ShadyStump
Imperial Masterpiece
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Are these the scale people talk about all the time? Aside from the general garden pests like aphids and grasshoppers I've not had any real issues with bugs or disease so far, so I'm unsure.
I've moved the tree away from all the others for the time being. Haven't noticed them on anything else so far.
I have neem oil on hand, but that's it.