F. T. Brooks and A. Sharples 59 



Necator decretus by Massee (8), and in 1901 Zimmermann (17) reported 

 the same fungus on coffee in Java and pointed out that it was generally 

 associated with Cortidum javanicum, not only on coffee but also on tea 

 and other hosts. 



Between 1904 and 1909 the fungus was reported under different 

 names on rubber in North Borneo (12), Malaya (6, 13, II), Ceylon (9), 

 and Southern India (1). More recently it has been found on rubber in 

 Sumatra (10) and Burmah (4). Cortidum salmonicolor has been found 

 on other hosts in the Cameroons (5) and in the Caucasus (15). In the 

 West Indies a pink fungus on cacao has been referred to Cortidum 

 lilacofuscum, which may possibly be identical with Cortidum salmoni- 

 color. 



In 1912 Rant (10) published an account of an investigation of 

 Cortidum salmonicolor with special reference to cinchona, the most 

 important result of which was to establish the identity of the Cortidum 

 and Necator decretus, these being shown to be two stages of one and the 

 same fungus. 



Cortidum salmonicolor is an omnivorous fungus and Rant mentions 

 that it has been found on no less than 141 species of plants belonging to 

 104 genera and many different families. The disease has been found 

 on Gymnosperms as well as on Dicotyledons, but no record has yet 

 been made of it on Monocotyledons. Rant (10) states he has seen 

 the fungus growing on the epiphytic fern Drymoglossum heterophyllum 

 without apparently causing harm. 



In Malaya, Cortidum salmonicolor has been found recently on Para 

 rubber, cocoa, Coffea robusta, Gardenia sp., Hibiscus sp., camphor 

 (Cinnamomum camphora), Cassia sp., horse mango (Mangifera foetida), 

 Lansium domesticum, lime, durian (Durio zibethinus), jak (Artocarpus 

 integrifolia), Averrhoa sp., mango (Mangifera indica), Tephrosia HooJc- 

 eriana, Indigofera arrecta, and Clithoria cajanifolia. The number of 

 fruit trees in this list is noteworthy, but the fungus is not often found 

 on them. 



In other tropical countries the fungus is of economic importance on 

 other plants besides rubber. In Java, coffee and cinchona are seriously 

 affected by it and in Ceylon the fungus causes a serious disease of tea. 



Cortidum salmonicolor is probably native in most of the countries 

 in which it has been recorded. Many of the plants mentioned by 

 Rant (10) as having been affected by it are native to Java and some of 

 the plants on which the fungus has been found in Malaya are also 

 indigenous. Anstead (1) states that the fungus is present on jungle 



