POTATO DEVELOPMENT WORK IN WISCONSIN. 59 



POTATO DISEASES IN RELATION TO THE 

 WISCONSIN SEED TRADE. 



BY L. R. JONES 

 Professor of Plant Pathology, University of Wisconsin. 



Professor Jones was born and raised on a farm in Fond du Lac 

 County, Wisconsin. In 1889 he went to Vermont and remained 

 there in charge of the Department of Botany, until 1910 when he 

 resigned to take charge of the Department of Plant Pathology in 

 the University of Wisconsin. 



Prof. Jones, relations to the 

 study of plant diseases has kept 

 him in close touch with potato 

 disease conditions in this coun- 

 try and in Europe. He has 

 had the advantage of observa- 

 tion and study in both countries 

 in relation to these problems. 

 At this time, when potato dis- 

 ease dissemination has given 

 rise to important economic and 

 interstate relations, the Wis- 

 consin Potato Growers' Asso- 

 ciation is fortunate in having 

 the constant co-operation and 

 counsel of Professor Jones. 



In growing potatoes for 

 table stoek, we are principally 

 concerned with those diseases 

 which reduce the yield. These 

 are the leaf diseases tip ' 



Im-pTi n-ndV Mii/1 l<if<> KlirrKf Professor of Plant Pathology, Univer- 



ouin, eailv and late blight. sity of Wisconsin. 



For the seed trade we are 



concerned rather with the tuber disease. This is not merely 



*A chart with three color reproductions illustrating the tuber diseases of the 

 potato is now in preparation under the direction of Prof. .Tones. This chart 

 will be issued by the I Department of Plant Pathology of the I'niversity clnr* 

 ing the fall of 1JM4 and Avill be available to Wisconsin potato growers, 



