Some Important Pear Diseases. 273 



injury, this one orchard gave the following results, defoliation being 

 not very great, even on October i ; it is mainly a comparison of leaf 

 injuries : 



Variety. Number of trees. Effect. 



Bosc 1-5 Quite bad. 



Anjou 100 " 



Louise Bonne 10-25 " 



Giffard I-5 



Buffum 1-5 " 



Clairgeau 10-25 Considerable. 



Summer Doyenne 1-5 " 



Seckel 100 " 



Sheldon 10-25 " 



Bartlett 100 " 



Lawrence 10-25 " 



Flemish Beauty 10-25 Slight . 



Josephine de Malines 1-5 " 



Vicar of Winkfield 1-5 



Clapp's Favorite 10-25 " 



Reeder 1-5 Very slight. 



Souvenir du Congress 1-5 " 



Duchess 500 " 



Winter Nellis 1-5 None. 



Kieffer .... 1-5 None. 



On the University grounds the orchard of the department of horti- 

 culture was given at least one spraying during the season of '96, but 

 even here the disease was generally prevalent to slight extent. Obser- 

 vations upon this orchard and upon others indicate that among the 

 varieties more commonly cultivated, Anjou, Seckel, Bosc, Summer 

 Doyenne, and Bartlett are very generally affected to considerable 

 extent; Louise Bonne, Clairgeau, Clapp's Favorite, Flemish Beauty, 

 and others much less, falling into an intermediate and variable grade ; 

 Duchess uniformly very shghtly affected ; and Kieffer free from the 

 leaf-spot fungus. 



The leaf-blight fungus in pear orchards is apparently not very 

 abundant in this state, and instances of the confusion of the leaf-spot 

 with the leaf-blight have come to our attention. This may account for 

 the statement that the leaf- blight, although of general occurrence in 

 New York, iTiirely causes cracking of the fruit in this state. Leaf-spot 

 never affects t;lp^ fruit. Nevertheless, one cannot go amiss in the treat- 



