Arber Organic Insecticide & Fungicide Set Review
My take on the Arber Organic Insecticide & Fungicide Set after using it on indoor potted plants with a small handheld sprayer.
The Arber Organic Insecticide & Fungicide Set is worth buying if you have houseplants with mildew spots, gnats or mites and don’t want to diagnose first. Two 8 oz biological concentrates, each making up to 8 gallons. Half a capful in 16 ounces of water handled my indoor pots. Buy.
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How this review was made: written from my own video review of this product. Every opinion here is my own, from using it myself.
| What’s in the box | 1 Γ 8 fl oz Bio Insecticide, 1 Γ 8 fl oz Bio Fungicide |
|---|---|
| Coverage | Each bottle makes up to 8 gallons at label rate |
| Insecticide targets | Aphids, thrips, spider mites, whiteflies, mealybugs, fungus gnats |
| Fungicide targets | Powdery mildew, botrytis, leaf spot, rust |
| Type | Biological (bacterium based), not synthetic |
| Use | Indoor and outdoor plants; pump, hose-end or battery sprayer |
My Potted Plants Needed a Little TLC
My indoor pots had mildew spots and brown leaves, and I’d been ignoring it. So I picked up the Arber Organic Insecticide & Fungicide Set on Amazon, which is two 8 oz concentrates in one box. One for bugs, one for disease. I got the set, but you can buy the bottles individually, only do that if you’ve already diagnosed which problem you have.
What sold me on the set rather than one bottle: I didn’t actually know which problem I had. Gnats were around. Leaves were spotting. Could’ve been either. Having both means you don’t have to diagnose first, and that’s kind of the whole point of this organic insecticide fungicide combo.
Two Bottles, 16 Gallons of Spray
Each 8 oz bottle yields 16 gallons of finished spray across the set, enough for months of houseplant care. That’s 16 gallons of finished spray across the set, which for a houseplant collection is a long, long time.
I use about a half a capful in 16 ounces of water. Do that math against 8 gallons and you can see why I haven’t come close to running the bottles down. If you’re buying this for a handful of potted plants on a windowsill, these 8 oz sizes aren’t a starter kit you’ll outgrow in a month. They’re the size you buy because the gallon bottles are overkill.
One thing worth knowing before you buy: the price on this one moves around a fair bit. It’s sitting near its usual level right now, but it’s been well under that at points. Worth a quick look at the live price rather than assuming. It’s ranked around #2,554 in Patio, Lawn & Garden with more than 500 bought in the past month, so it’s a steady seller, not a viral one.
Half a Capful, 16 Ounces, Small Sprayer
Half a capful in 16 ounces of water, applied with a small handheld sprayer, clears mildew and gnats on my indoor pots in 3, 5 days. That works for me.
The small sprayer matters more than I expected. I like it because I can control exactly where I’m spraying and where I need the product. Mildew spots on a specific leaf, the underside where mites sit, down into the soil where gnats breed. You’re not fogging a room, you’re hitting targets. I spray the foliage and then work the insecticide down into the potted soil as well too, because fungus gnats don’t live on the leaves.
Both products are biological rather than synthetic. The insecticide is built on a bacterium that disrupts the insect as it grows; the fungicide settles onto the leaf and root surface where disease would start. That’s a slower mechanism than a knockdown chemical, which is worth having in your head before you spray once and expect a clean plant the next morning.
Between the two bottles the coverage list is broad: aphids, thrips, spider mites, whiteflies, mealybugs and fungus gnats on the pest side, then powdery mildew, botrytis, leaf spot and rust on the disease side. The manufacturer label lists plants, grass, flowers and fruits, so you don’t have to buy anything different for the vegetable garden or the fruit trees. Check each label first though. These are two separate EPA-registered products and the rates aren’t identical.
Three weeks in, the mildew spots I’d been ignoring for a month were gone, and the gnat population in my potting soil dropped to nothing after two soil drenchings with the insecticide.
Check today’s price on Amazon βWhere This Organic Insecticide Fungicide Set Isn’t the Right Buy
If you’ve got acres, 8 oz bottles are the wrong size. The instructions mention you can connect the whole bottle to your outdoor hose for outdoor use, and if that’s your situation you’ll burn through a bottle at a pace that makes the bigger sizes the smarter buy.
My actual gripe is the dosing. There’s no measuring cup or dropper in the box, so “half a capful” is me eyeballing the cap on a concentrate bottle, not a measured amount. For indoor pots that’s fine. If you’re the type who wants a precise rate, you’re reading the label and doing your own math with a measuring spoon. It took me a minute to settle on my 16 ounce mix.
And this isn’t an instant fix. Biological products work on their timeline, not yours.
Opening the Box and Mixing the First Batch
No assembly needed, just read the labels and spray. Two bottles, two labels, done. The only thing you need that isn’t in the box is a sprayer, and for indoor plants any small handheld trigger bottle does it.
Read the labels before the first mix. Each one is its own registered product with its own rate, so don’t assume the insecticide and the fungicide dilute identically. That’s the one step people skip.
Would I Buy the Set Again? Yes.
It’s cleared mildew and gnats on every pot I’ve sprayed; buy the set if you’re not sure which pest you’re fighting. The reason I’d buy the set over a single bottle again is the not-having-to-guess part. Bugs and disease show up in the same warm humid stretch, and one product doesn’t treat both.
For a collection of indoor potted plants plus some patio stuff, 16 gallons of finished spray from two small bottles is a lot of plant care for one box. If you’re spraying a yard, size up. If you’re spraying a windowsill, this is the one, and you can see current pricing on Amazon.
Frequently Asked Questions
Is it safe to use around kids and pets?
Both bottles are biological rather than synthetic, built on naturally occurring bacteria, and the product is described as safe for kids, pets and the environment. Still read each label for re-entry timing before anyone touches a freshly sprayed plant.
Can I use it on edible plants like vegetables and fruit trees?
Yes. The labels cover plants, grass, flowers and fruits, so vegetables, roses and shrubs are in scope for both bottles. Check each label for the specific crop and rate before you spray something you’re going to eat.
How long does mixed spray last once diluted?
Mix what you’ll use. I keep batches small at 16 ounces for that reason rather than making a gallon and letting it sit. Biological products are living organisms, so a jug of diluted spray parked in a hot garage isn’t the same product a week later.
Do I need both bottles, or can I just buy one?
Buy the single bottle if you’ve already diagnosed the problem, powdery mildew gets the fungicide, gnats get the insecticide. Buy the set if you’re looking at spotted, browning leaves with gnats hovering nearby and genuinely can’t tell which problem is driving it.
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