Active Ingredients and Biochemical Mode of Action
Merivon combines two complementary chemical groups with distinct FRAC modes of action, providing powerful disease control and reducing fungal resistance risks.
- Fluxapyroxad (Succinate Dehydrogenase Inhibitor - SDHI): Belongs to FRAC Group 7; halts mitochondrial respiration in complex II of fungal cells, blocking spore germination and mycelial growth.
- Pyraclostrobin (Quinone Outside Inhibitor - QoI): Belongs to FRAC Group 11; inhibits cellular respiration in complex III of the fungal cytochrome pathway, providing long-lasting preventive protection.
- Dual-Action Synergy: Offers translaminar mobility and acropetal movement, shielding both sprayed foliage and newly emerging leaves from fungal penetration.
Target Crops, Major Diseases and Application Timing
Merivon is primarily used in commercial orchards and high-value horticultural plantings where foliar and fruit blemishing pathogens compromise marketable yield.
- Apple: Manages apple scab (Venturia inaequalis), premature leaf fall (Marssonina coronaria), and powdery mildew during pink bud, petal fall, and fruit development stages.
- Vegetables and Berries: Recommended for controlling anthracnose, gummy stem blight, and powdery mildew in cucurbits and solanaceous crops.
- Preventive Application: Highest efficacy is achieved when applied preventively at early disease onset or during disease-favourable humid weather.
- Resistance Management: Rotate Merivon with fungicides of different FRAC mode-of-action groups (such as contact dithiocarbamates or triazoles) to prevent fungal tolerance.
Safety, Environmental Precautions and Label Directions
Operators must adhere strictly to statutory safety protocols and handling guidelines mandated on the registered CIBRC container label.
- Dosage and Water Volume: Mix strictly in accordance with the container leaflet, maintaining thorough and uniform canopy coverage without dripping.
- Pre-Harvest Interval (PHI): Comply with the statutory pre-harvest waiting period between final foliar spray and fruit picking to ensure residues remain below maximum residue limits (MRL).
- Protective Equipment: Wear rubber gloves, eye goggles, and a face mask while measuring, mixing, and spraying.
- Pollinator Safety: Avoid spraying during peak honeybee foraging hours when orchard trees are in full bloom.
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 are the active ingredients in Merivon fungicide?
Merivon contains Fluxapyroxad (SDHI chemistry) and Pyraclostrobin (strobilurin chemistry) formulated as a suspension concentrate (SC).
What diseases does Merivon control in apple orchards?
Merivon effectively controls apple scab (Venturia inaequalis), powdery mildew (Podosphaera leucotricha), and premature leaf fall (Marssonina coronaria).
How does Merivon help manage fungicide resistance?
Because it combines two distinct modes of action (FRAC Group 7 and FRAC Group 11), it prevents single-site resistance from developing quickly, though it should still be rotated with different chemical classes.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More Crop Protection & Pesticides guides
Ask Sakhi AI in your language, check live mandi prices or plan a loan with KisanPe tools.