Dimethomorph + Mancozeb Wettable Powder (WP) is a broad-spectrum fungicidal combination formulated as a wettable powder, designed to control oomycete and foliar fungal diseases in a wide range of crops.
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Dimethomorph (FRAC Group 40)
A systemic/locally systemic fungicide effective against oomycete fungi (e.g., Phytophthora, Plasmopara, Pythium).
It disrupts fungal cell wall synthesis and inhibits pathogen growth and penetration. -
Mancozeb (FRAC Group M:03)
A multi-site, contact-protectant fungicide that prevents fungal infection on the leaf surface by interfering with multiple metabolic pathways.
Provides broad-spectrum protection and resistance-management support.
When combined in WP form, the two actives offer:
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Preventive + anti-sporulation activity
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Broad-spectrum protection against multiple fungal families
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Resistance management due to dual modes of action
2. 🔬 KEY PROPERTIES
Formulation Properties (WP)
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Powder form that disperses in water to form a stable sprayable suspension
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No organic solvents
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Good adherence to foliage
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High stability during storage
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Easily measured and mixed
Active Ingredient Properties
Dimethomorph
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Type: Systemic/locally systemic fungicide
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FRAC Group: 40
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Mode of Action: Inhibition of cell wall (cellulose) biosynthesis
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Targets: Phytophthora, downy mildew, damping-off pathogens
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Behavior:
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Translaminar movement
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Anti-sporulation
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Inhibits mycelial growth
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Mancozeb
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Type: Contact, protectant fungicide
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FRAC Group: M:03
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Mode of Action: Multi-site inhibition of fungal enzyme activity
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Targets: Wide range of foliar fungal pathogens
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Benefits:
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Resistance suppression
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Broad protective barrier on leaf surfaces
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3. 🌱 APPLICATION AREAS (General / Non-instructional)
This combination is widely used for fungal disease management in:
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Vegetables
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Potatoes
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Tomatoes
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Cucurbits (melons, cucumbers, squash)
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Grapes
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Onions
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Tobacco
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Brassicas
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Ornamental crops
The Dimethomorph + Mancozeb blend is particularly valued for use in high humidity or rainfall-prone areas, where foliar diseases thrive.
4. 🌾 USES (Target Diseases)
This WP fungicide combination typically provides protection against:
Oomycete Pathogens (Dimethomorph-driven)
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Downy mildew (e.g., Plasmopara viticola in grapes, Pseudoperonospora cubensis in cucurbits)
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Late blight (Phytophthora infestans in potato & tomato)
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Root and crown rots (Phytophthora spp.)
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Damping-off (Pythium spp.)
Broad-Spectrum Surface Protection (Mancozeb-driven)
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Leaf spot diseases
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Anthracnose
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Early and late blight support
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General fungal infections on foliage
The combination protects both the inside of tissues (dimethomorph) and the surface (mancozeb), making it effective in integrated disease management.
5. 🌿 EXAMPLE CROP-SPECIFIC BENEFITS (General Overview)
🍇 Grapes
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Strong protection against downy mildew
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Prevents new infections and reduces sporulation
🥔 Potatoes
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Controls late blight in cool, moist conditions
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Reduces tuber infection potential
🍅 Tomatoes
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Protection from Phytophthora infestans
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Suitable for greenhouse and field tomatoes
🥒 Cucurbits (cucumber, melon, squash)
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Effective against downy mildew
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Helps maintain leaf health during humid periods
🌼 Ornamentals
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Broad protective barrier for foliage
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Useful for nurseries and greenhouse production
