Chemical Class and Ryanodine Receptor Mode of Action
Flubendiamide belongs to the phthalic acid diamide chemical class (IRAC Group 28), possessing a novel biochemical target site.
It binds specifically to insect ryanodine receptors, triggering continuous intracellular calcium release from the sarcoplasmic reticulum, causing muscle contraction, paralysis, and death.
- Active Molecule: Flubendiamide 20% WG (Water Dispersible Granules)
- Ryanodine Activation: Induces irreversible muscle paralysis in target lepidopteran larvae
- Rapid Feeding Cessation: Caterpillars cease feeding within 15 to 30 minutes of ingestion, halting crop defoliation immediately
- Translaminar & Rainfast: Quickly absorbed into leaf cuticles, providing high rainfastness and protecting leaf undersides
Target Crops and Severe Lepidopteran Pests
Flubendiamide 20% WG is registered across major commercial staples, cash crops, pulses, and vegetables facing heavy borer attacks.
It is effective against caterpillars that have developed resistance to organophosphates and conventional synthetic pyrethroids.
- Paddy (Rice): Yellow stem borer (Scirpophaga incertulas) and leaf folder (Cnaphalocrocis medinalis)
- Cotton: American bollworm (Helicoverpa armigera), spotted bollworm, and pink bollworm
- Pigeon Pea & Gram: Pod borer complex (Helicoverpa and Maruca vitrata)
- Vegetables (Tomato, Brinjal, Cabbage): Fruit borer, shoot and fruit borer, and diamondback moth (DBM)
Application Guidelines and Resistance Stewardship
Apply Flubendiamide 20% WG at the first appearance of young larvae or egg hatching to prevent caterpillars from boring into fruit or stems.
To delay resistance development, rotate diamide applications with alternative modes of action such as spinosyns or oxadiazines.
- Dilution Rate: Apply according to CIBRC label directions using 150 to 200 liters of water per acre
- Nozzle Selection: Use hollow-cone nozzles for fine droplet penetration into dense foliage and apical flower clusters
- Safety Profile: Exceptional environmental safety profile with minimal toxicity to honeybees and predatory natural enemies
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is the technical chemical in Fame insecticide?
Fame contains flubendiamide 20% WG, a phthalic acid diamide ryanodine receptor activator.
How fast does flubendiamide stop caterpillar feeding?
Caterpillars stop feeding within 15 to 30 minutes of ingesting treated plant tissue, preventing economic crop injury immediately.
Is flubendiamide effective against rice leaf folder and stem borer?
Yes, flubendiamide provides long-lasting control of both yellow stem borer and leaf folder in paddy crops.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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