leaf spot on hollies...treatment?

Discussion in 'Pesticide & Herbicide Application' started by GarPA, Apr 11, 2003.

  1. GarPA

    GarPA LawnSite Silver Member
    from PA
    Posts: 2,585

    we had an earlier thread in which we talked about how much leaf spot there seems to be on hollies this spring...some of us thought it was dessication but after the gurus evaluated it it looks like leaf spot. I tried to get some feedback on whether the shrubs will recover without treatment. I have a couple of 10 footers that are in bad shape...losing at least 50% of their leaves. Any input on what to do would be greatly appreciated..thanks
     
  2. NAT

    NAT LawnSite Member
    from Zone 7
    Posts: 96

    maybe winter damage ,too much moisture/phytophthora rootrot or drought stress from previous year. take sample to local extension office.:dizzy:
     
  3. HBFOXJr

    HBFOXJr LawnSite Bronze Member
    Posts: 1,712

    They should bounce back. Feed them. The old diseased tissue on the ground may also result in higher disease pressure this year under the proper circumstances.

    Type in "leaf spot holly or hollies" into major search engine to learn more. Also go here Rutgers University

    There is a ton of info out there but you must go find it. It won't be on this site.
     
  4. GarPA

    GarPA LawnSite Silver Member
    from PA
    Posts: 2,585

    I did research one of the sites you guys recommended and it was somewhat helpful. Yes I will rake up the dead and keep raking as they fall...I assume HollyTone is an appropriate food right now?.Obvoulsy I'm no tree disease expert....I've lost too many trees the past couple of years so I think I actually might hire a service this year to keep an eye on things feed, spray etc....trees take too long to grow and losing them is not worth the few bucks for a specialist to keep an eye on things
     
  5. NAT

    NAT LawnSite Member
    from Zone 7
    Posts: 96

    Hollies will most likely recover with a new flush of growth this spring. Fertilize with Holly Tone and even supplement with a liquid/quick fix once you begin to see a new flush. You can spray with Miracid or go to the local supplier and ask for a suggestion of a liquid root feeding fert. Next year, in the late fall, spray/ apply an antidessicant like Wilt Pruf ( another good source of income too). I don't think you need to sub out unless you rarely visit the property. Once the flush occurs, if you need to shear them to get them to fill-in, then do so. Just quit pruning about mid summer.
    you can always check their viability by scratching the bark and checking for green, living material inside. If it's brown, prune that section off.
     
  6. GarPA

    GarPA LawnSite Silver Member
    from PA
    Posts: 2,585

    Thanks Nat...the reason for getting a shrub/tree service is because this problem is on MY property!!...and man I hate losing specimens...I'll follow your advice
     
  7. NAT

    NAT LawnSite Member
    from Zone 7
    Posts: 96

    If you decide to let a company take care of your shrubs, then be sure and get someone like a certified arborist. I hate to insult anyone but many so called generic big companies are not very good and thier service is really lame. I would also look into some type of IPM program with a company. What kind of Hollies are these? I like accountability and you won't get that with those "big" companies. They'll send out a new tech every time. You need the same tech every time. Good Luck.
     
  8. GarPA

    GarPA LawnSite Silver Member
    from PA
    Posts: 2,585

    Good point Nate...I'll go with a local co. that I know, knows their stuff...I'll also check their prof. credentials as well. These are Nellie Stevens hollies....dont see many of these around.
     
  9. NAT

    NAT LawnSite Member
    from Zone 7
    Posts: 96

    Ok. Nellies are not as abundant up north. They are here! I don't care if I ever see another Nellie! They are not as cold hardy if my memory serves me. If the leaves are turning solid yellow and dropping, it could be that they are just shedding due to shock, be it cold, wind, whatever. They should flush pretty soon. The wilt pruf is excellent in helping to prevent the winter dessication. Also, I don't know if you pruned them last fall, but if you did OR they put out a new flush of growth in the fall and got burned by frost, that can cause the same thing. Most hollies, like magnolias or other broadleaf evergreens go through a normal shedding at the time they are about to flush. It sounds like yours is a bit abnormal but I just thought you might want to be aware of that.
    Nellies grow like a weed here. They will put out a good 24 inches a year easily. They keep me in business! So, keep them sheared in an effort to keep them tight and full vs. leggy and spindly. Since this is your property, the Miracid is a great all purpose quick feed and you can just spray them about every 2 weeks with your garden hose and miracle grow sprayer attachment. Here in VA, it's hard to find good tree/shrub companies. IF I need to sub to a contractor I only use Bartlett Tree service. They are very professional and only hire educated, experienced techs. Bartlett also employs IPM practices and that is our method of disease and insect control. Bartlett is very large, but of the large corps, they are the best in my opinion plus they have their own laboratories for testing. Otherwise, go very small.
     
  10. GarPA

    GarPA LawnSite Silver Member
    from PA
    Posts: 2,585

    Nate..I did Wilt Pru them in late Novemeber. Re: the leaves, many are solid brown ...both on the ground and on the plant. Others are half brown...none are yellow. A couple guys here said that if there is a purple or dark brown border between the green and brown on one leaf, it is likely leaf spot. They have shed b4 but nothing like this...I did keep them moderately watered thru the heat and drought and fed Hollytone in the fall. Perhaps its a combination of winter and leaf spot...in any event they are some sad looking plants right now. thanks again for the tips.

    and yes Bartlett has an excellent reputation ....I will call them but I suspect what they want for service fees is going to be very high...I dont mind a high price....but within reason...whatever that means!!! now I sound like some of my customers.....
     

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