Pyrethroid Chemistry and Pest Spectrum
Cypermethrin (IRAC Group 3A) acts as a modulator of voltage-gated sodium channels in insect nerve membranes. By preventing sodium channels from closing properly, it causes repetitive nerve firing, rapid tremors, feeding paralysis, and death.
Its fast contact action flushes and knocks down mobile caterpillars within minutes of application.
- Cotton: American bollworm (Helicoverpa armigera), spotted bollworm, and pink bollworm.
- Vegetables: Shoot and fruit borer in brinjal, diamondback moth in cabbage, and fruit borer in tomato.
- Pulses: Gram pod borer in chickpea and pigeonpea.
- Ovicidal properties: Destroys freshly laid insect eggs directly upon contact, preventing larval hatching.
Application Standards and Pollinator Protection
Because Cypermethrin is potent at low application rates, precise measurement and uniform canopy spray are essential.
Applicators must follow safety protocols near water channels, as synthetic pyrethroids are toxic to fish and beneficial insects.
- Calibrate spray equipment to ensure thorough droplet deposition across upper and lower canopy surfaces.
- Avoid spraying during active crop bloom to protect foraging honeybees and other pollinators.
- Wear personal protective gear including chemical gloves, goggles, apron, and face mask during handling.
- Observe the registered pre-harvest interval (PHI) before picking fresh vegetables or harvesting crops.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the active ingredient in Super Killer 25?
Super Killer 25 contains Cypermethrin 25% EC, a broad-spectrum synthetic pyrethroid insecticide.
How quickly does Cypermethrin knockdown pest caterpillars?
It acts as a neurotoxin that paralyzes feeding caterpillars within minutes upon direct contact or ingestion.
Can Cypermethrin be sprayed when crops are in full bloom?
No, it is toxic to honeybees; avoid spraying during active flowering or when pollinators are actively foraging.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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