34 



.DISEASE RESISTANCE OF POTATOES. 



hundred potato specialists in the United States and Canada" asking 

 their opinions and the basis for them. There was a surprising lack 

 of agreement upon any one v^ariety as being especially disease resist- 

 ant. The replies indicate several things: (1) That ver}^ few American 

 potato specialists have up to the present time given careful attention 

 to this question; (2) that there are few varieties in conmion use which 

 have preeminent worth as disease resisters; and (3) that in so large a 

 geographical area local conditions affecting culture and disease are so 

 widely variant as to prevent close comparisons or broad generaliza- 

 tions. No less than 38 varieties were commended as showing resist- 

 ance to blight or rot. Of these, 26 were commended only once, while 

 the other 12 were favorably spoken of b}^ two or more persons. Still 

 other varieties were mentioned, but not with sufficient positiveness to 

 entitle them to a place in the following list. Those named more than 

 once, with the locality in which they were indorsed, are as follows: 



Table III. — The bed varieties of potatoes in the United States and Canada, as reported by 

 various experiment station officers and potato specialists. 



Variety. 



Dakota Red 



Irish Cobbler 



Green Mountain . . . 



Doe's Pride 



Norcross 



White Beauty 



Professor Maercker 



Ionia Seedling 



Quick Lunch 



Rustproof 



Sir Walter Raleigh . 

 Vermont Gold Coin 



Number 

 of in- 

 dorse- 

 ments. 



Localities in which commended. 



Canada (4): Maine (3); Massachusetts; 

 Michigan; New York. 



New York (2); Maine; Ohio; Rhode 

 Island. 



Maine (2); Massachusetts (2); Ver- 

 mont. 



Maine (2); Michigan. 



Maine; New York; Vermont. 



Maine; Minnesota. 



Canada; Rhode Island. 



New York. 



Pennsylvania; Vermont. 



Vermont. 



Minnesota; New York. 



Pennsylvania; New York. 



The following varieties were mentioned once each, the commenda- 

 tion coming from the locality mentioned in parentheses: American 

 Wonder (Minnesota); Babl)itt (Maine); Bonanza (New York); Boss 

 (Vermont); Buffalo (Maine); Burbank (New York); Cambridge Russet 

 (New York); Carmen No. 3 (Ohio); Clarke's Pride (Maine); Clay Rose 

 (Minnesota); Crines Lightning (New Jerse}'); Delaware (Minnesota); 

 P^normous (New York); Gem of Aroostook (Rhode Island); Gloria 

 (Rhode Island); Harris Snowball (New York); Holborn Abundance 

 (Canada); Imperial Mills Prize (Maine); Keeper (New Hampshire); 



« The writer is indebted to the following experiment station officers for helpful 

 advice: Professors Macoun, Canada; Woods, Maine; Rane, New Hampshire; Stuart, 

 Vermont; Brooks, Massachusetts; Wheeler and Adams, Rhode Island; Fraser and 

 Stewart, New York; Buckhout, Pennsylvania; Halsted, New Jersey; Selby, Ohio; 

 Taft, Michigan; and Green, Minnesota. Much information has been secured from 

 the replies of leading i)otato growers and seed dealers. It is regretted that it is 

 impracticable to give detailed credit to these correspondents. 



