62 POTATO DEVELOPMENT WORK IN WISCONSIN. 



sin fields to be a serious factor. In bad outbreaks, such as oc- 

 curred about ten years ago, it may, however, sweep off the en- 

 tire crop. The fungus overwinters in the interior of infected 

 tubers. Of course, if these are sufficiently diseased to show as 

 dry rot, no one would think of using them for seed. Since, 

 however, there may be cases of infection which do not show on 

 the surface, the only safe rule is to avoid the use of seed tubers 

 taken from fields which show the late blight. This disease 

 should not, however, be confused with the early blight and tip 

 burn the leaves, which are more common in "Wisconsin fields, 

 but which do not attack the tubers, hence have no importance in 

 relation to the seed trade. 



CONCLUSION 



If each Wisconsin seed potato grower will learn to recognize 

 these troubles and use precautions as an individual to keep free 

 from them, Northern Wisconsin can continue indefinitely to 

 supply potatoes of a higher degree of purity from disease than 

 any other state in the north. In order to secure the full bene- 

 fit of this condition, this Association should cooperate in the 

 plan of potato seed inspection and certification outlined by 

 Messrs. Orton and Stuart of the U. S. Department of Agricul- 

 ture. With this combination of individual and Association ef- 

 fort, I believe Wisconsin may maintain her place, unrivalled, in 

 the seed potato trade of the country. 



As this bulletin goes to press a letter has been received from 

 North Crandon in Forest County, announcing the organization 

 of the North Crandon Potato Growers Association. Thirty- 

 three charter members were enrolled. The Association will unite 

 upon round white stock and have taken steps to secure founda- 

 tion stock of the Rural New Yorker and Green Mountain varie- 

 ties. 



The officers of the Association are : A. R. Anklam President ; 

 J. D. Grandine Secy-Treasurer. 



