Active Ingredient Chemistry and Dual Mode of Action
Folio Gold combines systemic vascular movement with an external protective shield on plant foliage.
Key biochemical attributes:
- Metalaxyl-M (3.75%): Systemic phenylamide that inhibits RNA polymerase I, halting fungal ribosomal RNA synthesis and internal mycelial growth.
- Chlorothalonil (500 g/L): Multi-site contact protectant that inactivates vital fungal cell enzymes, preventing spore germination on leaf surfaces.
- Acropetal systemic movement: Metalaxyl-M is absorbed through leaves and translocated upward to protect rapidly expanding new foliage.
- Durable rainfastness: The liquid SC formulation sticks securely to waxy plant leaves, resisting wash-off during heavy monsoon downpours.
Target Crops and Oomycete Disease Spectrum
Folio Gold is registered under CIBRC guidelines across key commercial vegetables and horticulture crops.
Major registered crop uses:
- Potato and Tomato: Controls late blight (Phytophthora infestans), preventing foliar blighting and destructive tuber decay.
- Grapes: Provides exceptional protection against downy mildew (Plasmopara viticola) on leaves, inflorescences, and young berries.
- Cucurbits (Cucumber, Melons): Manages downy mildew (Pseudoperonospora cubensis), preserving photosynthetic green canopies.
- Onion: Controls downy mildew and purple blotch during cool, humid growth windows.
Application Guidelines and Resistance Management
Applying Folio Gold before widespread disease sporulation occurs ensures maximum crop protection.
Application best practices:
- Preventive application: Apply at the earliest onset of cool, humid weather favorable to blight and downy mildew outbreaks.
- Fungicide rotation: Alternate with fungicides from different chemical groups (such as dimethomorph or copper compounds) to prevent resistance.
- Label dose compliance: Measure accurately according to official manufacturer package directions; mix thoroughly in clean water.
- Operator safety: Wear personal protective equipment including chemical-resistant gloves, goggles, and a protective mask during mixing.
Official source
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Directorate of Plant Protection, Quarantine & Storage ↗Related on KisanPe
Common questions
What active ingredients are present in Folio Gold fungicide?
Folio Gold contains Metalaxyl-M 3.75% (systemic phenylamide) + Chlorothalonil 500 g/L (contact protectant) in a suspension concentrate (SC).
Which major diseases are controlled by Folio Gold in vegetables?
It provides outstanding control against late blight in potatoes and tomatoes, and downy mildew in grapes and cucurbit crops.
Why is the combination of metalaxyl-M and chlorothalonil effective?
It combines systemic internal curative action with a multi-site surface barrier that protects new growth and delays fungicide resistance.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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