320 The Spraying of Plants. 



equal parts of sulphur and lime to every fifty feet of drill has 

 been recommended as a preventive. 



INSECT ENEMIES. 



Maggot (Phorbia Ceparum, Meigen). Description. This in- 

 sect closely resembles the Cabbage Root-maggot in appear- 

 ance, and the methods of treatment are practically the same for 

 the two insects. See under CABBAGE. 



FIG. 62. Orange scab. 



ORANGE. 

 FUNGOUS DISEASES. 



Scab (Cladosporium sp.). Description. Orange leaves 

 affected with the scab first show warty-like elevations, mostly 

 on the under surface of the leaves (Fig. 62). These excrescences 

 also appear upon the young shoots. They are at first light-col- 

 ored, but later the tops turn nearly black. Growing leaves and 

 shoots are distorted by the parasite, and they finally become 

 yellow and worthless. 



