VI 



COFFEE 167 



reported for this disease, but it can doubtless be held in 

 check to some extent by the burning of diseased parts 

 and the use of Bordeaux mixture. 



Capnodium cojfeae, 1 Pat., in Martinique, Venezuela, 

 and Ecuador, and C. braziliense in Puttem, Brazil, are 

 somewhat similar in their general appearance to P. 

 koleroga, but are not so severe. As stated in other 

 connections the Capnodiums are not parasitic on the 

 plants but live saprophytically on the excretions of 

 insects. 



Stem Disease. This disease is due to Necator 

 decretus, Massee, which is one of the imperfect fungi. 

 It is an internal parasite, which bursts through the 

 epidermus of the young shoots, producing minute eye- 

 like reddish or orange-coloured spots, which soon become 

 gelatinous. The spores are produced in these gelatinous 

 spots. The disease usually starts at the tips of the 

 shoots and works downward. It has been reported from 

 Singapore, Malacca, and the Straits Settlements. The 

 only satisfactory remedy is to prune and burn the 

 diseased parts. It also attacks the tea. 



Another stem disease, which also attacks the fruit 

 is due to Corticium javanicum, Zimm. It is a serious 

 disease in the East Indies and Java. This fungus also 

 attacks tea, cacao, and the Para and Castilloa rubber 

 plants (see page 64). 



Another stem disease has been reported from Jamaica, 

 Natal, and Java. It is a bark canker and is said to be 

 caused by Rostrella cqffeae. Although widely dis- 

 tributed it is not a serious pest. It causes the leaves 

 to wilt and become yellow, the young bark to become 

 brown' and the tissues brown or black. It is a wound 

 parasite and is more severe on the young than on the 

 old growths. It travels in both directions from the 

 point of attack. All diseased parts should be cut and 

 burned and the wounds painted to prevent new 

 infections. 



Another bark canker of the stems is caused by 



1 Triposporium Garrneri. 



