Copper hydroxide 77% WP
Classification:
Fungicide
Formulation:
Copper hydroxide 77% WP (Wettable Powder)
CAS NO:
20427-59-2
USAGE:
Protective contact fungicide for controlling fungal and bacterial diseases in
fruits, vegetables, field crops, and ornamentals. Effective against downy
mildews, leaf spots, blights (early/late), anthracnose, and bacterial diseases
like citrus canker and fire blight.
Pack size:
500g, 1kg, 5kg, 25kg/bag, or as required
Direction for Use
| Crop | Target Diseases | Dosage (77% WP) | Application Timing | Remarks |
|---|---|---|---|---|
| Grapes | Downy mildew, Black rot | 2.5-3.5 kg/ha | Pre-bloom to harvest (7-10 day intervals) | 1) REI: 48 hrs 2) Max 8 applications/year |
| Tomatoes | Early blight, Bacterial spot | 2.0-3.0 kg/ha | First signs of disease | PHI: 3 days |
| Citrus | Canker, Melanose | 3.0-4.0 kg/ha | Post-fruit set to color break | Do not mix with acidic products |
| Potatoes | Late blight | 2.5-3.5 kg/ha | Preventive before disease onset | Combine with systemic fungicides |
| Apples | Fire blight, Scab | 3.0-4.0 kg/ha | Green tip through petal fall | Apply at 50-100 gal water/acre |
Product Details
Mode of Action:
-Multi-site contact activity
-Copper ions disrupt enzyme systems in pathogens
-Prevents spore germination and mycelial growth
-Forms protective barrier on plant surfaces
Benefits:
-Broad-spectrum disease control
-Low risk of resistance development
-Compatible with most pesticides (check compatibility first)
-Improves plant vigor and fruit quality
Precautions:
-PPE: Gloves, goggles, respirator (dust mask)
-Do not apply during flowering (bee hazard)
-Maintain 14-day interval between applications
-Storage: Keep in dry place below 30°C
Environmental Hazards:
-Toxic to aquatic invertebrates
-Avoid runoff to water bodies
-Moderate persistence in soil (half-life 30-90 days)
-Copper accumulation possible in long-term use