Arber Organic Bio Fungicide 8 oz

Arber Organic Bio Fungicide 8 oz

By Arber
$20
Size
8 oz16 oz

Live bacteria, standing guard.
Start early and keep the rhythm.

How often?

  • Free ground shippingWhen lights, pots and Arber come to $75
  • Works with our bugsEach Arber page gives the wait before a release
  • Made by ArberPlant care made from biology

01 · What it's for

A guard for leaves, made of bacteria.

Powdery mildew, botrytis, black spot, leaf spots and rust start as spores that land and sprout. These bacteria get there first and keep the spores from sprouting. Start early and keep it up.

Check before you order

  • It prevents and slows disease. Leaves already marked stay marked; judge it by the new ones.
  • Start before disease shows, or at the first spot, and keep the rhythm.
  • Downy mildew, late blight and fire blight are on the label as slowed down, not stopped.
  • Our beneficials can go out once the spray has dried.
At a glance
Active
Bacillus amyloliquefaciens (strain F727), 96.4%, at least 1 billion live cells per mL
Size
8 oz concentrate, makes 8 gallons of spray
Mix
2 Tbsp (1 fl oz) per gallon of water
How often
Every 7–10 days
Indoors
Yes, and outdoors, up to the day of harvest
Registration
EPA Reg. No. 84059-28-97021
Bio Fungicide

02 · With our beneficials

Fine alongside
our beneficials.

It doesn't go after insects or mites, so the only wait is for the spray to dry. Release on the same day if you like.

Once the spray has driedthen release any of our beneficials

From our spray timing table, the same one Toby uses. Asking about a different spray? Ask Toby in the chat.

03 · Works with

Goes well with

Mix it inSpray BottleView →Measure itMeasuring CupView →Pairs withBio InsecticideView →Release once drySpecial BlendView →

04 · Set it up

Getting ahead of it

  1. Start early

    Start early

    Spray before the season that usually brings trouble, or at the very first spot. Bacteria need time to settle in.

  2. Mix fresh

    Mix fresh

    2 tablespoons per gallon of water. These are live cells; mix what you'll use today.

  3. Cover every leaf

    Cover every leaf

    Tops and undersides, until they're wet. Bare patches are open doors.

  4. Keep the rhythm

    Keep the rhythm

    Every 7–10 days. New leaves grow in unguarded, so each spray covers the new ones.

05 · Field notes

First to the leaf
wins.

Bacteria hold the ground

How it works

Bacteria hold the ground

Disease spores need a quiet patch of leaf to sprout. These bacteria spread across the surface and release compounds that stop spores sprouting, a bit like a lawn too thick for weeds.

Prevention beats rescue

Good practice

Prevention beats rescue

A fungus inside a leaf is out of reach of anything sprayed on top. That's why every fungicide of this kind works best early: protect what's clean and let the new growth come in that way.

Airflow does half the job

Good practice

Airflow does half the job

Mildew and botrytis love still, damp air. A small fan, space between pots and watering the soil instead of the leaves make every spray go further.

The maker

Arber

Plant care made
from biology.

Arber builds its range from living things: bacteria that guard leaves, a plant extract that wakes up a plant's own defenses, and nutrients from produce that would otherwise have been thrown away. Its sprays use the same kinds of actives commercial growers rely on, registered with the EPA.

We carry it because its sprays can share a plant with our bugs when the timing is right, and every Arber page here gives you that timing.

Bacteria
that guard leaves
Plant extracts
that switch on defenses
Upcycled produce
turned into plant food
Bio InsecticideBio InsecticideInsecticide for Roses & FlowersInsecticide for Tomatoes & Vegetables

Shop all Arber →

Before you order

Your questions, answered

Something else? Ask Toby in the chat, bottom right.

Will it fix leaves that already have mildew?

No. Marked leaves stay marked. It keeps the disease from spreading to clean leaves and new growth, so pinch off the worst leaves and protect the rest.

Can I use it with beneficial insects?

Yes. Release them once the spray has dried. It's bacteria that fight fungi; it doesn't go after insects or mites.

Can I use it on houseplants?

Yes, indoors and out. Indoors, pair it with good airflow; mildew loves still, damp air.

8 oz or 16 oz?

Same liquid. 8 oz makes 8 gallons of spray at the label rate; 16 oz makes 16, which suits a garden on a weekly rhythm.

How should I store it?

Cool and dry, and don't let it freeze. The bacteria are alive.

What does it smell like?

Earthy, like damp soil, and strongest in the bottle. It's live bacteria, so there's no perfume added to hide it.

The mistake most people make

Waiting for the leaves to look bad. It guards clean leaves; it can't clean marked ones. Start when the weather turns damp, or at the first spot.

More about Bio Fungicide

Arber Bio Fungicide is a bottle of live, helpful bacteria. Sprayed on leaves, they settle across the surface and make compounds that stop disease spores from sprouting, so the disease never gets a foothold.

That makes it a guard rather than a cure. It does its best work before a disease shows up or at the first spot, on powdery mildew, botrytis, black spot, leaf spots and rust. It's fine with our beneficials: release them once it dries.

Ready when you are

Bio Fungicide

Live bacteria, standing guard. Start early and keep the rhythm.

More help

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