How to treat and control plant disease organically

There are many fungal diseases that attack plants and cause foliage drop, distorted growth and, if left untreated, plant death. Eco Organic Garden shares some tips on how you can help improve the health of your plants.

Remember to fertilise

Poorly fed and stressed plants are often more vulnerable to disease, so keep your garden well fertilised. Manures and organic pellets are good options. Plus, regular doses of Eco Organic Garden’s eco-seaweed will reduce stress levels and help boost your plant’s defences.

Spray to curb fungal disease

Use Eco Organic Garden's eco-fungicide as a safe spray to get on top of many common diseases. These include:

  • Black spot. Appears as large, irregular black spots in leaves. It usually strikes in warm, humid conditions and as the disease progresses, leaves yellow and drop.
  • Powdery mildew. Produces a white or light grey coating over foliage and stems. It distorts young growth, while older foliage may pale or turn yellow.  There is a black and yellow ladybeetle that eats powdery mildew but it doesn’t eat enough to control the powdery mildew without the help of a spray.
  • Rust. Appears as rusty brown pustules on the underside of leaves and usually with yellow or pale spots on the leaf surface above. If untreated the leaves drop and plants end up badly defoliated.

Eco-fungicide works by attacking fungal growth on contact and then leaving a protective coating over foliage to stop the disease spreading.

Make a super brew

For even better results in treating fungal problems, you can make your own super brew.  Make up some of Eco Organic Garden’s eco-fungicide and then add to the solution eco-oil at a rate of 2ml per litre of water. This helps the spray adhere to foliage better and improves results. To boost plant health, you can also add Eco Organic Garden’s eco-seaweed. It’s very high in potassium (16 percent), which is known to help plants fight fungal diseases. By spraying directly onto the foliage you’re putting the potassium right where it’s needed—at the infection site.

Fix the sap-suckers

Another common fungal problem is sooty mould, which develops as a black or dark grey coating on plant leaves and stems. It appears when sap-sucking pests, such as aphids and scale, attack plants and give off a sugary waste called honeydew. The honeydew sticks to leaves and stems and acts as a food source for the fungal disease. To control sooty mould first get rid of any sap-sucking insects with Eco Organic Garden’s eco-oil or eco-neem. Spray at least twice to break the pest cycle and the sooty mould problem will then fade away.

Get your garden under control

View the full Eco Organic Garden range available at your local Bunnings.

How to control and eliminate garden pests organically

Planting & Growing How to control and eliminate garden pests organically Try controlling garden pests with these approaches from Eco Organic Garden.

How to control weed organically

Planting & Growing How to control weeds organically There are plenty of organic ways to keep weeds at bay without the need for nasty chemicals. Here are some top tips from Eco Organic Garden.

How to improve soil organically

Planting & Growing How to improve soil organically The key to a thriving garden is to have rich, healthy soil that in turn supports strong plant growth, improved flowering and bigger harvests in the vegie patch. Here’s some advice on how to fix the most common soil problems from Eco Organic Garden.

How to treat and control plant disease organically

Planting & Growing How to treat and control plant disease organically Eco Organic Garden shares some tips on how you can help improve the health of your plants.

Six plants that repel mosquitoes and flies

Planting & Growing Six plants that repel mosquitoes and flies Using plants is a natural and effective way to repel mosquitoes, flies and other insects from entering your home. Here’s a list of the six best insect-repelling plants.

Person planting spinach 03:11

Planting & Growing How to grow vegetables Watch our step-by-step guide and find out everything you need to know about how to grow fresh vegetables in your garden.


Planting & Growing How to create a low-allergy garden If you suffer from hay fever or other allergies, then being out in the garden can, at times, be less than enjoyable. But there are some steps you can take to create an allergy-friendly garden so you can spend more time gardening and less time sneezi...

Grevillea plant

Planting & Growing 11 ground covers for your garden Whether you’re looking to cover a large area or simply fill some space between plants in a garden bed, there are many types of garden ground covers to consider. Some have a scent, some feature flowers and all vary in leaf colour, density and coverag...

front yard raised timber garden bed 01:04

Planning & Projects How to give your front garden a D.I.Y. makeover With some simple D.I.Y. skills, you can transform your front yard into something special that will improve your home’s street appeal.

spring flowers

Planning & Projects Spring gardening tips and ideas Spring is the best time to get out in the garden. The winter chill has gone, the days are getting longer and your garden is about to burst into life. Bunnings Greenlife buyer Katrina Gatt has some great ideas to get your garden looking its best over...

Gardening for kids

Planting & Growing Gardening for kids Gardening is great for the kids—it teaches them a love of nature and the environment, where food comes from, how to care for plants and the joy of reaching a goal. Here are some ideas to get them outside and in the garden.

Person cutting the corrugated edging 03:08

Planting & Growing How to install garden edging Garden edging can help to make your garden beds look neat and tidy. We’ll show you how to install plastic or corrugated garden edging around your garden.

grow herbs

Planting & Growing How to grow herbs indoors Herbs are one of the most rewarding plants to grow. But you don’t need a big garden to reap the tasty benefits. All you need is a sunny window or two and a little bit of time. Get started with these inside tips from Bunnings’ Greenlife Buyer Sharyn ...

Raised garden bed 06:44

Planting & Growing How to build a raised garden bed with sleepers Check out our simple, step-by-step guide on how to build a raised bed garden from sleepers.

Position and fill your greenhouse 03:47

Planting & Growing How to build a greenhouse A greenhouse gives your plants every chance to thrive while protecting them from harsh weather.

Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.
Top of the content