A Different Approach to Plant Protection
Most conventional fungicides and insecticides work by killing on contact or through systemic chemical activity. Arber's biological concentrates work differently. They introduce and amplify naturally occurring microorganisms that compete with pathogens, disrupt insect feeding and reproduction, and actively support plant health rather than simply eliminating threats.
The result is a line of products that can be used across nearly every plant type in the garden, indoors and out, without leaving harmful residues, harming beneficial insects, or creating the resistance cycles that develop with conventional chemistry over time.
All Arber biological concentrates carried at The Mill are OMRI listed, confirming compliance with the standards for use in certified organic production and home organic gardening programs.
Arber Bio Fungicide Concentrate
Arber Organic Bio Fungicide Concentrate is built around a naturally occurring soil bacterium: Bacillus amyloliquefaciens strain F727, delivered in a concentrated formula that includes the cells and their spent fermentation media. When applied to plant surfaces, this organism and its byproducts coat leaves and stems, physically blocking and outcompeting harmful fungal spores before they can germinate and establish.
What it controls:
- Powdery mildew
- Downy mildew
- Botrytis (gray mold)
- Blackspot on roses
- Leaf spot diseases
- Root rot
- Rust
- White and gray mold
Where it can be used: Vegetables, fruits, berries, nuts, flowers, roses, foliage plants, houseplants, ornamental trees, and shrubs, both indoors and outdoors.
Application timing:
- Prevention: apply every 14 days before disease pressure develops
- Treatment: apply once weekly until the issue clears
Beyond disease control, Arber Bio Fungicide stimulates healthy green leaf development, supports root quality and size, and improves overall soil biology through the microbial activity it introduces. It leaves no harmful residues, which means treated fruits and vegetables are safe for same-day consumption after application.
Arber Bio Insecticide Concentrate
Arber Bio Insecticide Concentrate uses heat-killed Burkholderia spp. strain A396 and its spent fermentation media to control foliar-feeding pests and soil-dwelling insects. Unlike contact insecticides that kill on direct application, this biological formulation disrupts pest feeding, reproduction, and soil-phase populations through ongoing biological activity in the plant and root zone.
What it controls:
- Spider mites
- Thrips
- Aphids
- Whiteflies
- Fungus gnats
- Borers
- Beetles
- Soil-dwelling nematodes and other pest populations in the root zone
Where it can be used: Fruits, vegetables, trees, shrubs, flowers, houseplants, and roses, indoors and outdoors.
Application timing:
- Prevention: apply every 10 to 14 days
- Treatment: apply every 7 days until the pest population is cleared
Arber Bio Insecticide is specifically formulated to be harmless to beneficial insects and pollinators. Bees, ladybugs, parasitic wasps, and other beneficial species visiting treated plants are not affected, which makes it compatible with integrated pest management programs where preserving the beneficial insect community is a priority.
Arber Bio Protectant Concentrate
Arber Bio Protectant Concentrate rounds out the disease management side of the Arber lineup with a plant extract-based formula that works differently from the Bio Fungicide. Rather than introducing a beneficial organism, Bio Protectant uses an extract of Reynoutria sachalinensis to stimulate the plant's own natural immune response, boosting its inherent defenses against the pathogens it encounters.
What it controls:
- Root rot
- Leaf spot
- Rust
- Powdery mildew
- Downy mildew
- Blackspot on roses
Additional benefits: Strengthens soil fertility, promotes deeper root development, supports bigger blooms, and produces greener leaves as the plant's own biology is activated and supported.
Used alongside Bio Fungicide, Bio Protectant provides a complementary layer of protection that addresses disease through both external microbial competition and internal plant immunity.
Arber Bio Soil and Root Food
Arber Soil & Root Food completes the Arber system by addressing the foundation that all the above-ground products depend on. This granular concentrate combines Mycorrhizae, Bacillus, and a diverse community of beneficial soil microbes in a shake-on formula that improves root growth, nutrient uptake, and overall soil biodiversity.
A healthy, biologically active root zone makes every other aspect of a plant's performance more resilient, from disease resistance to drought tolerance to nutrient efficiency. Applied at planting or to established plants, it builds the soil environment that supports long-term plant health from the ground up.
How to Apply Arber Concentrates
All Arber biological concentrates are applied in the same general manner. Shake the concentrate thoroughly before each use, as the biological materials can settle. Mix with water according to the label instructions for the specific product and application type. Apply to foliage and soil, covering both the upper and lower leaf surfaces for thorough coverage.
Both the Bio Fungicide and Bio Insecticide can be used indoors and outdoors, making them practical for houseplants, container gardens, and in-ground beds under the same program.
As with any biological product, consistency is important. Biologicals build their effect over time and through repeated applications. Following the preventive application schedule produces better results than waiting for visible problems and applying reactively.
Why Biological Plant Protection Matters
Conventional insecticides and fungicides address problems quickly but carry real costs: disruption of beneficial insect communities, residue concerns on edible plants, soil biology impacts, and the progressive development of resistance in target pest and pathogen populations.
Biological products like those in the Arber lineup address these concerns directly. They work with the natural biological systems already present in the garden rather than overriding them. Over time, a garden managed with biologicals develops a more resilient and self-sustaining plant health ecosystem that requires fewer interventions rather than more.
For gardeners moving toward an organic approach or looking to reduce their reliance on conventional chemistry, Arber's concentrates are among the most versatile and well-documented biological tools available for the home garden.
Find Arber Products at The Mill
The full Arber biological concentrate lineup is available at The Mill, including all four products covered in this guide. Browse the complete Organic Garden collection at themillstores.com or visit any local The Mill store for guidance on which products fit specific plant health challenges and how to build them into an ongoing garden care program.
