Active ingredient and biochemical mode of action
- Contains Validamycin 3% Aqueous Liquid (L), classified as an antibiotic fungicide under FRAC Group 26.
- Acts as a potent inhibitor of trehalase, an essential enzyme responsible for breaking down trehalose sugar into glucose in fungal hyphae.
- Deprives growing hyphal tips of energy, causing tip bursting, abnormal branching, and rapid cessation of fungal infection.
- Exhibits systemic acropetal and translaminar movement, protecting rice leaf sheaths and tillers from bottom to top.
Target diseases and approved crop applications
- Paddy (rice): Highly specific and effective against sheath blight (Rhizoctonia solani), preventing stem rotting and lodging.
- Vegetable nurseries: Controls damping-off and collar rot in tomato, brinjal, and chilli seedlings.
- Safe for non-target organisms: Minimal toxicity to honeybees, fish, natural predators, and beneficial soil microbes when used as directed.
Application timing and spraying practices in rice
- Initiate spraying at the early onset of sheath blight lesions on lower leaf sheaths (typically at maximum tillering or panicle initiation).
- Direct spray nozzles toward the base of rice hills where sheath blight lesions initially develop in humid microclimates.
- Follow CIBRC approved label recommendations, wear personal protective equipment, and observe the prescribed pre-harvest interval.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is Validamycin used for in agriculture?
Validamycin is used primarily to control sheath blight (Rhizoctonia solani) in paddy and damping-off in vegetable nurseries.
What is the mode of action of Validamycin?
It inhibits the trehalase enzyme in fungal cells, preventing hyphal elongation and causing infection arrest.
Where should Validamycin spray be directed in rice?
Direct spray toward the lower leaf sheaths near the water line where sheath blight begins.
Is Validamycin an antibiotic fungicide?
Yes, it is an aminoglycoside antibiotic fungicide produced by the soil bacterium Streptomyces hygroscopicus.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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