PLATE XVII 

 Watermelons, showing the effect of inoculation with species of Diplodia: 



Fig. I. — The upper four melons were held as checks; the lower five are melons 

 nine days after having been inoculated with a culttu-e of Diplodia sp. which had been 

 isolated from a decaying watermelon obtained from a freight car at Washington, D. C. 



Fig. 2. — A watermelon nine days after having been inoculated with a culture of 

 Diplodia tuhericola E. and E. 



