Early Performance of Summerland Red 

 Mcintosh on Various Rootstocks 



Wesley R. Autio 



Department of Plant & Soil Sciences, University of Massachusetts 



A number of articles in Fruit Notes have 

 reported the results from apple rootstock trials, 

 particularly those established by the NC-140 

 Technical Committee on Rootstocks. Several 

 years of reliable data have been accumulated on 

 Mark, Ott.3, M.9 EMLA, Bud.9, P.2, P.22, C.6, 

 etc.; however, all of these trials have used Deli- 

 cious as a scion. Clearly, in New England we are 

 not greatly concerned with Delicious, and the 

 1989 Apple Survey showed that the acreage of 



Delicious in New England is declining dramati- 

 cally. 



To study performance of various rootstocks 

 using a more appropriate scion for New En- 

 gland, a trial was established in 1985 at the 

 University of Massachusetts Horticultural Re- 

 search Center in Belchertown using 

 Summerland Red Mcintosh on M.9/Alnarp 2, 

 Ott.3, M.7 EMLA, M.26 EMLA, M.7A, OAR 1, 

 and Mark. The soil is a Montauk fine sandy 



10 



Trunk cross-sectional area (in ) 



M.9/A.2 



Ott.3 



M.7 EMLA M.26 EMLA 



M.7A 



OAR 1 



Mark 



Figure 1. Trunk cross sectional area after the 1990 growing season of Summerland Red 

 Mcintosh trees on various rootstocks planted in 1985. Bars with any letter in common are 

 not significantly different at odds of 19:1. 



Fruit Notes, Summer, 1991 



