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what is this on my willow tree?

Hi, i have 2 kilmarnock willows which i adore. They are both suffering from rust, which i know they can be prone too. But on the underside of the leaves i have noticed white/cream ball type growths which are raised, as seen in the photos. Is this part of the rust, or do i need to be concerned? thanks

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Caused by gall mites - provided the infestation isn't extremely heavy, no harm to the plant results from these. Unrelated to the rust condition.

19 Jun, 2011


Sorry Bamboo, its a Gall Wasp.

But still doesn't really cause the tree any harm.

19 Jun, 2011


thanks both of you. Should i pick the leaves off that are infected?

19 Jun, 2011


No need really. If its just a few you could.

19 Jun, 2011


Well, gall mites, gall wasp, still a gall, lol! I didn't check which particular beastie might cause it, to be honest...

20 Jun, 2011

How do I say thanks?

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