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

Posts

• Papi Jo Posts: 4,254

  August 2021

  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?
  

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• bédé Posts: 3,095

  August 2021 edited August 2021

  Does it rub off with a wet finger?  It might be algae.

   location: Surrey Hills, England, ex-woodland acidic sand.
  "Have nothing in your garden that you don't know to be useful, or believe to be beautiful."

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• Igrowfromseed Posts: 284

  August 2021

  My pieris has always looked like yours during the summer. Thought it was red spider mite?
  
  

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• Fairygirl Posts: 55,117

  August 2021

  Here's some info on the lacebug 
  https://www.rhs.org.uk/advice/profile?pid=663
  
  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....
  
  
  
  I live in west central Scotland - not where that photo is...

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• ERICS MUM Posts: 627

  August 2021

  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 ?

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• AaronBil Posts: 100

  August 2021

  I spray mine immediately after flowering to reduce infestation. Feeding also recommended.

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• bédé Posts: 3,095

  August 2021

  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.)

   location: Surrey Hills, England, ex-woodland acidic sand.
  "Have nothing in your garden that you don't know to be useful, or believe to be beautiful."

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