Pieris problem

Discussion in 'Woody Plants' started by chris, Apr 10, 2003.

  1. chris

    chris Member

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    Why do so many Pieris have a black coating in Vancouver - including mine?! The new growth is beautiful but the previous growth is covered in a black sooty like coating.
     
  2. HortLine

    HortLine Active Member 10 Years

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    pieris japonica

    You can wash the sooty mold off with water or the garden hose If the problem persists apply an insecticidal soap.
     
  3. Douglas Justice

    Douglas Justice Well-Known Member UBC Botanical Garden Forums Administrator Forums Moderator VCBF Cherry Scout Maple Society 10 Years

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    The black sooty mould that people are seeing on Pieris is growing on the excrement of andromeda lacebugs. Pieris cultivars with Pieris formosa blood (i.e., P. japonica x P. formosa -- e.g., 'Firecrest', 'Forest Flame' and 'Valley Fire') are prone to infestations,
     
  4. sunshine

    sunshine Member

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    hi chris, a usefull way to wash off sooty mold is mixing i tsp dawn detergent in a quart of water. spray on, let it set for a few minutes and hose off. it may have to be done several times.
     

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