Crop ProtectionBy Dr. Ramesh Patel, Chief Agronomist
Copper Sulphate Pentahydrate Crystals for Agriculture: Downy Mildew Control, Bordeaux Mixing & Root Nutrition
Published on 2026-09-1212 mins readFCO 1985 & ISO 9001:2015 Verified
Executive Summary & Key Takeaways
A comprehensive chemical analysis of agricultural Copper Sulphate Pentahydrate 24%. Explore crystal grading, fungal mycelium suppression, and foliar spray safety.
Table of Contents (Jump to Section)
In modern crop protection and commercial horticulture, Copper Sulphate Pentahydrate crystals for agriculture serve as both an essential micronutrient and a potent, broad-spectrum anti-microbial agent. From the vineyards of Nashik to apple orchards in Jammu & Kashmir and rubber plantations in Kerala, high-purity copper crystals are the foundation of integrated pest and disease management.
1. Physical Specifications & Active Assay
Copper Sulphate Pentahydrate (CuSO4 · 5H2O) produced by Auron is synthesized from high-purity copper scrap and virgin sulfuric acid:| Technical Parameter | Agricultural Grade Standard | Auron Certified Analysis |
|---|---|---|
| Elemental Copper (as Cu) | 24.0% minimum | 24.5% – 25.1% |
| Iron (as Fe) Impurity | 0.1% maximum | < 0.04% |
| Lead (as Pb) Impurity | 30 ppm maximum | < 12 ppm |
| Water Insoluble Matter | 0.2% maximum | < 0.05% |
| Crystal Form | Medium Diamond Crystals (2–5 mm) / Fine Powder | Uniform Deep Blue Crystals |
2. Multi-Site Fungicidal Mode of Action
Unlike synthetic single-site organic fungicides, copper ions (Cu2+) act via non-specific multi-site enzyme denaturation:- •Spore Membrane Disruption: Cu2+ binds to sulfhydryl groups in fungal enzymes, halting cellular respiration.
- •Zero Resistance Development: Fungi like *Plasmopara viticola* (Downy Mildew) and *Phytophthora infestans* (Late Blight) have developed zero genetic resistance to copper over 140 years of agricultural use.
3. Application Guidelines in Orchards & Vineyards
- •Dormant Season Wash: 1.5% Bordeaux mixture (1.5 kg Copper Sulphate + 1.5 kg Quicklime in 100 L water) applied immediately after pruning to sterilize cut surfaces.
- •Foliar Nutrition: 1 to 2 grams per liter in orchards suffering from copper deficiency exanthema (dieback of twigs).
Direct Manufacturer SourcingAuron Fertilizers · Ahmedabad, Gujarat
Procure High-Purity Micronutrients Directly from our Factory Desk
Eliminate middleman trader markups. Save 5–8% on bulk truckloads and 20ft FCL export containers with guaranteed AAS assay reports and anti-caking moisture packaging.