RUBBER ( HEVEA j DISEASES 119 
RidleYj H. N. — Continued. 
1906. A fungus attacking roots of Para rubber. In Agr. Bui. Straits and Fed. 
Malay States, v. 5, p. 64-65. 
Fungus can not be identified, as no sporopbores have been found. 
1906. Para rubber leaf fungus. In Agr. Bui. Straits and Fed. Malay States, v. 5, 
p. 68. 
Petcb sends a leaf fungus which he is about to describe under the 
name of Helminthosporium heveae. It appears to be identical with 
the fungus described in the bulletins on several occasions as attack- 
ing young leaves. 
1907. Abnormalities in the stem of Hevea. In Agr. Bui. Straits and Fed. Malay 
States, v. 6, p. 157-160. illus. 
Burs and wind twist. Includes a letter from P. J. Burgess on bur 
formation. Summary in Trop. Agr.. v. 29 (sup.), p. 60, 1907; also 
in Planters' Chron., v. 2, p. 244-245, 1907. 
1908. Some diseases of rubber plants. In Agr. Bui. Fed. Malay States, v. 7, p. 439- 
443. 
Review of Bernard's article in Bui. Dept. Agr. Ind. Xeerland, no. 12, 
pt III. 1907. 
1909. Another fungus parasite on rubber. In Agr. Bui. Straits and Fed. Malay 
States, v. 8, p. 312. 
HymenocJiaete noxia. 
1909. A new fungus pest on Para rubber. In Agr. Bui. Straits and Fed. Malay 
States, v. 8, p. 310-312. Also in Trop. Agr., v. 33, p. 183-184, 1909. 
1909. The black Hevea fungus. In Agr. Bui. Straits and Fed. Malay States, v. 8, 
p. 521, 570-571. 
The fungus proves to be an undescribed species of Diplodia and will 
be described as D. rapax. 
1910. Another Para rubber fungus. In Agr. Bui. Straits and Fed. Malay States, 
v. 9, p. 216-218. Also in Trop. Agr., v. 35, p. 77-7>, 1910. 
Eutypa oaulivora, probably a true parasite, only comes to surface to 
produce fruit when host is dead. 
1910. Corticium javanicum in Borneo. In Agr. Bui. Straits and Fed. Malay States, 
v. 9, p. 59-60. 
Describes an attack of pink disease on an estate in Sarawak. 
1910. Eutypa caulivora. In Agr. Bui. Straits and Fed. Malay States, v. 9, p. 460. 
Quotes note by Massee in Kew, Roy. Bot. Gard. Bui. no. 7, 1910. 
1910. Fomes semitostus. In Planters' Chron., v. 5, p. 435-437. 
Lecture delivered in Singapore. August 20, 1910. Reprinted from 
Singapore Free Press, August 22, 1910. 
1910. Progress in rubber cultivation in 1909. In Agr. Bui. Straits and Fed. Malay 
States, v. 9, p. 130-133. 
Abstract of and comment on A retrospect of 1909, in India-Rubber 
Jour., v. 39, p. 39-53, 1910. Mentions two new diseases, Diplodia 
rapax and Hymenochaete. 
1910. Rubber fungi. In Agr. Bui. Straits and Fed. Malay States, v. 9, p. 380-384. 
Lecture at Agri-horticultural show, August, 1910. Discusses Fomes 
semitostus and Diplodia. 
1910. Rubber notes. In Agr. Bui. Straits and Fed. Malay States, v. 9, p. 174-175. 
Mentions Diplodia rapax, which was probably conveyed from Singa- 
pore to the Gold Coast on stumps. 
1910. Two Para rubber fungi. In Agr. Bui. Straits and Fed. Malay States, v. 9, 
p. 461-463. 
Hymenochaete noxia and Sphaerostilbe repens. Quotes Fetch's arti- 
cles in Circs, and Agr. Jour. Roy. Bot. Gard. Ceylon, v. 5, 1910, with 
comments on conditions on the Malay Peninsula. 
1911. The chief diseases of Para rubber in Malaya and Ceylon. In Agr. Bui. Straits 
and Fed. Malay States-, v. 10, p. 141-14::. 
Review of Vernet. Sur les principales maladies de ITIevea dans la 
Peninsule Malaise, a Java, et a Ceylon. Discusses Fomt s semitostus 
and Corticium javanicum and lists 16 other diseases. Ridley dis- 
agrees with Vernet's conclusions on Fomes. 
1911. Eutypa as a parasite. In Agr. Bui. Straits and Fed. Malay States, v. 10. p. 6. 
Previously considered a saprophyte, Futypa cauliiora now appears 
to be a parasite. 
1911. Hevea disease in Ceylon. In Agr. Bui. Straits and Fed. Malay States, v. 
10, p. 70-71. 
Phytophthora faberi attacks both cacao and Para rubber. Diseased 
bark reddish purple, often with a well-defined black border, and in 
advanced cases exuding a purple-brown liquid when cracked. 
and Derry, R. 
1910. Third report on experimental tapping of Para rubber trees in the Botanical 
Gardens, Singapore — continued. Pests. In Agr. Bui. Straits and Fed. 
Malay States, v. 9, p. 289-ii'.»7. 
Fomes semitostus, Diplodia rapax, Eutypa caulivora- 
RlXGOET. 
1923. La culture de 1' Hevea a la station agricole de Yangambi Gazi (, Province 
Orientale) durant l'exercise 1921. In Bui. Agr. Congo Belg., tome 14, 
p. 5-38. 
Accidents et maladies, p. 8-9. 
