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🌱 Defend your garden like a pro—because your plants deserve the best!
Bonide Captain Jack Copper Fungicide is a 16 oz concentrated liquid solution designed for organic gardening. It effectively controls a wide range of fungal diseases such as powdery mildew, black spot, and peach leaf curl on fruits, vegetables, ornamentals, and turf. USDA-approved and safe to use up to the day of harvest, this easy-to-mix fungicide offers long-lasting protection while being eco-friendly and safe for pollinators.






| ASIN | B00BSULSHA |
| Active Ingredients | Copper Octanoate(Copper Soap) |
| Best Sellers Rank | #638 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #36 in Insect & Pest Repellent Sprays |
| Brand Name | Bonide |
| Customer Reviews | 4.6 4.6 out of 5 stars (10,036) |
| 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 | 1.27 Pounds |
| Liquid Volume | 16 Fluid Ounces |
| Manufacturer | Bonide Products LLC |
| Model Number | 811 |
| Part Number | 811 |
| Special Features | Breathable |
| Specification Met | USDA |
| UPC | 798813012425 037321008118 799198412411 742117629797 |
| Unit Count | 16.0 Ounce |
| Warranty Description | Warranty |
M**B
It truly does work
It actually works. Last year sprayed on heavily molded garden and it killed it along with the leaves affected. New growth had no mold. This year I sprayed after the heavy rains but prior to any mold. Also poured some in the ground for the roots to absorb. Wow. EVERYTHING IS NOW IN BLOOM WITHOUT EVEN ONE HINT OF MOLD. My roses, wild flowers, and the flower bushes that usually are solid mold by now...ABSOLUTELY NO MOLD. The area I live in has mold and plant rust rampant in the air. Entire neighborhood gets deeply infested every year. But NOT ANYMORE. You really can't go wrong with this. And it doesn't harm the butterflies or bees and birds. Only drawback is that it is a dark neon blue and will stain hands, clothes, walls, fences, etc. So cover up and be mindful how you spray. Small price to pay for the benefits. Good luck.
S**N
Great product
I used on my deciduous fruit trees after pruning and on 1 Hamlin Orange tree that looks like fungus on branches and leaves! Easy to measure lid was a plus! Orange tree leaves didn't get burned or look bad next day! Brown branches did turn black where i suspected fungus. We will prune in a week and see how well it works on citrus!
J**V
Good product
Good product, fast shipping.
S**N
Effective Fungicide That Controls Plant Disease but Requires Careful Use
This copper fungicide does a good job of controlling plant diseases and keeping my garden healthier. I used it on vegetables and ornamental plants and noticed a clear improvement in preventing issues like leaf spots and blight. The concentrate mixes easily with water and sprays evenly with a standard garden sprayer. That said it does require careful use. If the mixture is applied too heavily or too often it can cause leaf burn or discoloration. Following the directions closely is important to avoid damaging sensitive plants. The bottle could also include a more precise measuring cap to make mixing easier. Overall this is a reliable and effective plant disease control product that works well when used correctly. It is a good organic gardening option but it is not completely foolproof and needs some caution in application.
C**E
A must have for rose garden
The copper fungicide is a must have to rose garden, and fights against fungi disease such as black spots and powdery mildew. It's such a must have in Seattle's rainy weather. I apply every 2 weeks in grow season to my roses. One nit is it's not waterproof and can get washed off. So suggest to alternate it with one that absorbs into the plant & water proof. Alternation also helps with fungi's resistance to sprays
J**E
Easy to use!
⭐⭐⭐⭐⭐ This antifungal concentrate works exactly as intended and does the job well for my houseplants. It’s easy to mix into a solution, clear instructions, and straightforward to use. Simple, effective, and definitely something I’d purchase again.
B**D
Product issue
The product container was half full and the directions on hos to use was torn and couldn't see how to use.
B**Y
Recommend
Just this annually on my own trees to prevent peach leaf curl, works very well
Trustpilot
1 month ago
3 weeks ago