TROPICAL FRUITS 

 AVOCADO 



Anthracnose {Colletotrichum gloeosporioides Penz.). — At- 

 tack upon the leaves eventually causes defoliation. Early 

 infection of the fruit results in its complete loss. If the 

 fruit is not attacked until late, it may remain upon the 

 tree, but becomes brown spotted and finally cracked. On 

 both leaves and fruit anthracnose can be controlled by the 

 use of Bordeaux mixture. A rot of the tree trunk is caused 

 by Pythiacystis, and a leaf-spot by Mycosphaerella. ^^^ 



BANANA AND PLANTAINS 



Wilts ^^^' ■''^^ bacterial and fusarial, are of wide distribution. 

 One of these is said to have caused the abandonment of 

 nearly 20,000 acres of bananas in Panama. 



Anthracnose (Gloeosporium musarum C. & M.) frequently 

 develops on ripe fruit in the market, but really does but little 

 injury. 



CACAO '«! 



This important crop is subject to numerous destructive 

 diseases , the most serious of which are : Canker and Pod 

 black-rot, due to Phytophthora; Die-back due to Diplodia; 

 Pink-disease (Cortidum) which kills even large branches, 

 and Witches-broom {Colletotrichum). Other cankers are 

 caused by Nectrias. 



CITRUS FRXnTS ^^^ 



Brown-rot ^-'^ {Pythiacystis dtrophthora S. & S.). — This 

 disease has caused a very considerable loss, 30 per cent in 

 some cases, in California but the real origin of the trouble 

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