Proven Fire Blight Control for Apple Growers
Backed by Cornell University Research
Fire Blight remains one of the most destructive bacterial diseases in apples and other pome fruit — capable of wiping out an orchard’s yield and long-term productivity in a single season.
Magna‑Bon CS 2005 is an OMRI‑listed copper sulfate pentahydrate in‑solution formula designed to deliver maximum protection for your crops.
Research trials conducted at Cornell AgriTech in Geneva, NY to evaluate the effectiveness of bactericide programs for managing blossom blight and shoot blight in apples. The trial was performed in an orchard of 18-year-old ‘Idared’ trees grafted on B.9 rootstocks. Treatments were applied with a gas-powered backpack sprayer, calibrated to deliver 100 gallons per acre (0.5 gallon per tree), at the following application timings:
| Timing | Growth Stage | Date |
|---|---|---|
| Start | Silver Tip | April 10 |
| Application 1 | Tight Cluster | April 24 |
| Application 2 | Full Pink | April 27 |
| Application 3 | 20% Bloom | May 2 |
| Application 4 | 40% Bloom | May 4 |
| Application 5 | 80% Bloom | May 6 |
| Application 6 | Full Bloom / Early Petal Fall | May 8 |
| Application 7 | Full Petal Fall / Early Terminal Shoot Growth | May 11 |
| Application 8 | Active Terminal Shoot Growth | May 17 |
Magna-Bon CS 2005 was included in two separate evaluations including:
Incidence of Blossom Bight – 75% Control
- CS 2005 had 83% control with the following protocol:
- Silver Tip: 48 ounces of CS 2005
- Applications 3 – 8: 16 ounces of CS 2005
- CS 2005 mixed with Firewall and Regulaid had 100% control with the following protocol:
- Silver Tip: 48 oz CS 2005
- Applications 3, 5 and 7: 8 oz of CS 2005 + FireWall 17 (24 oz) + Regulaid 48 fl oz
- (4) Applications: Start at Silver Tip, 20% Bloom, 80% Bloom and Full Petal Fall/Early Terminal Shoot Growth
Incidence of Shoot Blight – 60% Control
- CS 2005 had 83% control with the following protocol:
- Silver Tip: 48 ounces of CS 2005
- Applications 3 – 8: 16 ounces of CS 2005
- CS 2005 mixed with Firewall and Regulaid had 100% control with the following protocol:
- Silver Tip: 48 oz CS 2005
- Applications 3, 5 and 7: 8 oz of CS 2005 + FireWall 17 (24 oz) + Regulaid 48 fl oz
- (4) Applications: Start at Silver Tip, 20% Bloom, 80% Bloom and Full Petal Fall/Early Terminal Shoot Growth
Click here to download the Fire Blight Information Sheet.
Why Apple Farmers Are Turning to Magna-Bon CS 2005
🌱 OMRI‑Listed for organic production — Premium, sustainable market flexibility.
⚡ Reduced risk of phytotoxicity — Protects sensitive trees and younger plantings.
🧪 University-led research proves efficacy — Independent validation for growers.
⏰ Flexible application timing — Covers bloom through active growth stages.
🌎 Environmentally responsible & grower-friendly — Supports sustainable production.
Research Backed. Field Tested. Grower Approved.
Grower Success: Make the Switch
Join the growing number of apple producers making the switch to Magna‑Bon CS 2005. With university‑backed performance and a strong field track record, it’s a smarter solution for managing fire blight effectively and sustainably.
👉 Ready to protect your orchard with confidence? Contact your Magna‑Bon regional rep today and we’ll help you develop a tailored spray program for your orchard’s bloom through shoot‑growth window.