Pyriproxyfen is an inhibitor of insect chitin synthesis, which interferes with the molting process of pests, preventing larvae from completing the growth process. The active ingredient Pyriproxyfen was first introduced in the United States in 1996.
* Overview
• Chemical name: 4-Phenoxyphenyl (R/S)-2-(2-pyridyloxy) propyl ether 2-[1-(4-Phenoxyphenoxy) propan-2-yloxy] pyridine
• Chemical formula: C20H19NO3
• Molecular weight: 321.376g.mol-1
• Density: 1.2 g/cm3
• Melting point: 48 – 50oC
• Boiling point: 318oC
• Solubility in water: 0.367 mg/l
• Toxicity group II: Acute toxicity LD50 for rats >5000 mg/kg. Skin and eyes Acute dermal LD50 for rats >2000 mg/kg. Does not cause skin and eye irritation (rabbits).
Mechanism of action
• Pyriproxyfen works by mimicking the adult hormone in insects, it disrupts the insect's hormone system, helping to prevent the development of eggs into larvae and transformation into adult insects to prevent insects from reproducing.
• This mechanism disrupts the insect's development cycle, causing a reduction in the number of harmful insects in the environment.
* Advantages and Disadvantages
- Advantages
• Pyriproxyfen is a powerful insect growth inhibitor. It prevents the development and egg laying of insects from the egg stage to the adult stage. Thereby, helping to reduce the number of harmful insects.
• Pyriproxyfen is an active ingredient that helps control insects sustainably compared to some other pesticides, it is not harmful to the aquatic environment and other living organisms.
• This active ingredient can be used in many different types of products, in different forms such as: mist, cream, ... to help apply more flexibly and effectively.
- Disadvantages
• The cost may be higher than some other pesticides.
• Regular use can cause some types of insects to become resistant to the drug, reducing the control of harmful insects.
Application
• Currently, Pyriproxyfen is used to kill aphids, mealybugs, leafminers, nematodes, whiteflies on coffee, rice, oranges and roses.
• In addition, in medical and veterinary medicine, Pyriproxyfen is used to control household pests such as flies and mosquitoes, but also to prevent and eliminate fleas on cats and dogs.
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