Collection: Pest & Disease Control

Hydroponic pest and disease control products protect your indoor crop from insects, fungal infection, and root disease at every stage of growth. Whether you're dealing with an active spider mite infestation, battling fungus gnats in your growing medium, or trying to prevent powdery mildew before it takes hold, this collection covers the full range of treatment and prevention solutions — from organic foliar sprays and systemic fungicides to physical barriers and root zone conditioners.

Why pest and disease management matters in hydroponics

Hydroponic systems create ideal conditions for rapid plant growth — but the same warm, humid environment can accelerate pest and disease spread. Without soil biology to buffer problems, a single fungus gnat infestation or bout of root rot can move through a recirculating system quickly. Proactive treatment and early intervention are far more effective than reacting once a crop is under serious pressure.

What's in this collection

• Foliar sprays — organic and pyrethrum-based insecticides for treating spider mites, thrips, aphids, and whitefly directly on plant tissue (including Kendon Pyrethrum Concentrate, MR 24/7, PureCrop1, and Green Cleaner)
• Root zone conditioners and flushes — hydrogen peroxide treatments and enzymatic cleansers to maintain a healthy rhizosphere and prevent root rot (Growth Technology Oxy Plus, CYCO Kleanse, Flairform StopBloc)
• Growing medium treatments — top dressings and soil drenches that disrupt fungus gnat breeding cycles at the source (Gnatnix!, CSS T-Drops, Liquid Science Pure Guard)
• Sticky traps and bug screens — passive monitoring and physical barriers to catch and exclude flying insects (Bugs For Bugs yellow sticky traps, intake bug screens, Outdoor Complete pot traps)
• Disease control — systemic fungicides and broad-spectrum treatments for powdery mildew, root rot, and fungal pathogens (Rid-A-Rot, PureCrop1, Oxy Plus)

How to choose the right treatment

Identify the pest or disease first

Treatment choice depends on the specific problem. Spider mites and thrips respond well to pyrethrum-based or oil-based foliar sprays applied directly to leaf surfaces. Fungus gnats (whose larvae damage roots in growing media) are best controlled with a combination of sticky traps to monitor adult populations and growing medium treatments like Gnatnix! to break the larvae cycle. Root rot and pythium require hydrogen peroxide treatments or enzymatic root cleansers applied to the nutrient solution.

If you're new to hydroponics and not sure what you're dealing with, start with a set of yellow sticky traps — they'll quickly reveal whether you have flying insects and how severe the pressure is.

Prevention vs. active treatment

Preventative products like bug screens on intake fans, root zone conditioners added at low dose throughout the grow cycle, and regular hydrogen peroxide flushes keep problems from establishing. Active infestations require higher-dose foliar treatments applied at the correct interval — most sprays need two to three applications, spaced five to seven days apart, to break pest lifecycles. For organic options, PureCrop1 and Green Cleaner are effective on mites and soft-bodied insects without harsh chemical residues.

Organic and low-residue options

All products in this collection are selected to be safe for use in food-producing grow rooms when used as directed. Organic options — including pyrethrum concentrates, plant-oil-based sprays, and seaweed-derived immune stimulants — are available throughout the range and are particularly suitable for growers who prefer to avoid synthetic chemistry.

A-Grade Hydroponics stocks pest and disease control solutions with Australian stock, fast despatch, and expert advice available by phone or live chat. Browse the full range above or contact our team at our Cheltenham, VIC store for guidance on your specific pest problem.