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THE Valuable WALNUT

11/30/2016

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Many a holiday meal includes the nuts of one of Virginia's tallest and most valuable commercial trees - the walnut (Juglans nigra).  Walnuts are known for their high protein content and oil, utilized by many Native American tribes in the east as well as the attractive dark dye which comes from the walnut husks and is used to dye reeds and wood for basketry.
Small mammals relish the nuts, particularly in the spring when freezing and thawing temperatures help to break open the tough exterior.
The rich, dark wood is prized for furniture, the hard wood lending itself to large, functional pieces like cupboards and sideboards and also for  interior architectural embellishments such as stair bannisters and cabinetry .
The roots of walnut trees are allelopathic - they emit a biochemical which discourages the growth of competing plants, however, other native plants do not seem to be as susceptible to the effects of these chemicals as do non-native species.
A close relative, the white walnut or butternut (Juglans cinera) also grows in Virginia and is similar to black walnut but produces smaller, but still edible, nuts.
Unfortunately, Thousand Cankers Disease poses a threat to walnut trees and currently, ten Virginia counties and six cities are under quarantine. The disease, a fungus carried by a bark beetle, was first discovered in the west but has moved east and is now affecting the native range of black walnut.

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Foliage
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Immature fruit
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Walnut tree canopy
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Furrowed bark of a mature tree
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Silhouette of a mature tree
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Leaf Scar
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Walnut Sphinx moth
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Butternut woolly worm
According to Dr. Douglas Tallamy in his seminal book Bringing Nature Home, the walnut is the host of more than 100 Lepidoptera species. A couple of the more unusual are the Walnut Sphinx Moth and the peculiar Butternut Woolly worm. 
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  • Home
  • About Us
    • Chapter Administration
    • Sponsoring Agencies & Partners
    • In Memory Of
  • Events & News
    • Upcoming Events
    • Chapter Awards & Recognition
    • Spotlight on Members and Presenters
    • Newsletters
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    • Become a VMN
    • Continuing Education >
      • Continuing Education Programs
      • CE Resources >
        • Field Guides
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  • Volunteer Projects
    • Approved Volunteer Projects
    • Project Accessibility Information
    • Activities by Interest >
      • Activities From Home
      • Animals
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      • Habitats & Trails
      • Plants & Trees
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    • New Project Proposal Request
  • Nature Blog
  • Contact Us