Author Topic: Hornbeam pest treatment recommendations  (Read 4867 times)

Fred

  • Legit New User
  • *
  • Posts: 5
Hornbeam pest treatment recommendations
« on: July 20, 2009, 12:00 PM »
I have a collected/imported Korean Hornbeam that has an insect issue.  I can't see mites or scale, and the tips of the leaves look chewed on.  Some of them also have holes in them.  It's been a good growing year for it but the issue seems to be getting worse.  Last year I tried neem and felt it was pretty hard on the tree and I lost a lot of growth as a result.  It's an old tree.  Any advice would be appreciated.
« Last Edit: July 12, 2010, 11:14 AM by bwaynef »
 

John Kirby

  • Hero Forum Member
  • *****
  • Posts: 2216
  • Thanked: 16 times
  • I really need an opposable thumb...
Re: Hornbeam pest treatment recommendations
« Reply #1 on: July 20, 2009, 10:05 PM »
Where are you?
 

Fred

  • Legit New User
  • *
  • Posts: 5
Re: Hornbeam pest treatment recommendations
« Reply #2 on: July 20, 2009, 10:18 PM »
Kansas City
 

John Kirby

  • Hero Forum Member
  • *****
  • Posts: 2216
  • Thanked: 16 times
  • I really need an opposable thumb...
Re: Hornbeam pest treatment recommendations
« Reply #3 on: July 20, 2009, 10:37 PM »
You guys have Japanese Beetles now? The green 1/2"or so beetles. I use merit to control them, but they still do some chewing.
 

Fred

  • Legit New User
  • *
  • Posts: 5
Re: Hornbeam pest treatment recommendations
« Reply #4 on: July 20, 2009, 10:51 PM »
I haven't seen any of those.  That's the thing, there are no pests to be found.  This year is not as bad as last year and it's been a good growing year.  I was thinking about using something mild like Safer's that wouldn't shock the tree but might help.
 

ken duncan

  • Full Forum Member
  • ***
  • Posts: 159
Re: Hornbeam pest treatment recommendations
« Reply #5 on: July 21, 2009, 06:52 AM »
Hi Fred,
I never see Japanese beetles in the day time but I see the damage.
I have seen them at night, by the hundreds, eating Crape Myrtle blooms.
Ken
 

Fred

  • Legit New User
  • *
  • Posts: 5
Re: Hornbeam pest treatment recommendations
« Reply #6 on: July 21, 2009, 09:01 AM »
Thanks, Ken.  What do you use to control them?  John suggested Merit but I've never heard of that being used on anything but a lawn.
 

MatsuBonsai

  • John Callaway
  • Administrator
  • Hero Forum Member
  • *****
  • Posts: 1398
  • Thanked: 6 times
Re: Hornbeam pest treatment recommendations
« Reply #7 on: July 21, 2009, 03:25 PM »
Fred,

If you could add your location to your profile that might save you and others from have to ask/answer.

I've got an American Hornbeam that has been severely attacked by Japanese beetles this year.  I've used granular (thanks John) and spray systemics to control them.  But, I often and still see them on the leaves chewing away.  The consolation here is that there's also a ton of them lying dead on top of the soil, so the chemicals seem to be doing the trick.

Since the beetles have been pretty bad the last several years I've been placing "beetle bags" in different areas in the woods behind my house.  That might be helping some, but there's still a swarm of them on my hornbeams, Japanese maples, Satsuki azaleas, etc.

It might be beneficial for you to find out for sure what is affecting your trees and find a measure for them.  Or, just rotate sprays for a few weeks using different chemicals that are safe for your trees.

Keep us updated on your fight!  :)
 

Tom Mounce

  • Legit New User
  • *
  • Posts: 17
Re: Hornbeam pest treatment recommendations
« Reply #8 on: July 21, 2009, 03:41 PM »
Fred, You might have slugs eating holes in the leaves at night. Do you see any silvery lines on the pot? Raise the pot up and look underneath. I use to get japanese beetles really bad a few years ago but this summer I only saw a dozen or so. I picked these off the trees and fed them to a bullfrog in my fishpond. When the beetles were heavy I used to take the trees that they liked the most (crape myrtle, contorted filbert, porcelain berry and a few others and moved them to the ground. It seemed like the beetles couldn't find the trees for a few days and when they did, I would move them again.

Tom
 

Fred

  • Legit New User
  • *
  • Posts: 5
Re: Hornbeam pest treatment recommendations
« Reply #9 on: July 21, 2009, 08:51 PM »
Thanks to both of you for your reply.  I'm out of town till thursday so I'll check when I get home.  As far as putting it on the ground, I have a 5 month old puppy....
 

bonsaikc

  • Member
  • Sr. Forum Member
  • **
  • Posts: 330
Re: Hornbeam pest treatment recommendations
« Reply #10 on: July 22, 2009, 12:00 AM »
Fred,
Thanks for coming here to ask! As I mentioned, I'm not the best resource on pests, however, I do know some pretty smart guys!

Chris
 

Steven

  • Sr. Forum Member
  • ****
  • Posts: 432
  • Kat-Su-Ra
Re: Hornbeam pest treatment recommendations
« Reply #11 on: July 22, 2009, 09:21 AM »
Just my little 2 cents worth. Also look for tiny(half inch or less usually) inchworms. But be on the look out for big ones. I have found these worms on my hornbeams(american and korean), beech(american and japanese) and other deciduous trees. The smallest I have found were about 10mm long and biggest about 3 inches. They will mimic a dead twig clinging to a branch with their hindfeet and sticking out stiff.