New York Agricultural Experiment Station. 



837 



Volunteer 

 experiments. 



No volunteer experimenters reported in 

 1911, but the summarized results of 205 such 

 tests made in the seven years preceding 1911 

 are shown in the next table. These tests were made without Sta- 

 tion supervision in any way and are probably less reliable than the 

 farmers' business experiments, yet they help to show that spraying 

 potatoes is too profitable a farm operation to be neglected. 



Tablb VII. — Showing Results of Volunteer Experiments, 1904-1910. 



Average gain for seven years (205 experiments), 54.3 hu. per 

 acre. 



Potato 

 troubles 



during 

 the year. 



Over the greater part of the State the grow- 

 ing season of 1911 was very dry. Conse- 

 quently, late blight (PhytopJithora infestans)' 

 occurred very sparingly. It made its appear- 

 ance in a few localities, but came too late to 

 cause material injury to the foliage. Neither was their much 

 loss from rot although traces of it were found in a considerable' 

 number of fields in central and western New York. Early blight 

 (AUernaria solani), also, was scarce. As in 1910, the leading 

 troubles of potato foliage were flea beetle injury and tip burn. 

 Tip burn, especially, was very prevalent. 



