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What is this? Please help

Discussion in 'Nursery' started by mbsfield, Nov 15, 2016.

  1. mbsfield

    mbsfield ArboristSite Lurker

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    Can anyone identify what this issue might be? The disease is on a potted Japanese red maple.

    [​IMG][​IMG]

    Sent from my SM-N910T using Tapatalk

    Sent from my SM-N910T using Tapatalk
     
  2. DR. P. Proteus

    DR. P. Proteus Addicted to ArboristSite

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    Its a kind of insect, they call them mites or scale. I think some soapy water should do the trick or you could get so kind of spray at the hardware store. Sevin?
     
  3. arborgeek

    arborgeek Just hanging out

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    You can get some horticultural oil and spray it at 1-2% mix rate. I have used soapy oil for aphids, and it works well. I have never tried soap for scale, but hort oil is inexpensive and works well for scale. Just don't spray hort oil on a blue spruce. The oil will drain the blue color out and they will turn back to the normal green of a spruce. The new growth will be blue again, but they look awful for a while.
     
  4. ValleyFirewood

    ValleyFirewood Addicted to ArboristSite

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    Indoor tree?
     
  5. Del_

    Del_ I was cured all right.

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    "Oil-sensitive Plants
    Several plants are susceptible to oils: maples, particularly Japanese and red maple; hickories and black walnut; plume cedar ( Cryptomeria japonica ) and smoke tree ( Cotinus coggygria ). Injury to these plants can occur from either dormant or summer oil applications. Several plants are also somewhat sensitive: redbud, junipers, cedars, spruce, and Douglas firs."

    http://www.colostate.edu/Dept/CoopExt/4dmg/PHC/hortoil.htm

    Imacloprid may be best. Always, always, always make sure that the plant you are treating and those nearby are not susceptible to damage from the control being used. Read up on scale control:

    https://entomology.ca.uky.edu/files/efpdf2/ef427.pdf
     
  6. Buckshot00

    Buckshot00 00

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    White scale.
     
  7. ironman_gq

    ironman_gq Addicted to ArboristSite

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    Cheap easy thing to try without much chance of damaging the tree would be permethrin spray. Can be found at most feed stores and even walmart under the brand name Sawyers in the camping area. Usually used to treat clothing for ticks but it kills just about anything in the insect world on contact. Not good for cats and fish though, other animals are safe at normal dosages just don't drink the stuff.
     

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