Pepper Diseases 



171 



Little is known about the causative fungus. It is 

 probable that the disease has the same origin as 

 the blossom end rot of tomatoes, and that the Macro- 

 sporium fungus is only secondary. Spraying with 

 Bordeaux mixture is recommended. 



Leaf Spot 



Caused by Cercospora capsisi H. and W. 



This disease is characterized by roundish raised 

 spots on the upper surface, at first brown, later be- 

 coming gray brown. They are limited by a dark 

 zone, beyond which the leaf tissue is pale and chlor- 

 otic. Where the spots are abundant the leaves turn 

 yellow, wilt, and fall off prematurely. 



The conidiophores of the fungus are formed in 

 clusters on both surfaces of the spots. The conidia 

 are dilutely brown, clavate, and several septate. As 

 a control measure spraying with Bordeaux mixture 

 is recommended. 



Southern Blight 



Caused by Sclerotium rolfsii Sacc. 



Symptoms, Affected plants show a drooping of 

 the young leaves at the tips of the branches. At 

 night the plant seems to recover and it appears nor- 

 mal the next morning. This recovery, however, is 

 only temporary. Wilting generally follows, and 

 after three or four days the leaves become completely 

 yellow, wilt, droop, and die. In another day, the 



