342 THE NATIONAL GEOGRAPHIC MAGAZINE 



POTATO PLANT ATTACKED BY WART DISEASE 



This disease has stopped potato culture in Europe wherever it has appeared, and is now 

 established in Newfoundland, and diseased potatoes are now coming into the United States, 

 threatening to establish the| disease here. This disease, once in the soil, stops potato culture. 

 Its introduction into the United States would mean a loss of. millions of dollars annually. 



