THE CUCURBIT WILT! CAUSE 



133 



FIG. 62. Cucumber wilt due to Bacillus tmchci^fiilus. A natural infection. 

 Photographed by the writer in 1893. 



FIG. 63. Squash wilt clue to Bacillus tracheiphilus. A natural infection. (Afnr 



Clinton.) 



FIG. 64. Muskmelon wilt due to Bacillus tracheiphilus. Result of a pure culture 



inoculation made April 15, 1896. 



