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    • MA
      Matt Abell
      11 May 2022
      0 Wish green leaves
      walnut-treeWalnut tree

      Walnut tree with rust on bark

      Hello, one of my walnut trees has an area of what looks like rust on it. When you rub it, it discolours your fingers. Any ideas of what it might be would be greatly appreciated. Thank you.

      #160071

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      Armurospecialist
      11 May 2022

      Hello. Please provide us with more details regarding your issue: if you have noticed the presence of a pest (for example holes in the leaf, stems, etc.); if you already applied treatments/fertilizer (please specify the products used, the quantity of the solution and the volume of water used at dilution); what are the temperatures/climate you are keeping the plant in?
      Also, please attach several pictures of the walnut trees in question: both overall pictures (the whole plant) and pictures of details (for example, the upper, and lower face of the leaf or stem).

      #160072
      0 Wish green leaves
      • MA
        Matt Abell
        11 May 2022

        Hello. Thank you for your message.I live in the United Kingdom, in the north of England near York. The tree is semi-mature and we never harvest the walnuts as they are usually eaten by the squirrels before we get chance to do so. So the tree serves an ornamental purpose only.
        I have only just noticed this colouring and so have no idea how long it has been like that. As we are only just coming out of winter the tree has no leaves and the new shoot buds are only just forming. It has never been sprayed/treated with anything for the last 20 years and has always been healthy. The purpose of my enquiry was purely to ascertain whether this was something we should be concerned about, that might effect the health of the tree.
        I attach some photographs. Many thanks for your help.

        Attachments:

        1. walnut-tree-with-rust-on-bark-6-160073.jpeg

        2. walnut-tree-with-rust-on-bark-6-160073-1.jpeg

        3. walnut-tree-with-rust-on-bark-6-160073-2.jpeg

        4. walnut-tree-with-rust-on-bark-6-160073-3.jpeg

          5. ‹›
        #160073
        0 Wish green leaves
        • Avatar
          Armurospecialist
          11 May 2022

          That coloration seems to be from lichens or algae that usually grows on the bark of trees and is not a cause for concern.

          #160079
          0 Wish green leaves
          • MA
            Matt Abell
            11 May 2022

            Many thanks for your reply. That explanation would make sense as there is definitely a lot of lichen growing on some of the branches.
            Thank you so much for your help.

            #160080
            0 Wish green leaves
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