Tree Disease & Pests in Perth

A struggling tree rarely fails overnight - it usually shows warning signs first. Knowing what to look for in Perth's climate means you can act early, often saving the tree, and avoid the danger of a diseased limb or trunk failing unexpectedly.

Warning signs to watch for

• Canopy dieback - dead or bare branches in the upper crown while the rest leafs out.
• Off-colour or early leaf drop - yellowing, scorch or thinning foliage out of season.
• Fungal brackets or mushrooms at the base or on the trunk - often a sign of internal rot.
• Oozing, staining or peeling bark - and fine sawdust or small round holes, which can point to borers.

A single symptom may be harmless; several together usually mean it's worth getting the tree assessed.

Common culprits in Perth

Perth trees deal with drought and heat stress, fungal root rots (especially on damp or compacted soils), and wood-boring pests. The polyphagous shot-hole borer has also been a concern for trees across the Perth metro in recent years. Stressed trees are far more vulnerable, which is why steady watering through summer and sensible pruning are the best prevention.

When to call an arborist

If a tree shows dieback near the house, fungal growth at the base, or signs of borer, get it looked at - both to try to save it and to judge whether it's becoming a hazard. San's Tree Service assesses sick and failing trees across Perth, advises on what can be saved, and removes the ones that can't. Call (08) 9560 6103.

This is general guidance; a sick tree near your home should be inspected in person before any decision.

Frequently asked questions

What are the signs of a sick or dying tree?

Watch for canopy dieback (bare or dead branches up top), early or off-colour leaf drop, fungal brackets at the base, oozing or staining on the trunk, bark falling away, and fine sawdust or small holes that can signal borers. One sign alone may be minor; several together warrant an arborist's look.

Can a diseased tree be saved?

Sometimes. Caught early, problems like deadwood, minor fungal issues or stress from drought can be managed with pruning, better watering and care. Advanced decay, root disease or serious infestation often can't be reversed, and removal becomes the safe option.