Black walnut tree - Ask Extension
I have a black walnut tree that looks extremely healthy. My tree guy is suggesting that I treat it with a fungicide and an insecticide. Can you please...
Knowledgebase
Black walnut tree #872324
Asked June 09, 2024, 7:38 PM EDT
I have a black walnut tree that looks extremely healthy. My tree guy is suggesting that I treat it with a fungicide and an insecticide. Can you please suggest whether this is the right thing to do to keep it healthy? FYI I am in Louisville Colorado. Thanks
Boulder County Colorado
Expert Response
Hi Donna,
We do not recommend any treatment absent specifically determining that there is an insect or disease problem. If you can bring in samples of the tree leaves and send in photos, we may be able to determine if there's a problem.
Please send any photos to us directly at <personal data hidden>
The extension office is located in the Boulder County Fairgrounds in Longmont on Nelson Road.
Molly H and Pat B
Boulder County Master Gardener Diagnostic Team
We do not recommend any treatment absent specifically determining that there is an insect or disease problem. If you can bring in samples of the tree leaves and send in photos, we may be able to determine if there's a problem.
Please send any photos to us directly at <personal data hidden>
The extension office is located in the Boulder County Fairgrounds in Longmont on Nelson Road.
Molly H and Pat B
Boulder County Master Gardener Diagnostic Team
