PLANT BACTERIA, VOL. 2. 



PLATE 16. 



Wilt of Cucurbits. 



Hothouse-cucumbers inoculated with Bacillus tracheiphilus Sept. 1, 1894, by direct infection from cut surface of 

 diseased stems brought in from a field, bacteria being introduced by needle-pricks on blade of one leaf. 



(1) Plant No. 4, inoculated with white sticky ooze from stem of cucumber. Photographed thirteenth day after inoculation j blades 



shriveled, 3 wilting, and 4 normal. 



(2) Plant No. 8, inoculated with white sticky ooze from a squash-stem. Photographed on thirteenth day when all the leaves had shriveled. 

 Photographs about .' natural size. 



