Native Plants Pests and Diseases

Native Plants Pests & Diseases Psyllid Leaf Damage - Natives R Us Traveston Native Plant Nursery

Native Plants Pests and Diseases:
We are lucky here in Australia to have a vast array of unique native plant species that thrive in our diverse climatic regions.

However, just like any other garden, our native plants can also fall prey to pests and diseases that can cause significant damage.

Fortunately, there are several methods to control and treat these pests and diseases, enabling us to preserve and protect our precious native plant gardens.

Here’s a list of the most common native plant pests and diseases and how to treat them.

Scale Insects

Scale insects are one of the most prevalent pests that attack Australian native plants, especially those belonging to the Myrtaceae family. These pests are often found in clusters on the plant’s stems and leaves, appearing as small, waxy bumps. Scale insects feed on the plant’s sap, causing it to weaken and eventually die. To treat scale insects, use an insecticidal soap or horticultural oil spray. These products are non-toxic and will suffocate the pests while protecting the plant.

Myrtle Rust

Myrtle Rust is a fungal disease that affects plants in the Myrtaceae family, including eucalyptus, tea tree, and lilly pilly. It appears as yellow spots on leaves and can eventually cause defoliation. Treat by removing and destroying affected leaves and branches, and using a fungicide spray.

Spider Mites

Spider mites are tiny pests that are often found on the underside of leaves, feeding on the plant’s sap. These pests can cause yellowing leaves, leaf drop, and eventually lead to plant death. To treat spider mites, use a miticide spray or introduce natural predators, such as ladybirds or lacewings, to the plant.

Root Rot

Root rot is a fungal disease that affects the plant’s roots, causing them to rot and eventually die. It’s commonly caused by overwatering and poor drainage, leading to the accumulation of water around the plant’s roots. To treat root rot, improve the plant’s drainage by adding organic matter to the soil or planting the plant in a raised bed. Apply a fungicide spray to the plant to help prevent further infection.

Leaf Spot

Leaf spot is a fungal disease that causes circular or irregular spots on the plant’s leaves, leading to leaf drop and stunted growth. This disease is often caused by high humidity and moisture levels. To treat leaf spot, remove and dispose of any infected plant debris and maintain proper plant hygiene. Apply a fungicide spray to protect the plant from further infection.


Whiteflies are small, winged pests that feed on the plant’s sap, causing leaf yellowing and stunted growth. These pests can also transmit viral diseases to the plant. To treat whiteflies, use a neem oil spray or introduce natural predators, such as parasitic wasps or ladybirds, to the plant.

By regularly inspecting your plants for signs of pests and diseases, and identifying and treating them early will prevent further damage to the plant.

With these precautions and treatment methods, you can preserve and protect your beautiful Australian native plants for years to come, without having to worry about Native Plants Pests and Diseases.

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