1. About Buprofezin
Buprofezin is an insect chitin synthesis inhibitor. It primarily works by inhibiting chitin synthesis in insects, interfering with their normal metabolism, and hindering the formation of new cuticles. This leads to deformed molting and slow death of nymphs. It is characterized by strong selectivity for pests, high insecticidal activity, long residual effect, low toxicity, and low dosage.
Buprofezin has strong contact and stomach poison effects and is commonly used for pest control in rice and vegetables. It can be used to control planthoppers, leafhoppers, whiteflies, cotton whiteflies, rice brown planthoppers, arrowhead scale, citrus mealybug, and red scale on various fruits and melons such as citrus, potatoes, rice, cucumbers, wheat, and tomatoes. It also has long-lasting killing activity against some coleopteran larvae and mites.
2. Product Characteristics
(1) Buprofezin has a strong contact poisoning effect on pests, and also has stomach poisoning effects. It is highly effective against young nymphs, but its effectiveness against nymphs older than the third instar decreases significantly. The recommended dosage cannot directly kill adults, but it can shorten their lifespan, reduce egg production, and prevent eggs from hatching normally. Even if larvae hatch, they die quickly, thus reducing the number of the next generation. Buprofezin has a certain penetrating ability in crops and can be absorbed by crop leaves or leaf sheaths, but it cannot be absorbed and transported by the roots.
(2) Buprofezin is a selective insecticide that inhibits insect growth and development. It is highly selective for pests and widely applicable to vegetables, rice, wheat, potatoes, citrus, cotton, tea trees, etc. It can effectively control leafhoppers and planthoppers on rice, leafhoppers on potatoes, whiteflies on citrus, cotton, and vegetables, and scale insects such as scale insects, scutellaria, and mealybugs on citrus. It is highly effective against whiteflies, planthoppers, leafhoppers, and scale insects, but ineffective against diamondback moths, cabbage caterpillars, and other lepidopteran pests.
(3) Buprofezin acts slowly and should be applied at the early stage of pest infestation when the density is low. Generally, nymphs begin to die 3-5 days after application when they molt, and the number of dead insects reaches its peak 7-10 days after application. The direct control period is generally about 15 days, and the total effective period can reach about one month. When the insect population density is high, it should be mixed with fast-acting pesticides. Buprofezin exhibits no cross-resistance with mainstream neonicotinoid and pyrethroid insecticides, and can be compounded with imidacloprid, acetamiprid, lambda-cyhalothrin, bifenthrin, chlorpyrifos, pymetrozine, etc.
3. Application Methods
(1) For controlling whiteflies and tobacco whiteflies on vegetables, use a 1000-2000 times dilution of 20% Buprofezin wettable powder and spray evenly. For controlling tea green leafhoppers, black spiny whiteflies, and gall mites, during the non-harvesting period of tea leaves and when the pests are in their early instars, use a 1000-1200 times dilution of 25% Buprofezin wettable powder and spray evenly.
(2) To control rice white-backed planthoppers and brown planthoppers, use 50-80 grams of 25% Buprofezin wettable powder per mu (approximately 0.067 hectares), diluted in 60 kg of water, and spray evenly. Spray once during the peak hatching period of the main generation and the preceding generation, and again during the peak emergence period of young nymphs, focusing on the middle and lower parts of the plant.
(3) To control citrus scale insects and whiteflies, use 800-1200 times diluted 25% Buprofezin suspension. Spray before the emergence of scale insects such as arrowhead scale insects, at the early stage of nymphal emergence, or at the initial peak of whitefly emergence. The spray solution should be evenly distributed.
Precautions
(1) Buprofezin should not be mixed with alkaline or strongly acidic pesticides; it should not be used repeatedly, continuously, or in high doses. A maximum of two applications per season is recommended. Alternate or mix with pesticides with different insecticidal mechanisms to delay the development of pesticide resistance in pests.
(2) Buprofezin has no systemic action; therefore, it must be sprayed evenly and thoroughly. It should not be used on cabbage or radishes, as this can easily cause phytotoxicity such as brown spots or whitening of green leaves.
(3) Buprofezin is toxic to silkworms and some fish species. It is prohibited in mulberry gardens, silkworm rearing rooms, and surrounding areas. When using it, care should be taken to avoid contaminating rivers, ponds, lakes, and other water sources.
