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Anthony
I have callistemons whose leaves are infested with little lumps. What is causing this and what should I do?

I also have an ant problem with these bushes, with what appears to be sooty mould but that has abated in recent weeks. I did prune back a bit too harshly last winter - maybe this caused it.

Submitted: 11:47AM, 08 Apr 2012
Answer: Hi Anthony,

The small lumps covering the Callistemon are probably scale insects. These insects have a waxy coating and produce a sugary substance when they feed. This attracts ants to the bush and causes sooty mould to develop.

The scale can be treated with Yates Natures Way Citrus & Ornamental Spray

The help improve the plant’s health apply some liquid fertiliser such as Yates Uplift Organic Liquid fertiliser which is suitable for native plants.

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Answered: 10:07AM, 13 Apr 2012

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