Return to the Fruit & Orchards Forum | Post a Follow-Up

 o
carya/hickory graft compatibility

Posted by cousinfloyd 7 (My Page) on
Fri, May 24, 13 at 7:55

Does anyone know or can anyone point me to any resources that would tell me what the graft compatibility is between carya species? I'm wondering what my options are for grafting onto seedlings I already have growing wild. I also wonder if some carya might grow better on some soils on the roots of species other than their own.


Follow-Up Postings:

 o
RE: carya/hickory graft compatibility

I presume you want to graft hickory onto pecan or something similar. The general answer is that some hickory species are 64 chromosome and some are 32 chromosome. A rule of thumb is that 32 can be grafted onto 32 and 64 onto 64. However, I have pictures in a book of pecan grafted successfully onto Mockernut. The major problem with grafting hickory is that it is difficult to match the vigor of the rootstock with the scion. For example, if pecan is grafted onto most other slower growing hickory species, the resulting tree has a large diameter above the graft and much smaller stem below. It looks very unbalanced. The reverse graft of shagbark hickory onto pecan rootstock is very successful.

There are some good sources of info on the web.
Northern Nut Growers
Nolin Nursery

Here are a few of the species chromosome counts that I recall off the top of my head.

The genus Carya has 17 to 19 recognized species.
Carya Ovata - Shagbark Hickory - 32 chromosome
Carya Laciniosa - Shellbark Hickory - 32 chromosome
Carya Illinoinsis - Pecan - 32 chromosome
Carya Aquatica - Water Hickory - 32 chromosome
Carya Cordiformis - Bitternut Hickory - 32 chromosome

Carya Tomentosa - Mockernut Hickory - 64 chromosome (Mockernut is the most common hickory in southern upland soils)

DarJones


 o
RE: carya/hickory graft compatibility

E,
DarJones' post, above, is a pretty good guideline.

Most stuff I've seen from the past, by folks like Carl Weschke, suggest that pignut is worthless as an understock, mockernut variable, bitternut OK for most pecans.

For the most part, I just use pecan as an understock for shagbark and shellbark.
Friend in NJ likes seedlings of Fayette shellbark as an understock for hickories - and he seems to think an interstem of 'Fayette' conveys some vigor; heck I have a hard enough time getting one 'take', I'm not fixin' to start doing interstem grafts on nut trees!

I've seen some claims made that may or may not be substantiable - like "J.Yoder #1" is incompatible with bitternut understock, 'Fox' or 'Davis' shagbarks are compatible with mockernut, etc. Had one fellow tell me that 'Cody Cox' will not work on pecan - only on hickory - but others have told me that's BS. Some of those claims may be anecdotal at best and may be a result of failure on the part of the grafter or bad/damaged scionwood, more than a true incompatibility.
Additionally, I'm not convinced but that there may be differences in geographic 'races' of a species that may contribute to compatibility/incompatibility - but that's sheerly conjecture on my part.


 o
RE: carya/hickory graft compatibility

I can't contribute anything to this thread yet but I'm interested in what others experiences are. I also have some wild Carya species that I'm going to graft to this year. I'm new to this, but have gotten lots of help from people on this forum. Hopefully I'll have something to contribute to this thread in the future.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Fruit & Orchards Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here