SUSCEPTIBILITY OF VARIETIES. 



The comparative susceptibility of varieties is an important question to 

 the prospective planter of an orchard. In an experimental orchard at Agassiz, 

 where some eight or ten varieties were planted twelve or more years ago 

 in variety rows of ten or twelve trees to the row, the only two varieties 

 which remain practically intact are the King of Tompkins and Grimes Golden. 

 Most of the trees of the other varieties have been seriously damaged or 

 entirely killed by the black-spot canker. Grimes Golden has been damaged 

 more than the King of Tompkins, but not seriously enough to convince the 

 writer that this variety could not be kept clean by proper treatment. 

 Although we were not aware of the results as obtained there until after 

 the demonstration orchards in the ('oast districts were planted this spring, 

 it bears out our belief that, in the selection of the varieties for those orchards, 

 we were obtaining varieties which were less susceptible to black-spot canker 

 than others. Some varieties which have been noticed as most ofter attacked 

 are Gravenstein, Wealthy, Baldwin, Wagner, Yellow Bellflower, Winter 

 Banana, Duchess, Yellow Transparent, and Spitzenburg. Of the varieties 

 noticed showing less damage from disease there are King of Tompkins. 

 Grimes Golden, Rome Beauty. Hyslop Crab, (all Crabs), Northern Spy. and 

 Ben Davis. This variety list is not given for the purpose of influencing 

 the intending planter against setting out any of the above varieties, but 

 more to convince him that they differ as to their susceptibility, and that 

 in selecting varieties it might be well to give this point consideration, espec- 

 ially where their merits otherwise are nearly equal. 



Blaek-Nnot canker on an ajile-lree. 



