Active ingredient and mode of action
- Triflumezopyrim belongs to the novel mesoionic insecticide chemical class.
- Acts on insect nicotinic acetylcholine receptors (nAChR), blocking nerve impulses and leading to immediate feeding inhibition.
- Fast knockdown prevents hopper burn damage and reduces secondary transmission of viral diseases in paddy.
Target pests and crop application
- Labeled primarily for brown planthopper (Nilaparvata lugens) and white-backed planthopper (Sogatella furcifera) in transplanted and direct-seeded rice.
- Recommended for application at the early nymphal surge when hoppers cross economic threshold levels (typically 5 to 10 hoppers per hill).
- Direct the spray nozzle toward the base of the paddy plants where planthoppers congregate.
Safety and application guidelines
- Follow label dosages recommended by the Central Insecticides Board & Registration Committee (CIBRC).
- Always wear protective equipment, including gloves and face mask, while handling and spraying.
- Maintain an appropriate spray volume with clean water to ensure thorough coverage of the plant canopy base.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the active ingredient in Pexalon?
Triflumezopyrim 10% SC, a mesoionic class insecticide.
Which pests does Pexalon control?
It specifically targets brown planthoppers (BPH) and white-backed planthoppers (WBPH) in paddy.
Where should Pexalon be sprayed on rice plants?
Spray directed towards the lower base of the paddy hills where planthoppers feed and multiply.
What safety precautions should farmers take?
Use standard personal protective equipment, follow approved label rates, and observe the prescribed pre-harvest interval.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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