Proven Fire Blight Control for Apple Growers
Backed by Cornell University Research
Apple growers know the devastating impact fire blight can have on yield, tree health, and long-term orchard productivity. In a research trial conducted by Cornell University,
Magna-Bon CS 2005 demonstrated superior fire blight suppression when paired with Firewall and Regulaid – providing a more effective, lower risk solution for your orchard.
Why Apple Farmers Are Turning to Magna-Bon CS 2005
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OMRI-Listed for organic production
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Reduced risk of phytotoxicity vs. conventional copper
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Proven efficacy in independent, university-led research
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Flexible application timing during bloom and growing season
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Environmentally responsible and grower-friendly
Evaluation of Bactericide Programs for the Management of Fire Blight on ‘Idared’ Apples in New York, 2021.
A research trial was conducted at Cornell AgriTech in Geneva, NY to evaluate the effectiveness of bactericide programs for the management of blossom blight and shoot blight on apple. The orchard site is a planting of 18-yr-old ‘Idared’ trees on B.9 rootstocks. Treatments were applied using a gas-powered backpack sprayer calibrated to deliver 100 gal/A (0.5 gal/tree) at the following timings:
- 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 (Table 1)
1. With a 75% infection rate of Blossom Blight, CS 2005 had 83% control with the following protocol:
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- Silver Tip: 48 ounces of CS 2005
- Applications 3 through 8: 16 ounces of CS 2005
2. With a 75% infection rate of Blossom Blight, CS 2005 mixed with Firewall and Regulaid had 100% control with the following protocol:
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- 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 (Table 2)
1.With a 60% infection rate of Shoot Blight, CS 2005 had 83% control with the following protocol:
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- Silver Tip: 48 ounces of CS 2005
- Applications 3 through 8: 16 ounces of CS 2005
2. With a 60% infection rate of Shoot Blight, CS 2005 mixed with Firewall and Regulaid had 100% control with the following protocol:
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- 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.
How Magna-Bon CS 2005 Works
Magna-Bon CS 2005 is an OMRI-listed copper sulfate pentahydrate in-solution formula designed to deliver maximum antimicrobial activity with minimal risk of crop injury. It binds quickly and stays active longer, protecting your trees when they’re most vulnerable.
✅ Labeled for use on apples
✅ Compatible with IPM programs
✅ Effective against multiple pathogens beyond fire blight
Trusted by Growers. Proven by Research.
Join the growing number of apple producers making the switch to Magna-Bon CS 2005. With university-backed performance and a track record of success in the field, it’s a smarter solution for managing fire blight effectively.
