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What is this pest on boxwoods?

Discussion in 'Landscape Architecture and Design' started by HLM86, Dec 14, 2011.

  1. AGLA

    AGLA LawnSite Bronze Member
    Messages: 1,774

    It sounds like you did not water in the plants adequately if this happenned between October and now. It is common to get desication in late plantings of evergreens. Did you flood the holes after burying the root balls most of the way? Or did you do have moist plants and moist ground and just plant them?

    It is all about getting out any air voids in the soil by mudding them in when you plant broad leaf evergreens late. If you do not do that, the root ball will not draw in water from the surrounding soil. They desicate or stress and are subject to pests and diseases.
  2. HLM86

    HLM86 LawnSite Member
    Messages: 120

    I have ones still in the nursery containers that look like that, as well as in the ground. The picture is of one in the container. And yes, they were planted and watered in properly.
  3. jvanvliet

    jvanvliet LawnSite Gold Member
    Messages: 3,944

    I'd like to get a closer look underneath the leaves; from here it looks like it maybe thrips or scale; was there any sooty mold evidenced?

    Possible fungus, are there fine threads (looks like a spiderweb material) connection any of the lesions to the plant?

    What's on the branches, anything?

    Post the pictures to the Pest control site, lot's of pros there.
  4. HLM86

    HLM86 LawnSite Member
    Messages: 120

    I took a plant to the extension agent. He checked it out and said because of the roots circling that the root balls were so hard they couldn't absorb water and were slowing dying. I'm going to break up the root balls and go ahead and put them in the ground and see how they do.
  5. Dr.NewEarth

    Dr.NewEarth LawnSite Bronze Member
    Messages: 1,476

  6. mattfromNY

    mattfromNY LawnSite Bronze Member
    Male, from Central NY
    Messages: 1,582

    Thanks for the link Dr.NewEarth, I have a customer with a $3 mill mcmansion, that is having a similar problem, 88 wintergem boxwoods lining the driveways, many of them discoloring (I initially suspected salt, wind, damage?) and replaced 4 this fall, but since have seen a few more that look as they may soon decline rapidly as the others have. I have asked a few local LCO's, and nobody seems to have an answer. Havent yet gone to the extension agent, but that will be my next step.
  7. HLM86

    HLM86 LawnSite Member
    Messages: 120

    Thank you very much for the link Dr. NewEarth. Symptoms on my plants are identical to some of the pictures on the CT. site. I also noticed symptoms on established Boxwoods next to the ones I planted. I guess I'll be removing and burning them before this crap spreads even more.
  8. HLM86

    HLM86 LawnSite Member
    Messages: 120

    I just checked on the plants in the ground. The boxwoods on the right are the established ones. They have what appears to be the Macrophoma Leaf Spot, but they also have the brown/blighted looking foliage. The plant between the boxwoods (don't know what it is) is now infected, but doesn't have leaf spots.




  9. Dr.NewEarth

    Dr.NewEarth LawnSite Bronze Member
    Messages: 1,476

    Hey guys the British Columbia Landscape Nursery Association has just announced that the boxwood blight has entered our province> It has also been found on Sarcococca to a small degree too.

    We are being told that controls are limited. Keep this in mind with your designs and installations.

    I'm trying to reach the BCLNA for more information as the report stated only "some-where in the province.??? I'm going to presume the grower is east of Vancouver, in the Fraser Valley some-where. It appears the BCLNA office staff has left early on a Friday or else they got into the beer fridge in the meeting room. I hate voice mail!
    Last edited: Jan 6, 2012
  10. PlantscapeSolutions

    PlantscapeSolutions LawnSite Gold Member
    Messages: 3,009

    Down here in Texas the Euonymous family of shrubs (Manhatten, Boxleaf, Gold Spot, Little leaf, ect.) are all problematic and will get a variety of insect issues and even mildew. They should not be sold at all here. They should all be thrown in a compost pile along with all the Red Tips.

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