150 EXPERIMENT STATION RECORD. 



found tbat the cro\Ams and larger roots were apparently healthy in every case. 

 Various reputed causes for the disease were investigated, and collections of soils 

 and leaves were made for analysis, which showed that the soils were poor in 

 plant food and that the leaves were decidedly deficient in lime, sulphates, and 

 phosphoric acid. Some fertilizer experiments have been planned in VN'hich the 

 trees are to be given a generous supply of superphosphate and sulphate of pot- 

 ash with the lio]io that the trouble m;iy l)e overcome. 



CofEee leaf disease in the East Africa Protectorate (Gard. Chron., 3. ser., 

 Jf5 (1900), Vo. 1162, p. 21Ji). — ^Attention is called to the destructive nature of 

 the coffee leaf disease (Hemileia vastatrix) wherever it occurs. According to 

 the author, the exports of coffee from Ceylon have decreased from about $15,- 

 000,000 in ISSO to $125,000 at the present time, due almost exclusively to attacks 

 of the fungus. 



The Ilemileia is known to occur in most of the coffee-growing districts of 

 the East, being present in Ceylon, India, Java. Sumatra, Singapore, the Philip- 

 pines, Samoa, Mauritius, and Madagascar, and in Natal, German East Africa, 

 and other places on the mainland of Africa. 



In order to prevent the introduction of the fungus into British East Africa, 

 oflicial action has recently been taken prohibiting the importation of coffee 

 plants from any region where the fungus is suspected as being present. 



The resistance of CofEea congensis to Hemileia vastatrix, J. Dybowski 

 (Agr. Prat. Pays Cliaitds, 9 {1909), No. 71, pp. 159, J6V?).— Attention is called to 

 the fact that plants of C. congensis have remained resistant to Hemileia for a 

 number of years when adjacent trees of C. arahicu have been utterly destroyed. 

 The author claims that 7 years' observations have definitely shown the resist- 

 ance of this variety to the attacks of Hemileia. and he further states that the 

 quality of the coffee i.s in no way inferior to that of the Arabian variety. 



The fungus diseases of coconuts in the West Indies, F. A. Stockdale {West 

 Indian Bui., 9 {1909), Xo. //, pp. 361-381). — Descriptions are given of a root dis- 

 ease due to Botryodiplodia. a leaf disease caused by Pcstalozzia palmarum, and 

 the bud-rot disease of bacterial origin. The occurrence of these cjiseases through- 

 out the "West Indies is traced and suggestions are given for their control. 



The Diplodia disease of the coconut palm, A. Fredholm (Proc. Agr. Soc. 

 Trinidad and Tohago, 9 {1909), Xo. 3, pp. l'>9-n2, pis. 6). — A descripticm is 

 given of a disease of the coconut palm which the author claims is caused by 

 combined attacks of a fungus and bacteria. The fungus is held to be the cause 

 of the disease and it is believed to be the same as that descril)ed under the 

 names Diplodia, Botryodiplodia, and Lasiodiplodia. It is thought that it may 

 also prove identical with Diplodia epicocos, which has been described as occur- 

 ring on the coconut. 



The nature of the disease and its manner of spreading are described. As the 

 palm has but one growing point, the bud, if this is destroyed there is no possi- 

 bility of saving the trees. For the prevention of the disease, sanitary precau- 

 tions and cultivation are recommended. 



The fung-i of Hevea brasiliensis, T. Petch {Ztschr. Pflanzcnkranlc, 18 

 {1908), No. 2, pp. 81-92). — Notes are given on the parasitic fungi known to 

 attack the leaves, stems, and roots of Para rubber trees, about 30 species of 

 fungi being mentioned. Attention is called to the fact that a number of the 

 more destructive species have other economic plants, such as coffee, tea, cacao, 

 and palms, as their hosts, and in making plantations this fact should be taken 

 into consideration. 



Spraying' for fungus pests, G. Massee {Jour. Roy. Hort. Soc. [London], 3.'f 

 {1909), No. 3, pp. 305-312, figs. 2).— This is a paper presented at a conference 



