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Could someone help me identify what has occurred on the leaves of my pieris please.


  • Papi JoPapi Jo Brittany, France Posts: 3,577
    Your pieris might be a victim to the infamous andromeda lace bug. See this discussion.
    Could you please post some photos of the underside of the leaves?
    You are invited to a virtual visit of my garden (in English or in French).
  • bédébédé Surrey Hills, acid greensand.Posts: 202
    edited August 2021
    Does it rub off with a wet finger?  It might be algae.
  • My pieris has always looked like yours during the summer. Thought it was red spider mite?

  • FairygirlFairygirl west central ScotlandPosts: 47,190
    Here's some info on the lacebug

    It's most common in the south of England, but it may well be spreading further. Never seen it here, but we're a long way from the south of England. 
    It's a place where beautiful isn't enough of a word....

    My pieris has this every year, just on a few leaves.  I haven’t seen any long term damage from it though.  

    I feed it with an ericaceous liquid food a couple of times during the summer, perhaps this gives it the strength to resist disease ?
  • I spray mine immediately after flowering to reduce infestation. Feeding also recommended.
  • bédébédé Surrey Hills, acid greensand.Posts: 202
    Igrow, Your pics do look more like spider mite, but difficult to be sure without a magifying glass.  There will be fine cobwebbing on the underside and you can see the little mites moving about.  (Called two spot mite in USA, a better name, as they are not red.)
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