TROPICAL FRUITS 191 



Infected fruit should be gathered and destroyed and 

 the bushes should be given a dormant spray and two or 

 more applications of Bordeaux mixture when in foliage. 



Rust ( Uredo Fid Cast) . — This rust does considerable 

 damage to the fig crop, causing premature faUing of leaves 

 and thus removing a source of nourishment for the 

 development of the fruit. The rust appears as brown 

 spots upon the leaf, which can easily be seen with the aid 

 of a lens. 



Root tot (Dematophora necatrix Hartig). — Attack upon 

 the roots of the fig at any period of growth, a sudden loss 

 of leaf, and premature death characterize this disease. 



The one treatment is to remove the diseased bushes and 

 thoroughly stir and dry the soil where the disease occurred. 

 See grape. 



Leaf blight (Cercospora Bolleana (Thuem.) Speg.). — 

 This disease has been noted in the United States, though 

 ])ut slight attention has been given it. It causes injury 

 similar to that of rust. 



Texas root rot. See cotton. 



Yellow rust (Fusarium roseum Link). — This disease 

 attacks the leaves, causing yellowish spots which fall away, 

 giving the leaf a ragged appearance. 



GUAVA 



Ripe rot (Glomerella psidii (G. Del.) Sheldon). — This 

 disease was described from greenhouse material collected 

 at Washington, D.C., and afterward it was reported from 

 Florida and California. The affected fruit shows circular 

 brown decayed areas. In the older stages of the disease 

 masses of sabnon-colored spores are visible over the decayed 



