Please Identify This Fatty Stuff

Avril brown added on November 24, 2016 | Answered

Please, can you tell me what to spray onto this still very healthy shrub? It's infested with theses fatty lumps that are in the apex of the branches, see attached. Many thanks, Avril.

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Certified GKH Gardening Expert
Answered on November 24, 2016

These look like galls, which are abnormal growths on a plant caused by an insect or disease infestation. If the lumps are only on one or a few branches, the best treatment is to remove those branches, wiping your pruning tool between cuts with a 10% bleach in water solution to prevent the spread of disease.

Here is more information on galls:

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Avril brown
Answered on November 24, 2016

I forgot to mention that when you break if off, it has a Cayene pepper looking powder inside. It seems to be a parasite. Once I have removed the larger lumps, would oleum be effective?

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