Knowledgebase
Why Did My Walnut Tree Die #768256
Asked August 20, 2021, 10:02 AM EDT
Jefferson County Colorado
Expert Response
Hi Donald, I need to gather just a little more information.
What product did you use to kill the aphids, and do you remember when you first noticed the aphids and sprayed? Could you also send a few pictures of the tree from closer up and from further away?
Thanks for the reply. Hope these photos will work for you. I first noticed the aphids when the sidewalk below the tree was wet and sticky. Tree at the time was fully leafed out.
From: Ask Extension <<personal data hidden>>
To: Donald E King <<personal data hidden>>
Sent: Tue, Aug 31, 2021 12:28 pm
Subject: Re: Why Did My Walnut Tree Die (#0038187)
Thanks for the reply. Hope these photos will work for you. I first noticed the aphids when the sidewalk below the tree was wet and sticky. Tree at the time was fully leafed out.
From: Ask Extension <<personal data hidden>>
To: Donald E King <<personal data hidden>>
Sent: Tue, Aug 31, 2021 12:28 pm
Subject: Re: Why Did My Walnut Tree Die (#0038187)
Hi Donald, from the pictures it sure does appear that much of your tree is dead but that it is attempting to regrow (epicormic growth). I am providing a link with general information for further assessing the tree: https://extension.umd.edu/resource/how-do-you-decide-when-remove-tree
This following link is to a website that can help you find an arborist certified with the ISA (International Society of Arboriculture): https://www.treesaregood.org/findanarborist/arboristsearch