-8- 



Poor polllnlzers (trlploid varieties - produce much sterile pollen). 

 ^Cortland and Early Mcintosh are cross-lmcompatlble but are suitable polllnlzers 



for other varieties. 

 Melrose and Delicious are cross-Incompatible but are suitable polllnlzers for 

 other varieties. 



"One should not rely entirely on strongly biennial varieties such as 

 Early Mcintosh, Duchess, Wealthy, and Yellow Transparent as cross-pollinlzers 

 for an annual variety like Mcintosh or Cortland. Such combinations may tend 

 to make generally annual varieties biennial. When a strongly biennial variety 

 fails to bloom there is no suitable pollen supply to cross-pollinate the 

 usually annual variety. Hence, the annual variety may fall to set a commercial 

 crop In alternate years and tends to become biennial also." 



— W. J. Lord 

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