Possible Tree Disease

Discussion in 'Organic Lawn Care' started by The LawnSmith, Feb 28, 2005.

  1. The LawnSmith

    The LawnSmith LawnSite Member
    Messages: 67

    I have a question for the pros here. I have a client that has black spots on the leaves of his pear tree. Could it be a soil problem? I have a lawn care business and don't have the background for tree diseases. I told him I would research it and get back to him.

  2. Garden Panzer

    Garden Panzer Banned
    from Seattle
    Messages: 313

    chop it down and plant lawn.....

  3. kickin sum grass

    kickin sum grass LawnSite Senior Member
    Messages: 628

    It could be insects producing honeydew and then sooty mold growing around the food source. Check for signs of other insects.
    It could be a disease causing your spots but you will need some pics posted for any good answers.
  4. Neal Wolbert

    Neal Wolbert LawnSite Senior Member
    Messages: 407

    Pear scab may be the culprit depending on specie and spring weather (wet is worse). Have had occasion to be puzzled by spots on pear in the past. One time a pathologist id'd fire blight on spotted leaves but that was unusual. Treat to prevent scab 2 times, at green tip and during bloom with a good scab product like Banner or one of the new phosphite fungicides. Neal
  5. The LawnSmith

    The LawnSmith LawnSite Member
    Messages: 67

    Thanks, I have heard of Fire Blight and did some online research, but the symptoms showed curled and black leaves. This tree has small black spots and no curling of the leaves. I'll look into Pear Scab and what the symptoms are. Again....Thanks :dizzy:
  6. Neal Wolbert

    Neal Wolbert LawnSite Senior Member
    Messages: 407

    Fire Blight symptoms can be a bit different at times according to the Dr. So best not rule it out. Good hunting. Neal
  7. AlpineNaturescapes

    AlpineNaturescapes LawnSite Member
    Messages: 149

    I had a client last year with the same - it appeared in a matter of days. At first I too suspected fire blight, but it didn't develop the characteristic shepherd's crook. It got better after he sprayed it - so ruled out fire blight.

    Decided it was probably pythium - try an antifungal labeled for pear. Gardens Alive has a product called soap shield - since they sell it, it must not break the organic criteria? Works well for me.

Share This Page