Active Molecule and Systemic Mode of Action
Carbendazim, the active component of Bavistin, is a broad-spectrum methyl benzimidazole carbamate (MBC) fungicide.
- Active Ingredient: Carbendazim 50% WP, classified under FRAC Group 1 (beta-tubulin assembly inhibitors in fungal mitosis).
- Biochemical Mechanism: Binds specifically to fungal beta-tubulin subunits, disrupting microtubule assembly during nuclear cell division and halting fungal hyphal growth and spore germination.
- Acropetal Vascular Mobility: Absorbed rapidly through roots and green foliage, translocating upward via the plant's xylem vessels to protect emerging shoots and leaves.
- Curative and Preventive Action: Eradicates established internal mycelial infections while leaving a protective chemical barrier against new spore infections.
Target Crops and Controlled Disease Spectrum
Bavistin is officially approved across major agricultural and horticultural cropping systems.
- Paddy: Controls blast (Pyricularia oryzae) and sheath blight (Rhizoctonia solani) during tillering and panicle emergence.
- Groundnut and Pulses: Controls tikka disease (Cercospora leaf spot), collar rot, and dry root rot.
- Grapes and Apples: Manages anthracnose, powdery mildew, and apple scab.
- Vegetables (Chili, Tomato, Brinjal): Controls damping-off in nurseries, early blight, and fruit rot (anthracnose).
- Seed Treatment Application: Applied as a dry seed dressing or wet slurry (at 2 grams per kg seed) to eliminate seed-borne fungal pathogens before sowing.
Label Directions, Spray Safety and Resistance Management
Because Carbendazim is a single-site inhibitor, resistance management protocols must be observed.
- Resistance Management: Avoid repeated continuous applications of Carbendazim alone; alternate or tank-mix with multi-site contact protectants like Mancozeb or Copper Oxychloride.
- Preparation of Spray Slurry: Mix the wettable powder into a smooth paste with a small volume of water before diluting into the full spray tank.
- Pre-Harvest Interval (PHI): Observe the statutory waiting period between the last chemical application and crop harvesting as printed on the package leaflet.
- Personal Protective Equipment: Wear rubber gloves, eye goggles, and a face mask during measuring and spraying.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the active ingredient in Bavistin fungicide?
Bavistin contains Carbendazim 50% WP, a systemic benzimidazole fungicide that inhibits fungal cell division.
How is Bavistin used for agricultural seed treatment?
Bavistin is mixed as a dry dressing or wet slurry at approximately 2 grams per kilogram of seed to protect germinating seedlings from seed-borne and soil-borne fungal pathogens.
Why should Bavistin be alternated with contact fungicides like Mancozeb?
Because Carbendazim acts on a single biochemical site (beta-tubulin), alternating with multi-site contact fungicides prevents fungal strains from developing resistance.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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