43 



By comparing tables 5 and 6, it may be seen that the 

 replies are not entirely consistant. A variety may be con- 

 sidered resistant by one grower and susceptible by another. 

 There seems to be a decided agreement of opinion among the 

 growers regarding the susceptibility of Ben Davis and its 

 allies. 



Disease Resistance . - "What varieties resist disease 

 most successfully?" This question was asked to find out to 

 what extent disease immunity and resistance are prevalent 

 among varieties. Naturally one could .not expect very defin- 

 ite answers to this question. It is also very largely a 

 matter of comparison. Of course the growers were able to 

 compare only those varieties which they had in their orchards, , 

 and in any correct interpretation of their answers this point 

 must be taken into consideration. A number of growers stat- 

 ed that they had observed no difference in varieties with 

 respect to disease resistance. Some growers noted that 

 certain varieties are comparatively free from disease, but 

 may be attacked by some particular disease. For example, 

 York is a very clean, healthy apple, but it is attacked in 

 some localities by cedar rust. Likewise, Winesap is very 

 healthy excepting its susceptibility to scab. Table 7 gives 

 a summary of the replies which the growers made to the above 

 question. 



