Active Ingredients and Systemic-Contact Synergy
Ridomil Gold pairs Metalaxyl-M (Mefenoxam) with Mancozeb in a wettable powder formulation.
Metalaxyl-M translocates rapidly through plant xylem to arrest fungal RNA polymerase synthesis and cure developing infections, while Mancozeb forms an exterior contact shield preventing new spore penetration.
- Metalaxyl-M (4% WP): High-potency active biological isomer providing curative systemic protection
- Mancozeb (64% WP): Multi-site surface contact protectant preventing external spore germination
- Resistance protection: Multi-site partner shields the single-site phenylamide from resistant pathogen strains
Target Crop Diseases and Application Timing
Ridomil Gold is registered for managing destructive water-mold diseases that cause rapid epidemic crop losses.
Preventive application ahead of humid, rainy weather conditions protects vulnerable crops from sudden foliage collapse.
- Potato and tomato: Early and late blight (Phytophthora infestans) prevention and curative suppression
- Grapes: Controls downy mildew (Plasmopara viticola) on leaves, shoots, and fruit clusters
- Vegetables and mustard: Protects against damping-off, white rust, and downy mildew
Purchasing, Packaging, and Application Best Practices
Commercial packs range from hundred-gram pouches for kitchen gardens to multi-kilogram cartons for commercial farms.
Prepare a smooth slurry in clean water before pouring into the spray tank to achieve uniform wettable powder suspension, observing pre-harvest intervals.
- Pre-slurry mixing: Dissolve powder in a bucket of water before pouring into the primary sprayer tank
- Canopy coverage: Ensure thorough coverage of lower leaves and fruit surfaces
- Personal protection: Wear rubber gloves, protective clothing, and a dust respirator during mixing and spraying
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What chemicals are in Ridomil Gold?
Ridomil Gold contains Metalaxyl-M 4% + Mancozeb 64% WP, providing synergistic systemic and contact protection.
Why is Ridomil Gold effective against potato late blight?
Metalaxyl-M enters plant tissues to halt internal mycelial spread, while Mancozeb protects new outer leaves from incoming fungal spores.
Can Ridomil Gold be mixed with insecticides?
It is compatible with most neutral insecticides, though jar compatibility testing should precede tank combination.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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