Bruce,
Sounds like a borer larvae. Check out http://www.ento.vt.edu/Fruitfiles/Prionus.html which is the prionus borer that likes to attack apple tree roots. Hope this helps!
Dennis Norton
Royal Oak Farm Orchard
http://www.royaloakfarmorchard.com
http://www.theorchardkeeper.blogspot.com
----- Original Message ----- From: "bruce" <rural@threeriverwb.net>
To: <nafex@lists.ibiblio.org>
Sent: Thursday, August 10, 2006 9:34 AM
Subject: [NAFEX] Worm in apple rootstock
Yesterday I was making some grafts. On one rootstock, I made a vertical cut down the stem for a chip bud graft. When the cut piece fell away, instead of a healthy looking interior, the cut was covered with what looked like a layer of sawdust. At the base of the cut, there was a small hole and I was able to extract a small worm from the hole. It looked somewhat like a white grub, but it was diamond shaped and flat instead of round, about 1/4" long. I'm assuming the rootstock will eventually die from this damage, but I'll just leave it to see what happens. I should add that the rootstock has been in the ground for over a year and is not fresh from the nursery. Any ideas of what this worm might be?
Thanks,
bruce
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