MANGO AVOCADO 137 



MANGO 



Bloom Blight. This disease is due to Gloeosporium 

 mangiferae, which attacks the opening blossoms, 

 causing them to turn black, dry up, and fall. The 

 young shoots may also wither and die. This disease is 

 said to be quite severe in Hawaii. It can be controlled 

 by two applications of Bordeaux at intervals of two 

 weeks. 



A species of Lasiodiplodia, which was apparently L. 

 tubericola, E. & E., has been found on the fruits of the 

 mango (Mangifera indica) in the Washington, B.C., 

 U.S.A., market. The fruit was supposed to have come 

 from Florida, but no definite information was obtained. 



Black Blight. This is not a true disease, but a case 

 of where a fungus Capnodium mangiferum, 1 Cooke 

 and Broome, growing on the secretions of plant lice, 

 produces a mould so dense that it interferes with the 

 proper physiological functions of the plant. If possible, 

 the plant lice should be kept in check. One of the most 

 satisfactory remedies is the Bordeaux-resin spray mixture. 



Corticium javanicum, Zimm., has been reported on 

 the mango in Java. 



Lasiodiplodia tubericola, E. T. E. , is said to cause a 

 disease of the fruits in San Domingo. 



AVOCADO 



Anthracnose. This disease is due to Colletotriclium 

 yloeosporioides, Penz., which also attacks the citrus 

 fruits (see page 116). It causes a heavy loss of foliage, 

 and consequently weakens the tree. It also attacks the 

 fruit, causing a complete loss if the fruit is young, and 

 spotting and cracking if the fruit is near maturity at 

 the time of the infection. 



A disease supposed to be due to a Gloeosporium 

 attacks the leaves of the avocado in Hawaii, causing 

 them to become a rusty brown and fall. It also attacks 

 the flowers, twigs, and branches, causing a dieback, 



1 Syn. Dimerosporium inangiferum, Cooke. 



