- 23 - 



8. MAC 2k - Another selection in the Michigan Apple Clone series (Female 

 parent was Robusta 5). Trees on this rootstock are vigorous in the 

 MM. Ill or Standard size class. It has a shallow spreading rootsystem 

 and is well anchored. It has not been widely tested. 



9. OAR 1 - An Oregon planting of Gravenstein on seedling rootstocks made 

 in 19^3 had many trees blown over by a severe storm in 1962. Among the 

 survivors was a conspicuously dwarfed tree that was very productive. 

 Suckers of this tree were propagated by Dr. Melvin Westwood of Oregon 

 State. This stock has not been widely tested. 



Apple Rootstocks in 1984 NC-140 Planting 



1. Bud 491 - One of the hardy Budagovsky rootstock series produced at the 

 Michurin College of Horticulture in Russia. B. 491 produces trees 

 smaller than M.9, is very winter hardy, and propagates well. 



2. B.9 - One of the Budagovsky series (Red-leafed Paradise) with dwarfing 

 potential similar to that of M.9. New York tests indicate suscep- 

 tibility to fire blight, wooly aphids, and brittle roots. It is much 

 hardier than M.9 and has greater resistance to crown rot. 



3. MAC 1 - One of the Michigan Apple Clone series originated by Dr. Robert 

 Carlson from an open-pollinated planting of the Mailing rootstocks 

 (Female parent Ml). Trees on this stock are approximately M.7 size, 

 but do not sucker and are well anchored. 



4. MAC 39 - One of the Michigan Apple Clone series producing trees smaller 

 than M.9 and very precocious. Trees on this stock are not well 

 anchored. 



5. P.I - One of the Polish series produced at the Research Institute of 

 Pomology and Floriculture at Sk ierni ewicz . This series was produced 

 from a cross of Antonovka. P.l produces trees similar in size and pro- 

 ductivity to M.9, but are easier to propagate and have greater winter 

 hardi ness. 



6. P. 11 - Another of the hardy Polish series producing trees smaller than 

 M.9 with s imi lar propagat ion characteristics. 



7. Domestic Seedling - The full size standard in this trial. Seedling 

 stocks generally produce large vigorous trees with late-bearing ten- 

 dency, but good soil adaptability and anchorage. 



8. CG 10 - The Cornell-Geneva (CG) series of rootstocks was originated by 

 Karl Brase CG-10 (M.8 open pollinated) produces trees slightly larger 

 than M.9 with good anchorage and some tendency to sucker. It has 

 moderate resistance to collar rot and fire blight. 



9. CG 24 - Its parentage was open-pollinated M.8, and it produces trees 

 approximately M.26 size. 



