262 



DISEASES OF ECONOMIC PLANTS 



This disease was first described by Rolfs ^ from Florida 

 and has since been found in many Southern States upon a 

 wide range of plants. 



The application of a clear, preventive fungicide, such as 



ammoniacal copper 

 carbonate, to the 

 ground at the base 

 of the plant, and 

 where any part 

 touches the ground, 

 so that it can soak 

 into the ground near 

 by and cover the 

 stem itself, has. 

 proved beneficial. 

 The first application 

 should be made at 

 the earliest sign of 

 the blight, or still 

 better, in anticipa- 

 tion of it, and should 

 be followed by other 

 applications at in- 

 tervals of two to 

 three weeks. Bor- 

 deaux mixture is not suitable, since the effective part of it 

 is filtered out by the soil. 



Anthracnose (Glceosporium piper alum Ell. & Ev.). — 

 Soft, circular, pale, sunken spots upon the fruit accom- 

 panied by small, ruptured spots in the skin, through which 

 the pink spore masses protrude, indicate this disease. 



1 Rolfs, p. H., Fla. Agr. Exp. Sta. Rpt., 1893. 



Fig. 118. — Pepper plant showing fungus, Sclero- 

 tium Rolfsii Sacc. After Fulton. 



