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    Author(s): Jerry Van SambeekJenny. Juzwik
    Date: 2010
    Source: Walnut Council Bulletin. 37(1): 10-12.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (777.55 KB)

    Description

    For the last decade, we have watched as the granulate ambrosia beetle (GAB) formerly the Asian ambrosia beetle spread into the southern region of walnut. Now we are asked to watch for the possible invasion of the thousand canker disease (TCD) complex into the eastern United States assuming we cannot prevent its invasion from the western United States. For both pest problems, we need to watch our walnut trees for symptoms that include leaf flagging or yellow wilted leaves on one or more branches (also symptoms of several, less important problems), dead or dying branches retaining dead leaves, and emergence of epicormic sprouts on large branches and main stem.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
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    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, shobrla@fs.fed.us if you notice any errors which make this publication unusable.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Van Sambeek, Jerry; Juzwik, Jenny. 2010. What's killing my walnuts – how to find help. Walnut Council Bulletin. 37(1): 10-12.

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