THE CORX SMUT 



203 



When one of these spores comes in contact with a 

 drop of water it soon germinates by sending ont a little 

 tube, which has the power of developiog certain second- 

 ary spores, called sporidia. The sporidia themselves, 

 have the power of germinating, under favorable condi- 

 tions, and in a liquid containing sufficient organic mat- 



FIG. 84. I'AKT OF SMUTTKI) EAR OF COJJN, 



ter for their nourishment (manure water, for example), 

 they can continue growing and multiplying for an indef- 

 inite period. It is believed, by some authors, that these 

 sporidia may develop in the barnyard, from the spores 

 which find their way to the manure pile, and be carried 



