Rhodo disease or insect like black soot? I'm baffled.

Discussion in 'Pesticide & Herbicide Application' started by HenryB, Jul 28, 2006.

  1. HenryB

    HenryB LawnSite Bronze Member
    Posts: 1,828

    The trunk is covered with a black soot with a few small white cottonlike spots, leaves look OK any ideas?
  2. upidstay

    upidstay LawnSite Bronze Member
    from CT
    Posts: 1,348

    It's an aphid. They secrete honeydew which the Sooty Mildew feeds on. Look for ants feeding on the honeydew too. Find out specifically what type of critters you have and spray for them, or hit the shrubs hard with Merit.
  3. Dallas Turf

    Dallas Turf LawnSite Member
    Posts: 246

    Sounds like soft scale we have had allot of that down here on azaleas and crepe myrtles, Acephate and sticker to knockdown and merit to protect has been the best remedy to the pest.

    The black sooty mold is from their secereations and they squish easily and are purple around here when smashed.
  4. olive123

    olive123 LawnSite Senior Member
    Posts: 500

    look at fungus if the leaves have no insects...

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