280 DISEASES OF ECONOMIC PLANTS 



England, and thorough study by Appel in 1903 led him to 

 attribute it to the bacillus above named. American studies 



Flu. 123. — I'otato black IcK. OriEin:il. 



render it probable that this same disease is present in tliis 

 country, but to just what extent is uncertain because of the 



