Self Sterility and Cross Sterility in the Apple. 



71 



ing large. The -) — (- sign shows a greater percentage of fruit 

 set. The -| — | — |- sign indicates a cross which proved highly 

 compatible by the percentage of fruit which resulted from the 

 cross. 



As these data represent the crosses which have been made 

 in several states it gives an opportunity to compare the fruit 

 set of the same cross under the different environmental con- 

 ditions. 



TABLE 4. 



Cross Fertility in the Apple. 



Variety 



Pollen 



Fruit Set 



No. of Trials 



Arkansas Black 14 



X 



Jonathan 



yes 





Baldwin 



X 



Ben Davis 



— 



4 



Baldwin 



X 



Duchess 



+ 





Baldwin 



X 



Golden Russett 



+++ 





Baldwin 



X 



Northern Spy 



— 



2 



Baldwin 



X 



Rhode Island Greening 



— 



2 



Ben Davis 



X 



Baldwin 



+ 





Ben Davis 



X 



Canada Red 



+ 





Ben Davis 



X 



Crab 



+ + + 





Ben Davis 8 



X 



Esopus 



yes 





Ben Davis 



X 



Golden Russett 



+ 





Ben Davis 



X 



Gravenstein 



+ 





Ben Davis 6 



X 



Green Newton 



yes 





Ben Davis 13 



X 



Grimes 



++ 





Ben Davis 



X 



Hurlbert Sweet 



— 



11 



Ben Davis 13 



X 



Jonathan 



+ 





Ben Davis 8 



X 



Jonathan 



yes 





Ben Davis 14 



X 



Jonathan 



yes 





Ben Davis 6 



X 



Mcintosh 



yes 





Ben Davis 



X 



Mcintosh Red 



+++ 





Ben Davis 6 



X 



Mother 



yes 





Ben Davis 14 



X 



Newtown 



yes 





Ben Davis 



X 



. Northern Spy 



+ + 





Ben Davis 



X 



Opalescent 



++ 





Ben Davis 



X 



Rhode Island Greening 



— 



2 



Ben Davis 14 



X 



Rome 



yes 





Ben Davis 14 



X 



Spitzsnburg 



yes 





Ben Davis 



X 



St. Lawrence 



+ 





Ben Davis 14 



X 



Wagener 



yes 





Ben Davis 



X 



Wealthy 



+ + + 





Ben Davis 13 



X 



Winesap 



± 





Black Ben Davis 11 



X 



Hydes Keeper 



yes 





Black Ben Davis 11 



X 



Willow Twig 



yes 





Blenhein Orange 11 



X 



Hanwell Souring 



yes 





Blenhein Orange 11 



X 



Arkansas Black 



yes 





Blenhein Orange 11 



X 



Jonathan 



yes 





Bloornfleld 8 



X 



Delicious 



+++ 





Bloomfield 8 



X 



Oldenburg 



+ 





Bottle Greening 11 



X 



Pewaukee 



yes 





Bottle Greening 11 



X 



Charlottenthaler 



yes 





Delicious 8 



X 



Grimes 







64 



Delicious 14 



X 



Jonathan 



yes 





Duchess 



X 



Baldwin 







20 



Duchess 



X 



Mcintosh Red 







4 



Early Harvest 



X 



Crab 







7 



Early Harvest 



X 



Duchess 



+ 





Early Harvest 8 



X 



Early Ripe 



± 





Early Harvest 



X 



Hurlbert Sweet 







2 



Early Harvest 



X 



Mcintosh Red 



— 



2 



