220 



DISEASES OF ECONOMIC PLANTS 



many states. From 50 to 100 per cent damage was reported 

 from Nebraska in 1905. The disease is discussed under 

 watermelon. 



Southern blight {Sderotium Rolfsii Sacc. in litt.). — 

 A large percentage of the cantaloupe crop in the southern- 



Fig. 101. — -Leaf spotted with downy mildew. Original. 



most states is often destroyed by this disease. It is par- 

 ticularly noticeable on fruit upon the side touching the 

 ground, first as a slight rot, followed by a white fringe of 

 fungous threads which soon surround the whole fruit. 

 Later sclerotia appear as small round bodies, dirty white 

 to dark brown. For further description and treatment, 

 see pepper. 



