I have a two-year-old apricot tree about six feet tall growing in a salvaged water tank. Many if not most of the leaves have one or more of little "blisters" on their stalks, as shown below (each blister is about a millimeter across).

Is my tree diseased? Can I cure it?

I don't know if it's related, but there are several blobs of clear sticky resin on the main woody stem / branches (some up to the size of a small marble).

enter image description here

  • More pictures please, this is certainly some sort of scale. An easy peasy type of sucking insect to control. More pictures!!
    – stormy
    Jun 25 '16 at 20:40
  • Photo of the main trunk please including the sticky blobs..
    – Bamboo
    Jun 25 '16 at 23:11

It is ok. They seem the extrafloral nectaties common in many Prunus. They just seems larger then normal (but also the petiole seems larger and more red that normal, I think because of late season).

See e.g. http://www.botgard.ucla.edu/html/botanytextbooks/lifeforms/antplants/extrafloralnectaries.html or with "Prunus extrafloral nectaties" in Google Image.

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