Benzoylurea Insecticide Hexaflumuron
What is Hexaflumuron (86479-06-3)?Hexaflumuron is a benzoyl urea insecticide, a chemical that is soluble in acetone and methylene chloride and has stable chemical properties. It is a chitin synthesis inhibitor with high insecticidal and ovicidal activity and is fast-acting, especially for the control of cotton bollworm. Mainly used for cotton, potatoes and fruit trees to control a variety of Coleoptera, Diptera and Homoptera insects. For example, we can control various pests such as golden moth, peach leafminer, leaf roller, thorn moth, and peach borer on jujube, apple, pear and other fruit trees, and control citrus leafminer.
The pure product of the insecticide Hexaflumuron is white crystal with a melting point of 226.5°C and Cas 86479-06-3. It is insoluble in water and soluble in polar solvents. Stable to light. The full chemical name of Hexaflumuron is: 1-[3,5-dichloro-4-(1,1,2,2-tetrafluoroethoxy)phenyl]-3-(2,6-difluorobenzyl) Acyl)urea, also known as lidworm powder. Hexaflumuron insecticide is suitable for the control of various lepidopteran pests in crops such as vegetables, cotton, fruit trees, and forest trees, and hasgood effects on pests that are resistant to organophosphorus, carbamates, and pyrethroids.
Hexaflumuron (86479-06-3) Physical and Chemical Properties
The insecticide Hexaflumuron is a colorless solid with a melting point of 202°C to 205°C. Solubility: water 0.027mg/L (18℃), methanol 11.3g/L (20℃), xylene 5.2g/L (20℃). Within 35 days (pH9) 60% will be hydrolyzed.
Physicochemical properties of Hexaflumuron (86479-06-3)
[Melting point (℃)] 202～205
【Vapor pressure (Pa)】0.059mPa (25℃)
[Character] Colorless (or white) solid.
[Solubility] Solubility (20°C): 0.027 mg/L in water (18°C), 11.9 mg/L in methanol, 5.2 g/L in xylene.
Hexaflumuron (86479-06-3) toxicity
Rat acute oral LD50>5000mg/kg, mouse LD50>2000mg/kg; rat acute dermal LD50>2000mg/kg (>5000mg/kg); rat acute inhalation LC50>2.5mg/L (4h). The no-effect dose for rats is 75 mg/kg per day for 2 years, and the no-effect dose for dogs is 0.5 mg/kg per day for 1 year. Skin sensitization test was negative. Animal tests have shown no teratogenic or mutagenic effects. Rainbow trout LC50>32×10-9 (96h). The oral LD50 of bees is 0.1 mg/bird; it is highly toxic to silkworms and fish.
Hexaflumuron (86479-06-3) pharmacological effects
Hexaflumuron is a benzoyl urea insecticide. Inhibits the synthesis of insect chitin, hinders the normal molting growth of insects, and inhibits the molting and feeding speed of pests. It has high insecticidal and ovicidal activity and is fast-acting. Used to control various Coleoptera, Diptera and Homoptera insects on cotton, potatoes and fruit trees.
Hexaflumuron (86479-06-3) Features
Hexaflumuron has the characteristics of benzoyl urea insecticides, but has special effects on cotton bollworm pests, hence the name "Hexaflumuron". Mainly used for cotton, potatoes and fruit trees to control a variety of Coleoptera, Diptera and Homoptera insects. For example, we can control various pests such as golden moth, peach leafminer, leaf roller, thorn moth, and peach borer on jujube, apple, pear and other fruit trees, and control citrus leafminer. It mainly has stomach poisoning effects on pests, and has both contact killing and antifeedant effects. After treatment, the amount of leaves eaten by the larvae is greatly reduced, and basically no longer causes harm. The insecticidal effect will appear in 3-5 days, and the drug effect will reach its peak after 7 days. Lasts for 15 days. Products include 5% emulsifiable concentrate, etc.
Hexaflumuron (86479-06-3) uses
1. A benzoylurea insect growth regulator. Its mechanism of action is to inhibit the formation of chitin, hinder the normal molting and metamorphosis of pests, and also inhibit the eating speed of pests. It has the characteristics of high insecticidal activity, wide insecticidal spectrum, strong knockdown power and quick effect. It can prevent and control Coleoptera, Diptera, Lepidoptera and Homoptera pests on cotton and fruit trees, and has ovicide activity. It is particularly effective against pests such as cotton bollworms, but is ineffective against mites. Used to control cotton bollworm and pink bollworm during the egg hatching period and before the larvae penetrate the buds and bolls, spray with 1500-2000 times of 5% EC.
2. It can effectively prevent and control various pests on cotton, vegetables, fruit trees, forest trees and other crops.
The third genus of benzoylurea insecticides kills pests by inhibiting chitin synthesis in insects. Use 4: Hexaflumuron is a specific insecticide with high insecticidal activity and broad insecticidal spectrum. It can be used for It controls a variety of lepidopteran pests in vegetables, cotton, fruit trees, forest trees and other crops, and has good effects on pests that are resistant to organophosphorus, carbamates, and pyrethroids, but is highly toxic to silkworms, fish, etc. .
Hexaflumuron (86479-06-3) Application
The insecticide Hexaflumuronis a new type of acylurea insecticide. In addition to having the insecticidal characteristics of other acylurea types, it has a wide insecticidal spectrum. It is especially effective against pests of the genus Helicoverpa armigera. It is also effective against gypsy moths, canopy caterpillars, and fir trees. It is effective against noctuid pests such as poisonous moths, Spodoptera exigua, and Spodoptera exigua, but is ineffective against mites. It has strong knockdown power, faster insecticidal effect than other acylurea, and has high contact egg-killing activity. It can be used alone or mixed. The application period is not strict and can control pests that have developed resistance to organophosphorus and pyrethroids. It is a benzoylurea insect growth regulator that kills pests by inhibiting chitin synthesis in insects. It has the characteristics of high insecticidal activity, wide insecticidal spectrum, strong knockdown power and quick effect. Its mechanism of action is to inhibit the formation of chitin, hinder the normal molting and metamorphosis of pests, and also inhibit the eating speed of pests. It can prevent and control Coleoptera, Diptera, Lepidoptera and Homoptera pests on cotton and fruit trees, and has ovicide activity. It is particularly effective against pests such as cotton bollworms, but is ineffective against mites. Used to control cotton bollworm and pink bollworm during the egg hatching period and before the larvae penetrate the buds and bolls, spray with 1500-2000 times of 5% EC.
The insecticideHexaflumuroncan control a variety of pests such as Coleoptera, Lepidoptera, Diptera, and Homoptera on cotton, vegetables and fruit trees. Special effect on cotton bollworm.
(1) Vegetable pests: To control diamondback moth, spray evenly with 1,000-2,000 times of 5% EC per acre during the egg hatching period and the 1st to 2nd instar larvae period. To control cabbage caterpillars, spray evenly with 2,000-3,000 times of 5% EC during the 2nd to 3rd instar larvae stage.
(2) Fruit tree pests: To control pests such as fruit tree goldenrod, leaf roller, thorn moth, peach borer, etc., you can use 5% EC 1 000 to 2 000 times liquid or 20% suspension during the peak hatching period of eggs or the young larval stage. Spray 8 000 to 10 000 times of the agent evenly, and the efficacy can be maintained for more than 20 days.
The pesticide fluHexaflumuron is used in combination with other active ingredients, such as a pesticide composition containing pyriproxyfen and fluHexaflumuron. The active ingredients are pyriproxyfen and fluHexaflumuron; the quality of pyriproxyfen and fluHexaflumuron The ratio is 1-40:40-1. Both pyriproxyfen and fluchloruron are insect growth regulators, but their mechanisms of action are different. Pyriproxyfen is a juvenile hormone analog, which disrupts the hormone balance in insects; fluflumuron is a chitin synthesis inhibitor and has the ability to inhibit Chitin synthase activity hinders larval molting.
Mixing the two has an obvious synergistic effect on the 4th instar larvae of the leek nectar mosquito. It not only improves the insecticidal virulence, but also greatly saves the dosage of pyriproxyfen and Hexaflumuron, thereby greatly reducing the amount of pyriproxyfen and flufenac. The residual amount ofHexaflumuronin leeks and other vegetable products. In addition, there are studies that disclose a synergistic insecticide composition containing fipronil and flufluuron and its preparation method, which is characterized by containing the active ingredients fipronil, flufluuron and additives. Based on weight, the content of fipronil is 0.5~4%, the content of Hexaflumuron is 1~8%, and the content of additives is 88~98.5%. The additives are solvents and emulsifiers.
After the raw materials are added to the enamel stirring tank and mixed evenly, a creamy synergistic insecticide composition containing fipronil and Hexaflumuron is prepared. Fipronil is used in combination with flufluuron, which has low toxicity, low residue, broad insecticidal spectrum, good quick and long-lasting effects, and low cost. It is an ideal pesticide variety for preventing and controlling vegetable pests.
Hexaflumuron (86479-06-3) is suitable for crops
The insecticideHexaflumuronis used to control lepidopteran pests, such as cabbage caterpillar, diamondback moth, beet armyworm, cabbage moth, tobacco worm, cotton bollworm, goldenrod, leaf miner, leaf roller, Bridge insects, borer borers, thorn moths, caterpillars, etc.
Hexaflumuron (86479-06-3) prevention and control targets
A variety of plants such as cotton, tomatoes, peppers, cruciferous vegetables, apples, peaches, and citrus can be used.
How to use Hexaflumuron (86479-06-3)
1. The insecticide Hexaflumuron controls various pests such as golden moth, peach leafminer, leaf roller, thorn moth, and peach borer in jujube, apple, pear and other fruit trees. It can be used during the peak hatching period of eggs or the young larval stage. Spray with 1000 to 2000 times of 5% emulsifiable concentrate, and the efficacy can last for more than 20 days.
2. To control citrus leafminer, the insecticide flufluuron can be sprayed with 1000 times of 5% emulsifiable concentrate during the peak hatching period of the eggs.
3. The insecticide flufluuron is used to control vegetable pests such as diamondback moth, exigua exigua, Spodoptera litura, cutworm, etc., 40-70 ml of 5% EC per mu is used to control cabbage caterpillar, and 30-50 ml of 5% EC is used per mu; To control bean borer, use 50-70 ml of 5% EC per mu and spray 40-60 kg of water. The efficacy can last for 10-15 days.
4. To control fruit tree pests such as citrus leafminer, apple moth and apple moth, spray with 50% EC 1500-2000 times.
5. To control cotton bollworms and pink bollworms, use 70-100 ml of 5% EC per mu and spray with water; or spray with 1500-2000 times of 50% EC to control bridge-building insects, leaf rollers, etc.
6. Use 5% EC 1000-2000 times to spray pine caterpillars and brown-tailed poisonous moths in forestry. It is highly toxic to silkworms and fish, so be careful not to contaminate mulberry leaves and water sources when using it.
Hexaflumuron (86479-06-3) for fruit trees
① To control various pests such as golden moth, peach miner, leaf roller, thorn moth, and peach borer on jujube, apple, pear and other fruit trees, 1000-2000 times 5% can be used during the egg hatching period or the young larval stage. When sprayed with EC + 1000 times "Tianda 2116" (special type for fruit trees), the efficacy can last for more than 20 days.
② To prevent and control citrus leafminer, spray 1000 times of 5% EC + 1000 times of "Tianda 2116" (special for fruit trees) liquid during the peak hatching period of the eggs.
③ To control pests such as cotton bollworms and heartworms on jujube, apple and other fruit trees, spray 1000 times of 5% EC + 1000 times of "Tianda 2116" (special for fruit trees) liquid during the peak hatching period of eggs or before the first hatching larvae enter the fruit.
Hexaflumuron (86479-06-3) phytotoxicity problem
1. Phytotoxicity causes white spots and albino spots, which are irreversible. However, it seems that after a period of time (about half a month), the phytotoxicity will become less obvious. It is mainly manifested in cruciferous vegetables. Cruciferous vegetables are inherently very toxic. If you are sensitive, especially in the seedling stage, it is recommended to use a smaller dosage.
2. The insecticide Hexaflumuron is relatively safe on cotton and has no problem on rice. The dosage on cotton should be controlled to 15 ml per bucket of water. Pay attention to the dosage when the temperature is high. It is easy to cause phytotoxicity on cotton, especially in June and July when the temperature is high and the sun is strong. Use it as little or as little as possible. The dilution factor should be less than 1000 times (5%). If you use too much on cotton, it will be harmful. Phytotoxicity may occur, especially when mixed with phoxim.
3. The harm caused by the pesticide Hexaflumuron is mainly determined by the performance of the agent itself, but it is also related to the dosage form type and dilution factor. Good dosage forms can reduce the occurrence of pesticide harm to a certain extent. The medicine is good, but there are too many uncontrollable factors. This may be the main reason why this medicine has not been widely recognized and promoted.
Hexaflumuron (86479-06-3) Precautions
①For leaf-eating pests, pesticides should be applied at the young larval stage. Boring pests should be sprayed during the peak egg-laying and egg-hatching periods. This agent has no systemic or penetrating properties, and the spray must be even and thorough.
②Do not mix with alkaline pesticides. But it can be mixed with other pesticides to achieve better control effects.
③ It is highly toxic to fish and silkworms, so be particularly careful.
How effective are benzoylurea insecticides such as benzofluoruron,Hexaflumuron(86479-06-3) and difenthiuron
The insecticide Hexaflumuron is a benzoyl urea insecticide. It is a type of insect growth regulator that can inhibit the chitin synthesis of target pests and cause their death or sterility. It is known as the third generation insecticide. Or new insect control agents, which mainly act on parts synthesized by chitin, such as the epidermis, egg shells, and mouthparts of pests. They have the characteristics of inhibiting the hatching of insect eggs, destroying larval molting, and interfering with adult egg laying. The key point is that humans and animals do not have chitin, so this type of pesticide is safe for humans.
There are four differences between the three in terms of activity, safety, duration of effect, and quick effect.
1. During the prevention and control period, grasp the word "young". The best effect is to use pesticides in the first larval stage of insects. The older the insect is, the greater the lethal dose of food and medicine will be, and the worse the control effect will be. Therefore, the best period for controlling the golden midge moth is from the period when overwintering adults and first-generation adults flourish to the hatching period of first- and second-generation larvae, until leaf miners, leaf rollers, heart-eating insects, etc. enter the leaves, burrow into the fruit, or form cysts. The effect will be poor if sprayed after the insect has been infected. It will be more difficult to control when the generations cross. We should "wait for the medicine to be eaten by the worms" rather than "use medicine when the worms are seen".
2. When spraying, highlight the word "even". The insecticidal mechanism of chloruronide insecticides is to inhibit the chitin synthesis of insect epidermis, so that after the insect larvae take the medicine, they cannot form new epidermis and cannot shed their skin and die. It is mainly gastric poisoning, and can also invade the epidermis of insects and eggs, but has no systemic effect. Therefore, it must be eaten by the bugs to be effective. The eggs of the golden gnat moth are laid on the underside of leaves, and the first-instar larvae bite small openings on the underside of the leaves and sneak into the leaves to cause harm. If the spray cannot reach the underside of the leaves, the control effect will be very poor. In terms of control effect, the ovicide effect of fenturamide is better than that of fenHexaflumuron 3. When spraying on the back side of plant leaves, the newly laid eggs of the golden midge moth will die, as well as the unhatched eggs, so the word "even" must be emphasized when spraying.
3. Concentration, emphasizing the word "accurate". Although benzuron is an efficient and safe insecticide, it is insoluble in water and has extremely low solubility in most organic solvents, making it difficult to process into emulsifiable concentrate or ultraviolet. Low volume oil. At present, most of the profenthiuron and profenthiuron on the market are suspension agents. When using, shake the medicine in the bottle well, dilute it with a small amount of water, then add water to the required concentration, stir well and then spray. If the spraying concentration is too high and the droplets are too large, it will have a repellent effect on pests. For 25% chloride suspension, it is generally better to spray 1500 times the solution.
4. Mixing, the word "alkali" is taboo. Methylbenzuron reagents cannot be mixed with alkaline substances. They can be mixed with general acidic or neutral medicaments without reducing the efficacy. When chlorbenzuron is mixed with other pesticides, some drugs can cause chlorbenzuron to develop cross-resistance to pests, and some can cause it to develop negative resistance. Plant-based synergists can make it synergistic and inhibit it. The role of resistance. Adding 300 times the urea solution to the benzene chloride agent will make the mist droplets smaller and reduce the volatilization rate of the agent by 25%-33%.
5. For compounding agents, beware of the word "cheating". Since chloruril agents are not fast-acting insecticides, they have poor contact killing effect and no systemic effect. The effect of the drug will gradually increase and become obvious within 3-5 days after application. Some fruit growers mistakenly believe that the medicine is not effective. Some pesticide manufacturers mix chlorbenzuron with quick-acting insecticides, which loses the meaning of applying chlorbenzuron. This type of compound agent is quite deceptive and should be paid attention to to avoid being fooled.
Advantages: relatively high safety and relatively low cost of use
Disadvantages: lowest insecticidal activity, relatively narrow killing spectrum
Positioning: Mainly used for the prevention of leafminer pests in fruit trees (golden moth, peach leafminer, etc.).
Hexaflumuron
Main uses: It is a new type of acylurea insecticide. In addition to the insecticidal characteristics of other acylurea types, it has a wide insecticidal spectrum, especially effective against pests of the genus Helicoverpa armigera. It has good effect on noctuidae pests such as Spodoptera exigua and Spodoptera exigua, but is ineffective against mites.
It has strong knockdown power, faster insecticidal effect than other acylurea, and has high contact egg-killing activity. It can be used alone or mixed. The application period is not strict and can control pests that have developed resistance to organophosphorus and pyrethroids. It is a benzoylurea insect growth regulator that kills pests by inhibiting chitin synthesis in insects. It has the characteristics of high insecticidal activity, wide insecticidal spectrum, strong knockdown power and quick effect. Its mechanism of action is to inhibit the formation of chitin, hinder the normal molting and metamorphosis of pests, and also inhibit the eating speed of pests. It can prevent and control Coleoptera, Diptera, Lepidoptera and Homoptera pests on cotton and fruit trees, and has ovicide activity. It is particularly effective against pests such as cotton bollworms, but is ineffective against mites.
Used to control cotton bollworm and pink bollworm during the egg hatching period and before the larvae penetrate the buds and bolls, spray with 1500-2000 times of 5% EC.
Advantages: Strongest activity, fastest insecticidal effect
Disadvantages: lowest safety, easy to cause chemical hazards if used improperly, relatively expensive to use
Positioning: Suitable for controlling hidden pests on crops that are not prone to phytotoxicity, such as cotton bollworm, fruit tree borer, and rice leaf roller
benzofen
Benzoylurea insecticides are chitin synthesis inhibitors. They act slowly, have no systemic effect, have a certain contact killing effect, and also have ovicide activity.
It can be used on corn, cotton, soybeans, fruit trees, forests, vegetables and other crops to control pest larvae of Coleoptera, Diptera, Lepidoptera, and Psyllidae, and to control boll weevils, diamondback moths, gypsy moths, house flies, and mosquitoes. , cabbage white butterfly, western cypress moth, potato leaf beetle, and can also be used to control termites.
The dosage of pharmaceutical is 0.561g/100m2. Fenuguron can hinder the formation of the exoskeleton of larvae during molting. There is not much difference in the sensitivity of larvae in different stages of the larvae, so it can be used in all stages of larvae.
Advantages: By optimizing the activity of Hexaflumuron, the safety of use is greatly improved. The activity is second only to Hexaflumuron and much higher than diHexaflumuron. The price is low, suitable for a variety of crops, and there are few competing products.
Disadvantages: The insecticidal speed is slightly lower than that of fluchloruron
Positioning: For example, fruit tree leaf roller/leaf miner, vegetable cabbage caterpillar/Beet armyworm, field crop corn borer/bean pod borer, etc.;
Precautions for use:
1. Cucumbers, tomatoes and other vegetables: apply medication 7-10 days after transplanting or at the 7-8 leaf stage
2. Corn and wheat: use after 7 leaves;
3. Cannot be used on mangoes
4. Mixed with foliar fertilizer: Dutch peas are sensitive during the seedling stage and carob pod stage.
5. It is strictly prohibited to use it in times of high sunshine and high temperature.
6. Before promoting crops, conduct small-scale tests based on local medication habits to ensure safety.
As a third-generation benzoyl urea insecticide, the biggest competitive advantage of benzofluoruron is that it has optimized the poor safety of the first and second generation benzoyl ureas. The use of benzofluoruron is relatively safe. , the difficulty of promotion is greatly reduced, which solves everyone’s concerns in this regard. Of course, while optimizing its safety, its insecticidal speed is slightly lower than that of Hexaflumuron, but its excellent insecticidal activity is still far superior to the first generation of chlorbenzuron and diHexaflumuron. In addition to its ability As an upgraded substitute for diHexaflumuron and diHexaflumuron in fruit tree areas, it can also be promoted on vegetables and fields to target Lepidopteran eggs and larvae.
Hexaflumuron (86479-06-3) insecticide price
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