Unique antifeedant mode of action
Pymetrozine does not rely on direct neurotoxic knockdown; it interferes with the mechanical coordination of sucking mouthparts.
- Stylet Paralyzer: Paralyzes the insect's cibarial pump mechanism within 15 to 30 minutes of contact or sap ingestion.
- Immediate Damage Cessation: Pests cannot pierce plant tissues, immediately halting sap drainage and viral transmission.
- Mortality by Starvation: While feeding stops immediately, insect death occurs over 2 to 4 days due to dehydration and starvation.
- Translaminar and Systemic Action: Absorbed by leaves and translocated acropetally to protect newly expanding foliage.
Target crops and major pest spectrum
Approved under CIBRC standards for major cereal, commercial, and vegetable crops.
- Rice (Paddy): Brown plant hopper (Nilaparvata lugens) and white-backed plant hopper (Sogatella furcifera).
- Cotton: Cotton aphids (Aphis gossypii) and whiteflies.
- Vegetables: Aphids and whiteflies in tomato, chilli, cabbage, and cucurbits.
- Favorable safety profile toward natural predators like spiders, mirid bugs, and predatory beetles.
Spraying technique and resistance management
Correct application technique ensures chemical reaches the lower plant stems where hoppers aggregate.
- Direct the spray nozzle toward the base of paddy hills where brown plant hoppers congregate and lay eggs.
- Ensure adequate spray water volume (typically 200 liters per acre) for thorough lower canopy coverage.
- Apply when hoppers reach economic threshold levels (5 to 10 hoppers per hill).
- Rotate with alternate modes of action (such as Flonicamid or Triflumezopyrim) to prevent resistance development.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
How does Pymetrozine stop brown plant hopper damage in paddy?
Pymetrozine paralyzes the insect's salivary pump and mouthparts within minutes, preventing further sap sucking and virus transmission.
Why do hoppers remain on the plant after Pymetrozine spraying?
Insects stop feeding immediately but remain temporarily attached to stems until they die of dehydration and starvation over 48 to 72 hours.
Is Pymetrozine safe for beneficial spiders in rice fields?
Yes, Pymetrozine has high selectivity for sucking insects and exhibits very low toxicity toward predatory spiders and mirid bugs in paddy ecosystems.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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