Teflubenzuron, with the CAS number 83121-18-0, is a potent insect growth regulator (IGR). It is a white to light - yellow powder under normal conditions. The chemical formula of Teflubenzuron is C₁₆H₁₂ClF₂N₃O₃, and its molecular weight is approximately 383.73 g/mol. This product is typically supplied by factories at the best price, ensuring high - quality and cost - effective solutions for customers.
It has a melting point range of 195 - 202°C. Teflubenzuron is slightly soluble in water, with a solubility of about 0.02 mg/L at 25°C. It is soluble in organic solvents such as acetone, chloroform, and dichloromethane, which makes it suitable for formulating different types of pesticides.
Teflubenzuron is widely used in the agricultural industry. As an IGR, it plays a crucial role in pest control. It inhibits the synthesis of chitin, a key component in the exoskeleton of insects. When insects come into contact with or ingest Teflubenzuron, they are unable to form a proper new exoskeleton during molting. This leads to growth arrest and eventually death of the pests.
It is effective against a wide range of pests, including lepidopteran pests such as caterpillars, moths, and butterflies in crops like cotton, vegetables, fruits, and tea. In forestry, it can be used to control defoliating insects, protecting tree health and forest ecosystems. Additionally, it has applications in the control of pests in stored grains, preventing damage during storage and ensuring food quality.
1. **Formulation Preparation**: Teflubenzuron is usually formulated into emulsifiable concentrates, suspension concentrates, or wettable powders. Follow the instructions provided by the manufacturer to prepare the appropriate dilution. For example, when using an emulsifiable concentrate, measure the correct amount of the product and mix it thoroughly with water in a clean spray tank.
2. **Timing of Application**: Apply the product at the early stages of pest infestation. For lepidopteran pests, it is best to apply Teflubenzuron during the larval stage, as this is when they are most vulnerable to the effects of chitin synthesis inhibition.
3. **Application Method**: Use a suitable spraying equipment to apply the formulated product evenly on the target crops or areas. Ensure good coverage of the leaves, stems, and other plant parts where pests are likely to be present. For stored - grain applications, the product can be applied as a surface treatment or mixed with the grains.
4. **Safety Precautions**: Wear appropriate protective clothing, gloves, and a mask during the application process. Avoid contact with skin, eyes, and clothing. Wash hands and exposed skin thoroughly after handling the product.
1. **Cotton Crop Protection**: In a cotton - growing region, a large - scale infestation of cotton bollworms was detected. The farmers applied Teflubenzuron in the form of a suspension concentrate at a rate of 150 - 200 g/ha when the bollworm larvae were in the early instars. After 7 - 10 days, a significant reduction in the bollworm population was observed. The cotton plants showed less damage, and the yield increased by approximately 15 - 20% compared to the untreated fields.
2. **Vegetable Garden Pest Control**: A small - scale vegetable gardener noticed caterpillar damage on his cabbage and broccoli plants. He prepared a wettable powder formulation of Teflubenzuron according to the label instructions and sprayed it on the vegetables. Within a few days, the caterpillars stopped feeding, and the plants started to recover. The quality of the harvested vegetables was much better, with fewer holes and blemishes.
3. **Stored - Grain Protection**: A grain storage facility was facing a problem with grain moths. Teflubenzuron was applied as a surface treatment on the stored wheat. After several months of storage, the infestation rate of grain moths was significantly lower compared to the untreated storage areas. The grain quality was maintained, and there was less loss due to pest damage.
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