Tropical Fruits 



147 



brown decayed areas. In older stages, masses of salmon- 

 colored spores are visible over the decayed areas. The 

 entire fruit at length becomes rotten, wrinkled, and shrunken. 

 Algal leaf-spot {Cephaleuros virescens) is common. 



LOQUAT 



Scab (Fusicladium dendriticum (Wallr.) Fcl., var. eriobo- 

 trycB Scalia.). — In the western part of California scab is 

 reported as serious upon both fruit and leaves. 



MANGO 



Anthracnose ^^^- ^'^^ (Colletotrichum glceosporioides Penz.). — 

 This rot of the fruit, flowers, and leaves resembles bitter-rot of 

 the apple, and causes much loss in 

 the Caribbean region, in Hawaii, 

 and the Gulf states. 



OLIVE 



Knot {Pseudomonas savastanoi 

 EFS.). — Tubercles or galls upon 

 the leaves and branches, and even 

 upon the trunk of the tree, are the 

 first signs of attack. Upon the 

 leaves, the knots are always small, 

 particularly if they are numerous. 

 Upon the small twigs the knots 

 attain the size of a garden pea, 

 while upon the trunk they become 

 2-3 cm. or more in diameter and 

 finally destroy the tree. The dis- 

 ease was noticed in CaUfornia in 

 1893 and appears to be confined 

 to a very small range. Excision 

 should be practiced. 



Leaf-spot {Cydoconium oleagi- 

 num Cast). — According to Bioletti 



Fig. 78. — Olive knot. After 

 R. E. Smith. 



