1897.] 



PUBLIC DOCUMENT — Xo. 33. 



23 



of blossoming, etc. All varieties suffered somewhat from 

 early blight (^Macrosporimn solani). This was first dis- 

 covered on 1 variety on July 18. By the 22d it could 

 be detected on 26 other varieties, and by August 3 all 

 except 1 were atfected. As early as August 8 the vines 

 of 17 varieties were entirely dead. Between the 8th and 

 20th the vines of 26 other varieties died, while by August 

 29 all were dead. 



An attempt to prevent this blight by repeated applica- 

 tions of "Fungiroid" was an entire failure. It will be 

 noticed that considerable differences in degree of suscep- 

 tibility to "blight" showed themselves. Until the varie- 

 ties have been further tested, however, it is not deemed 

 advisable to publish the details. 



The crop was harvested in part on September 10-12, and 

 the balance September 24-25. There was no rot, and the 

 tubers were for the most part smooth and handsome. 



The yield has been in every case corrected to 207 hills or 

 sets, so that the results are strictly comparable. The area 

 occupied by this number of hills is almost exactly one- 

 seventieth part of an acre ; so that, to bring out the signifi- 

 cance of the diflerences more clearly, I have multiplied the 

 results by seventy, and converted into bushels, thus showing 

 the rate per acre yielded by the different sorts. 



The varieties are reported in alphabetical order, and for 

 each the tubers are divided into the customary classes, viz., 

 merchantable and small. 



Varieties of Potatoes, Yield per Acre (Bushels). 



