Grey pustules on Meconopsis leaf

Grey pustules on Meconopsis leaf

Observation - Grey pustules on Meconopsis leaf. Description: Pustules soft, grey outside, brown inside. I mm ø. Found on both sides of the leaf. I assumed at first that it was fungal, then wondered if it was a gall.

Pustules soft, grey outside, brown inside. I mm ø. Found on both sides of the leaf. I assumed at first that it was fungal, then wondered if it was a gall.