Has anyone used this to prevent early or late tomato blight? I lost a huge tomato crop last year and I need to try to prevent it this year.

Yes, George! I have used it the last couple years on my tomatoes and cucumbers and it really works. Start using it early, even before any signs of disease and continue to spray it on every week. Rotate your crop so you aren't planting were you had blight last year, it remains in the soil from year to year. I also plant in black plastic to help separate the plant from the soil. Be sure to spray the lower leaves the most. Good luck!

what ratio water to concentrate?

Low end for preventative and low density pest problems. Higher concentration if severe issue is present. Try to use the lowest concentration that works for YOUR situation. Read entire label carefully. Ask questions with YOUR county extension agent or Dept. of Ag State Inspector for your region. Saftey first.

Does this work on Damping Off root rot for seedlings?

Being that you are talking about the seedling stage of growth, this product won't work. Wait till the soil is warm to plant. If the plants had leaves to absorb the product, then the Bonide would be beneficial to use, but it will take several treatments. Keep in mind that rain or irrigation water will wash the product off the plants requiring retreating.

anyone use this for cedar rust fungal infection on Apple trees? thanks

yes a copper fungicide will work . Always read instructions when preparing product knowing that more is not better

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Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening

Product ID: 792035347

Details

Active Ingredients
Copper Soap)
Brand
Bonide
Item Form
Liquid
Item Weight
1.3 pounds
Liquid Volume
16 fluid

⏳Safe to use up to harvest day

🌿Approved for organic gardening

🧪16 oz concentrated formula

31667CFA

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Description

🌱 Defend your garden like a pro—organic, powerful, and harvest-ready!

ORGANIC SAFE - Certified for organic produce—grow clean, grow confident.
EASY MIX APPLY - Ready-to-mix liquid concentrate for hassle-free garden care.
TRUSTED SINCE 1926 - Bonide’s legacy means reliable, proven plant protection.
VERSATILE APPLICATION - Perfect for fruits, veggies, herbs, ornamentals, and turf.
POWERFUL DISEASE DEFENSE - Controls powdery mildew, black spot, rust & more for a thriving garden.

Bonide Captain Jack Copper Fungicide is a 16 oz concentrated liquid solution designed to control a broad spectrum of plant diseases including powdery mildew, black spot, and peach leaf curl. Approved for organic gardening, it can be safely applied up to the day of harvest on fruits, vegetables, herbs, ornamentals, and turf. Trusted since 1926, this breathable copper-based fungicide offers easy mixing and long-lasting protection to keep your garden healthy and productive.

Specifications

ASIN	B00BSULSHA
Active Ingredients	Copper Octanoate(Copper Soap)
Best Sellers Rank	#1,017 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #70 in Insect & Pest Repellent Sprays
Brand Name	Bonide
Customer Reviews	4.6 4.6 out of 5 stars (10,449)
Global Trade Identification Number	00037321008118
Included Components	Captain Jack's Copper Fungicide, 16 oz
Item Form	Liquid
Item Type Name	OUTDOOR RECREATION PRODUCT
Item Weight	1.3 pounds
Liquid Volume	16 fluid ounces
Manufacturer	Bonide Products LLC
Model Number	811
Part Number	811
Special Features	Breathable
Target Species	Fungus
UPC	798813012425 037321008118 799198412411 742117629797
Unit Count	16 Ounce
Warranty Description	Warranty

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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31667CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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