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nafex - [NAFEX] Anchorage of M7 compared to MM 111

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  • From: "Alan Haigh" <alandhaigh@gmail.com>
  • To: nafex@lists.ibiblio.org
  • Subject: [NAFEX] Anchorage of M7 compared to MM 111
  • Date: Sun, 7 Dec 2008 10:02:29 -0500

 
Here is what the Ontario Ministry of Agriculture has to say about the two root stocks.
This tree is about the best in this class, although tree size is about 80% of standard. Though slightly more vigorous than the old M.2, the anchorage of MM. 111 is better and the tree seems adaptable to a wider range of soil conditions. Commercial stocks of MM.111 are virus-free and appear resistant to collar-rot.
As a rootstock in the orchard, M.7 has a history of poor anchorage, low uptake of potassium and frost-tender roots. Fruit production is relatively light for the first 10 years, after which ladders are needed to pick the fruit. Except where previous experience has been favourable, growers are cautioned against making extensive plantings on M.7.
 
Purdue University also stressed the tendoncy of poor anchorage of M. 7. in an advisory I found on the internet.


  • [NAFEX] Anchorage of M7 compared to MM 111, Alan Haigh, 12/07/2008

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