Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases

Works to kill bugs and it sprays on very well to help remove brown spots on my Laurels. Good value for the money, easy to use, the bottle is a good size.

Background: New England Zone 6a/6b (big snow, ice, and frigid winters), first attempt at growing citrus in container pot. I know, who up here even tries! Gourmet chef (or sad Wannabe) whom cultivates my own herbs for my dishes year-round.Subject: ~ 2’ tall Meyer lemon tree in container pot.Situation: Never used a fungicide before, but total success with Captain Jack’s de-bug product. For those new to the line, I can’t emphasize enough how important it is to read their products’ comprehensive brochures from beginning to end before using. I bought this copper fungicide product to help me combat what I suspect was early powdery mildew on my baby Meyer lemon tree. The tree is my very first citrus, in a container I immediately transpotted with bottom pebbles, Coast of Maine organic worm-casting potting soil, lots of perlite for better drainage and to monitor its roots through the clear plastic. Success! It was thriving all summer outside, and even exploded in new blooms and put out about 15 baby lemons, most of which dropped (because Meyers sacrifice when it senses its young stems can’t support). Then I brought it indoors to winter, still fruiting with three green globes, and placed it under one of my grow lights in a heated low humidity room.What baffled me was, despite my attention to the amount of natural light, temperatures, and minimal water it demanded, it was suddenly showing signs of mildew. To my surprise, the fungicide’s brochure explained how powdery mildew is unique and doesn’t require any water to take hold. It made sense.Remedy: I’ve cared for all of my indoor plants either where they are or in my kitchen sink. But being I’m so fond of this little lemon tree, it’s got thorns to kill, and I mean business, this one wasn’t going to be just a sink job. Armed with the Captain Jack’s fungicide, I first removed and pitched the topmost crust of soil and anything dead or remotely white, then sprayed-turnedover-sprayed the first few inched of soil, lower stems, and lower leaves in the sink. Then when dry, I moved it to the tub, massaged the top two inches of soil with more spray, and retreated the tops and underside of every leaf. I let it air dry. The most egregious white spots reappeared as it dried, but I resisted the temptation to spray it again, knowing the fungicide just takes time to work. I returned it to its place under its grow light (a Soltec canister beam).One week later, the Meyer Lemon’s leaves, while not out-of-the-woods, are showing signs of stability, if not improvement. New buds have emerged at many stem’s ends, and its spikes have grown and hardened, as if to protect its remaining nascent fruit. The fruit is looking good. 🍋Another week later, the tree is looking great, with only a few tiny stubborn (or resistant) patches of powdery mildew (?) remaining. The 3 fruits look great, and all but one of the many new buds are growing. It’s lost no leaves since last week, and definitely thriving. I reapplied the fungicide spray again to the fruit, leaves, and soil. Conclusion, Captain Jack’s Copper Fungicide saved my Meyer Lemon.

Had gray mold on a few of my plants and this has since at minimum lessened the prevalence of the mold. however, the sprayer on the bottle is a thick straight spray that just hits a tiny area, I transfered some to a smaller bottle with a much better spray and was able to actually spray all of the affected plants.

Bonide Captain Jack's Copper Fungicide is a top-notch solution for protecting your plants from a wide range of fungal diseases. This ready-to-use formula is ideal for both organic gardeners and those looking for an effective, environmentally friendly way to manage issues like powdery mildew, downy mildew, blight, and leaf spots.What sets Captain Jack's Copper Fungicide apart is its versatility; it can be used on a variety of plants, including vegetables, fruits, ornamentals, and flowers. The active ingredient, copper octanoate, is a naturally occurring compound that acts as a protective barrier, preventing fungal spores from taking hold on plant surfaces.Gardeners love the ease of application—simply spray it on the affected areas and let it work its magic. The product is rainproof once dry, ensuring lasting protection even in unpredictable weather. Many users have reported seeing a significant reduction in fungal issues after just a few applications, with healthier, more vibrant plants as a result.Bonide Captain Jack's Copper Fungicide is an essential addition to any gardener's toolkit, providing peace of mind and reliable disease control that helps keep plants thriving throughout the growing season.

Fixed all my life’s issues. Literally. Just buy it.

Beware: the 4 windmill palms I sprayed with this died. The 3 palms I didn’t spray are fine.Update: After seeking advice from our palm tree seller, we are convinced the fungus killed our palms. We should have pulled out the dead growth from the center and sprayed the fungicide down inside the top of the palm trunk, not just sprayed the leaves. We now have done this but it’s probably too late. We’ll give II the rest of the summer to see if any of these palms come back to life.

Ran out and needed another shot for my orchids. Works fine.

I had been having a serious problem with rust on my apple trees and had been looking for ANY solution as I watched my dear plants shrivel and die in front of me. The rescue flair went up and Captain Jack responded immediately. After just one or two applications my trees are looking great and all the new leaves are perfectly green and healthy. The product worked perfectly and I feel that the captain is well due for a promotion.