Verticillium Wilt - Ask Extension
I have an Emerald Queen Norway Maple and a Catalpa in my back yard, and grew them both from very small trees over the past 16 years. Recently, I've no...
Knowledgebase
Verticillium Wilt #206575
Asked August 13, 2014, 10:44 PM EDT
I have an Emerald Queen Norway Maple and a Catalpa in my back yard, and grew them both from very small trees over the past 16 years. Recently, I've noticed curling of the leaves on the Maple and it concerns me that it may be infected with Verticillium Wilt or some other disastrous disease. Both trees are very beautiful and I fear if the Maple is infected the Catalpa is soon behind. If I send a photo would that be help for diagnosis?
Thank you
Douglas County Colorado
Expert Response
Yes - please send a photo. I will make identification of the problem much easier. Include the ground around the tree and close-up of leaves, plus a picture of the entire tree.
Thank you.
Thank you.
Thank you for your reply. I'm having difficulty getting an adequate photo due to the time of day. I'll probably get a better shot in the AM. Upon closer inspection the curling or drying of the leaves is only occurring on a few outer outer branches.
thank you kindly ...
thank you kindly ...
While we wait for the better photos, please tell us a bit about where the trees are located , ie are they in a garden area, exposure, age.? How long have the trees been there? Tell us about the soil in your planting area. Do you fertilize? Any recent disturbances in the area? Watering by drip, sprinkler, no extra watering beyond rain?
Thanks...
Thanks...
The Emerald Maple is planted amongst a xeriscape in my west facing backyard in close promoting to a Catalpa. The neighbors have since added their trees, in uncomfortably close proximity, as you can see. At the time if planting,16 years ago, the soil was tilled mulched and amended. All plants and tress were professionally planted together. The soil in Highlands Ranch is awful, clay, almost like concrete. I fertilize occasionally. What are your recommendations?
No recent disturbances, we have no pets, just rabbits, squirrels and birds.
I water usually once a week, as needed. This year less frequent waterings. When I water I usually do so for 30 minutes in several zones.
http://www.ext.colostate.edu/pubs/garden/07211.html
Until we receive the other pictures, we'll send information about watering trees. It looks like the ground around the trees is very dry so additional watering may be necessary especially if there are a lot of trees in the area competing for the water. Trees that are drought stressed can have wilting, curling leaves, yellowing, browning, or scorching. It's hard to tell in the pictures what is happening with them. If you go to www.pwsd.org and then to the "caring for trees in dry climates" there is a lot of information on trees and water.
Thanks from the Douglas County Master Gardeners
Until we receive the other pictures, we'll send information about watering trees. It looks like the ground around the trees is very dry so additional watering may be necessary especially if there are a lot of trees in the area competing for the water. Trees that are drought stressed can have wilting, curling leaves, yellowing, browning, or scorching. It's hard to tell in the pictures what is happening with them. If you go to www.pwsd.org and then to the "caring for trees in dry climates" there is a lot of information on trees and water.
Thanks from the Douglas County Master Gardeners
