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Sunday, August 28, 2016

Chinese Pistache Trees with Verticillium Wilt Disease?

Q. We have two Chinese pistache trees in our backyard that appear to have verticillium wilt. Any suggestions?

A. How did you confirm this disease? Do you have isolated branches that are dying back? It is rather rare to have this disease in a home landscape. Not impossible, but rare.If you are correct than this could impact your entire landscape and future plant selection.
            I am sending you a link so that you can look at pictures of this tree when it has verticillium wilt. Readers can also see this link on my blog. 

            There is not much that you can do if you in fact your trees do have verticillium wilt. It is fairly easy to diagnose if you know what to look for.
            All you can do now is make sure the trees are not getting too much water, not fertilized with too much nitrogen and prune out the infected limbs.
            This disease is in the soil so planting in this spot with susceptible woody trees is not a good idea. You can use ornamental grasses and pines in this spot since they don’t get this disease.

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