What are weird red things on my elm leaves?
David01568
attachments on many of its leaves, as many as 3 on some leaves. They're
hollow (I cut one open) and attached to the leaf at just one end. On the
underside of the leaf, in the area where these growths are attached, the
leaves seem to have suffered some insect damage.
A call to Miller's Nursery (the generally helpful folks from whom we
bought the tree) wasn't successful in identifying this phenonomen, nor was
a browse through the Ortho book at the local garden center.
Anybody out there able to identify what these things are, and what we
ought to do about them?
Ted Swirsky
: Our three-year-old elm tree has developed weird little bright-red
Sounds exactly like leaf gall. We had some on our Silver Maples and I
found a very clear picture in the Ortho book. Try looking under MAPLE.
The book said it's an insect and not to worry unless your tree is very
heavily infested.
Richard Campbell
|> Our three-year-old elm tree has developed weird little bright-red
|> attachments on many of its leaves, as many as 3 on some leaves. They're
|> hollow (I cut one open) and attached to the leaf at just one end. On the
|> underside of the leaf, in the area where these growths are attached, the
|> leaves seem to have suffered some insect damage.
|> A call to Miller's Nursery (the generally helpful folks from whom we
|> bought the tree) wasn't successful in identifying this phenonomen, nor was
|> a browse through the Ortho book at the local garden center.
|> Anybody out there able to identify what these things are, and what we
|> ought to do about them?
Sounds like a type of gall. Some insects will cause this type of damage.
I think they lay their eggs in the leaf but don't quote me on that.
Don't know a treatment as I've never had to deal with them but I
understand they're generally not harmful except to the way the leaves
look. I guess if it's a bad case you may want to attempt some sort
of control but I don't think the tree's health will suffer.
--
Rich Campbell, USDA zone 7 (near Dallas)
You mean dig up the soil,
pull all the weeds, plant
the seeds, pull some more
weeds, water the seeds,
and pull some more weeds?
- C.B.
ri...@ti.com
kl...@cobra.uni.edu
> Our three-year-old elm tree has developed weird little bright-red
> attachments on many of its leaves, as many as 3 on some leaves. They're
> hollow (I cut one open) and attached to the leaf at just one end. On the
> underside of the leaf, in the area where these growths are attached, the
Sounds like a leaf gall. There's a book on plant galls that I ran
into about 15 years ago that was very complete, but I'm unable to
dredge up title or author. You might try to see if the card catalog
at Iowa State (isn.iastate.edu; login as "scholar" twice) will help.
It's down on my end at present.
Kay Klier kl...@cobra.uni.edu
Christine A. Owens
writes:
>
>Our three-year-old elm tree has developed weird little bright-red
>attachments on many of its leaves, as many as 3 on some leaves.
They're
>hollow (I cut one open) and attached to the leaf at just one end. On
the
>underside of the leaf, in the area where these growths are attached,
the
>leaves seem to have suffered some insect damage.
>A call to Miller's Nursery (the generally helpful folks from whom we
>bought the tree) wasn't successful in identifying this phenonomen, nor
was
>a browse through the Ortho book at the local garden center.
>Anybody out there able to identify what these things are, and what we
>ought to do about them?
>
They are leaf galls. Inside each is an insect egg. Prune them off,
and spray the tree with pyrethin to kill the adults. And, I am
ASTONISHED that a nursery or garden center was not able to identify
them.
Chris Owens