soils, and on other soils M.26 would be the most 

 desirable, since it generally costs less than the 

 double- worked tree, M.9/MM.106. 



M.9/MM.111 was included in the study be- 

 cause of the reputed wide adaptability of the 

 MM. Ill root. It provided no advantage over 

 M.9/MM.106 on the driest soils, and it per- 

 formed very poorly on the wettest sites. These 

 results, along with the results of other studies 

 showing the excessive suckering potential of 

 M.9/MM. Ill, suggest that it is not a reasonable 

 selection, regardless of soil conditions. 



M.7A provided little advantage on any soil, 

 since it did not produce a yield efficient tree; 

 however, M.7Ais less sensitive to collar rot than 



M.26 or MM. 106 and likely would survive longer 

 in wet soils. On the other hand, because of the 

 poor efficiency of M.7A, it may be more cost 

 effective on wet sites to correct the drainage 

 problem and use M.26 as a rootstock, than to 

 plant inefficient trees. 



Acknowledgements 



The authors would like to thank Dave 

 Shearer, Harvey and Marvin Peck, Bud and 

 Barry Wiles, Tony Lincoln, Dorrance Greene 

 and Steve Smedberg, Frank and Bruce Carlson, 

 Ed O'Neil, and Tony Rossi for the use of their 

 land and their cooperation with this project. 



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New England Fruit Meetings 

 & Trade Show 



The New England Fruit Meetings & Trade 

 Show are sponsored annually by the tree fruit 

 grower organizations of New England, the New 

 England University Cooperative Extensions, 

 and the New York & New England Apple Insti- 

 tute. Each year, a two-day educational program 

 is presented, including a variety of topics in 

 horticulture and pest management. The trade 

 show runs concurrent to the educational pro- 

 gram and has from 90 to 100 exhibitors. In 1992, 



the meetings will be held on January 22 and 23 

 at the Sheraton Host Hotel (same place as in 

 1989, 1990, and 1991; however, the facility has 

 changed its name). Future dates include Janu- 

 ary 20-21, 1993, January 19-20, 1994, January 

 18-19, 1995, January 17-18, 1996, and January 

 22-23, 1997. For further information on the 

 program contact Wesley Autio (413-545-2963), 

 or on the trade show contact Robert Smiley ( 508- 

 422-6595). 



Fruit Notes, Summer, 1991 



13 



