Active chemical nature and mode of fungicidal action
Validamycin 3% L (liquid) is an aminoglycoside antibiotic fungicide that functions primarily through contact and translaminar action.
It works by specifically inhibiting trehalase, an enzyme vital for the digestion of trehalose and carbon transport in the fungal pathogen. Deprived of essential carbohydrates, the advancing hyphal tips of Rhizoctonia solani stop elongating, swell abnormally, and collapse before penetrating host leaf sheaths.
- Active chemical: Validamycin 3% L.
- Biochemical mechanism: Trehalase enzyme inhibitor disrupting fungal carbohydrate metabolism.
- Hyphal tip arrest: Stops hyphal elongation and infection cushion formation on rice sheaths.
- Eco-friendly profile: Non-toxic to non-target organisms, earthworms, fish, and beneficial predatory spiders in rice ecosystems.
Target crops and approved fungal diseases
Validamycin is registered in India primarily for sheath blight control in paddy fields and damping-off management in vegetables.
It is celebrated for providing reliable disease containment under dense crop canopies without leaving harmful residues.
- Paddy (Rice): Sheath blight (Rhizoctonia solani) affecting lower leaf sheaths and progressing toward flag leaves.
- Vegetables (Tomato, Chilli, Cabbage): Damping-off and collar rot caused by Rhizoctonia in nursery beds.
- Soybean & Pulses: Web blight and aerial Rhizoctonia blight suppression.
Application timing, spray techniques, and safety
In paddy cultivation, apply Validamycin at the initial appearance of sheath blight lesions on lower sheaths (typically at maximum tillering or panicle initiation).
Direct the spray nozzle toward the lower base of rice stems where fungal infection cushions develop, using clean water at container label recommended rates.
- Targeted spray placement: Direct spray nozzles into the lower canopy rather than spraying only the upper flag leaves.
- Water volume: Use adequate spray volume (500 liters per hectare) for complete wetting of dense lower tillers.
- Protective measures: Wear protective gloves, clean work clothes, and face mask; observe designated pre-harvest intervals.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
ICAR - National Rice Research Institute ↗Related on KisanPe
Common questions
What type of agricultural fungicide is Validamycin?
Validamycin is an antibiotic fermentation fungicide derived from the beneficial soil bacterium Streptomyces hygroscopicus.
Which major disease does Validamycin 3% L control in rice?
It specifically controls sheath blight (Rhizoctonia solani), one of the most destructive fungal diseases in paddy cultivation.
Where should the spray be directed when applying Validamycin in paddy?
The spray should be directed toward the lower base of rice hills and lower leaf sheaths where the fungal mycelium develops.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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