacting the nymphs, will have a stylet blocking effect, stop feeding, and starve. And die, not contact stomach poison. The mortality rate is not high 1-2 days after taking the medicine, and it takes 2 days to gradually reach the peak of death, and some individuals even take 5-7 days to die.
Pymetrozine also has a gradual upward trend in the prevention and treatment of planthoppers, but some people do not understand the mechanism of action of the drug. They found that the mortality rate was not high after 1-2 days after the drug, mistakenly thinking that the drug is ineffective, and eager to switch to other agents for blind supplementation. Therefore, when using pymetrozine to control rice planthoppers, it is recommended to use 24 grams (3 packs) of 25% pymetrozine suspension concentrate + 25% memocarb EC 150g Or + 25% Zhongbuwei emulsifiable concentrate 150g For a well-balanced agent, the amount of water to be mixed is not less than 50 kg, and it is evenly sprayed during the peak period of nymphs to achieve long-term effects and reduce the cost of medication.
Pymetrozine has a wider insecticidal spectrum (compared to imidacloprid, acetamiprid, etc.), and can control most piercing-sucking pests on corn, but the effect is slightly slower, about 5 days, but the duration of effect is longer!
Note: Chewing pests are not acceptable, and must cooperate with others!
Each pack of this product is mixed with 15kg of water and sprayed evenly. Mixing this product with chlorpyrifos, isoprocarb and other agents can improve the quick kill.
Dosage and usage of pymetrozine
Dosage of the insecticide pymetrozine: to control vegetable aphids and greenhouse whitefly, use 5 grams per mu; to control wheat aphids, use 50% pymetrozine WDG5-10 grams per mu; 50% pymetrozine WDG515-20 grams; to control cotton aphids, use 50% pymetrozine WDG520-30 grams per mu; to control fruit tree aphids and apple aphids, it can be sprayed with 2500-5000 times liquid.
The application method of the insecticide pymetrozine: the dosage per mu is mixed with 30 kg of water for conventional spraying or 10 kg of water is used for misting with a misting machine.
Difference Between Pymetrozine and Imidacloprid
1. Pymetrozine is compounded by two insecticides with different mechanisms of action, pymetrozine and nitenpyram; pymetrozine has a unique stylet blocking effect, and the pests quickly inhibit eating once they eat; nitenpyram Amines can quickly block the transmission of pest nerves. The combination of the two can effectively control rice planthoppers.
2. Imidacloprid is a nitromethylene-type systemic insecticide. It is the acting body of the nicotinic acid acetylcholinease receptor. It acts quickly and has a good control effect on piercing-sucking pests such as rice planthoppers.
3. Imidacloprid is a super-efficient neonicotinoid insecticide with broad-spectrum, high efficiency, low toxicity, and low residue. It is not easy for pests to develop resistance, and it is safe for humans, animals, plants, and natural enemies. It also has contact, stomach, and Inhalation and other multiple functions. After the pests are exposed to the pesticide, the normal conduction of the central nervous system is blocked, causing them to paralyze and die. The product is quick-acting, and has a high control effect one day after application, and the residual period is as long as about 25 days. The efficacy and temperature are positively correlated, the higher the temperature, the better the insecticidal effect. It is mainly used to control piercing-sucking mouthparts pests.
4. Pymetrozine has contact killing effect on pests, and also has systemic activity. In plants, it can be transported in both xylem and phloem; therefore, it can be used as a foliar spray or as a soil treatment. Thanks to its good grooming properties, new growth is also effectively protected after spraying the stems.
Precautions for pymetrozine
1. The safe interval for rice is 7 days, and it should be used twice a season.
2. This product is poisonous to bees, fish and other aquatic organisms and silkworms. During the application period, the influence on the surrounding bee colonies should be avoided. It is forbidden to use nectar source crops during flowering period, silkworm rooms and mulberry gardens. It is forbidden to raise rice fields, apply pesticides away from aquaculture areas, and it is forbidden to wash pesticide application equipment in rivers and other water bodies.
3. Wear protective clothing and gloves when using this product to avoid inhaling the liquid medicine. Do not eat or drink during application. After spraying, clean the equipment thoroughly, bury or incinerate the packaging bag, and wash hands and face with soap immediately.
4. This product is poisonous to melons, lettuce seedlings and tobacco, and the drug solution should be prevented from drifting to the above crops.
5. Do not mix with alkaline pesticides and other substances. In order to delay the development of resistance, it can be used in rotation with other insecticides with different mechanisms of action.
The price of the insecticide pymetrozine
Usually, the price of the pesticide pymetrozine will be affected by raw materials, market environment, research and development costs, etc. If you want to know the latest price of the pesticide pymetrozine you need, please contact us to initiate an inquiry.
Tel: 13563082345 Email: sales@agripesticide.com
Suppliers of the insecticide pymetrozine
Agripestcide is a professional agrochemical manufacturer, providing herbicides, insecticides, microbial fungicides, plant growth regulators and other products. If you are looking for Pesticide Insecticide Pymetrozine, please feel free to contact us for latest price.