74 Maine Agricultural Experiment Station. 1920. 



Cross Fertility in the Apple. — Concluded. 



Variety 



Pollen 



Fruit Set No. of Trials 



Stayman 5 



Stayman 12 



Stayman 3 



Stayman 7 



Stayman 8 



Stayman 5 



Stayman 3 



Stayman 12 



Stayman 8 



Stayman 12 



Stayman 3 



Stayman 8 



Steele's Red 11 



Steele's Red 11 



Steele's Red 11 



Summer Permain 11 



Summer Permain 11 



Sutton" 



Tetofsky 11 



Tetofsky 11 



Wagener 14 



Wagener 14 



Wagener 14 



Wagener 14 



Washington 11 



Washington 11 



Washington 11 



Williams 8 



Williams 8 



Williams 8 



Winesap 11 



Winesap 13 



Winesap 14 



Winesap 13 



Winesap 13 



Winesap 5 



Winesap 12 



Winesap 12 



Winesap 5 



Winesap 5 



Winesap 12 



Wolf River 8 



York Imperial 3 



Yellow Transparent 7 



Yellow Transparent 8 



Yellow Transparent 8 



Yellow Transparent 8 



Yellow Transparent 8 



Yellow Transparent 8 



Yellow Transparent 8 



Yellow Transparent 8 



Yellow Transparent 8 



x Lily of Kent 



x Lily of Kent 



x Missouri Pippin 



x Nickajack 



x Nickajack 



x Paragon 



x Paragon 



x Paragon 



x Williams 



x Winesap 



x York Imperial 



x Yellow Transparent 



x Pumpkin Russett 



x Hoover's Red 



x Yellow Newtown 



x Salome 



x Han well Souring 



x Northern Spy 



x Mann 



x Haas 



x Ben Davis 



x Jonathan 



x Rome 



x Spitzenburg 



x Oldenburg 



x Hyde's Keeper 



x Charlottenthaler 



x Early Ripe 



x Stayman 



x Yellow Transparent 



x Arkansas Black 



x Ben Davis 



x Ben Davis 



x Grimes 



x Jonathan 



x Lily of Kent 



x Lily of Kent 



x Paragon 



x Paragon 



x Stayman 



x Stayman 



x Yellow Transparent 



x Missouri Pippin 



x Early Ripe 



x Early Ripe 



x Nickajack 



x Oliver 



x Red Astrachan 



x Red June 



x Stark 



x Stayman 



x Williams 



+ + 



+ + 



+? 



yes 

 yes 

 yes 



yes 

 yes 

 yes 

 yes 

 yes 

 yes 

 yes 

 yes 

 yes 

 yes 

 yes 

 yes 

 ++ 



++ 

 yes 



+ 

 yes 



+ 



+ 



++ 



+++ 



+ 

 +++ 

 +++ 

 +++ 

 +++ 

 +++ 



+++ 



20 

 11 

 158 



52 

 157 



14 



75 



29 



113 



102 



108 



35 



212 



Table 4 shows that of the 243 tests for cross sterility be- 

 tween two varieties 57 are recorded as not producing fruit, 186 

 as producing fruit of which 90 produced fruit but did not re- 

 cord the number of crosses made to accomplish its production. 

 These figures show that over % of the varieties crossed proved 

 compatible with each other. It will be remembered that nearly 

 Yz of those which were self fertilized showed no fruit produc- 

 tion. These facts argue strongly for the necessity of arranging 



