Powdery mildew continues to challenge grape growers year after year — reducing yield, affecting fruit quality, and driving up production costs. Research conducted by Dr. Akif Eskalen from the University of California, Davis confirms that Magna-Bon CS 2005, an OMRI-listed low active ingredient (A.I.) copper formulation, delivers strong, consistent control of powdery mildew while reducing overall copper use.
Proven Results Under High Disease Pressure
In replicated field trials at the UC Davis Plant Pathology Fieldhouse, CS 2005 achieved up to 95% disease control, even under high infection pressure.
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83% control at 71% infection rate
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95% control at 46% infection rate
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Applied at 20 oz per 100 gal of water per acre every 14 days
These results confirm that CS 2005 delivers research-proven protection and reliability where it matters most — in the field.
Sustainable, OMRI-Listed Copper Technology
Magna-Bon CS 2005 is OMRI-Listed and approved for use in organic production systems. Its advanced low-copper formulation uses significantly less metallic copper compared to traditional fungicides — reducing environmental impact while maintaining high performance.
Replace Conventional Sulfur Dusting
Growers looking to move away from heavy sulfur applications can confidently reduce or replace conventional sulfur dusting programs with Magna-Bon CS 2005.
CS 2005 provides systemic, reliable protection against powdery mildew — offering a cleaner, more sustainable approach without the drawbacks of sulfur dusting such as worker irritation, equipment wear, or crop residue concerns.
Real-World Performance
Growers continue to see strong results in vineyards across the U.S.:
“Here in North Carolina, I sprayed CS 2005 on three grape varieties known to have copper sensitivity and they performed spectacularly — it eradicated early onset powdery mildew!”
Why Growers Trust CS 2005
🧬 University-Proven Results – Research-backed control under high disease pressure.
🌿 OMRI-Listed for Organic Use – Certified sustainable and approved for organic production.
💧 Low-A.I. Formulation – Uses less copper for a safer, more environmentally responsible approach.
🍇 Proven in the Field – Trusted by growers for reliable, season-long performance.
☀️ Sulfur-Free Advantage – Reduce your reliance on conventional sulfur and gain cleaner, safer protection with CS 2005.
Take Control This Season
Powdery mildew can’t wait — take charge with Magna-Bon CS 2005. Proven performance, sustainable results, and research-driven protection for today’s vineyards.
Backed by research. Trusted by growers. Proven performance.
Take control of powdery mildew with Magna-Bon CS 2005 — the OMRI-Listed, research-proven copper solution that delivers up to 95% control while reducing sulfur use. Contact your Magna-Bon representative today and put sustainable, university-proven protection to work in your vineyard this season.
Click Here to Download the Powdery Mildew Research Trials Information Sheet.
To read Akif Eskalen full report, click here!