854 EXPERIMENT STATION EECOKD. 



clierry leaf scorch, due to (Jnoinonia cryiftrostojiia, the occurrence of which in 

 England has been previously noted (E. S. K.. 14, p. 59). The effect of the 

 fungus on the host plant is described at length, as well as cultural charac- 

 teristics of the fungus, and it is stated that one of the conspicuous symptoms 

 of the disease is the ])ersistence of the foliage throughout the fall and winter. 

 This is due to the fact that the fungus develoi»s in the leaf and passes down 

 the leaf stalk, and that as a consequence of the changes produced the normal 

 processes of defoliation are interfered with. 



It has been usually recommended that the diseased leaves should be collected 

 and burned, but the author found by spraying experiments with Bordeaux mix- 

 ture that the fungus could be successfully controlled by such treatment. There 

 does not ap[)ear to be any evidence that the fungus gains entrance into the 

 wood, but it passes the winter in the dead leaves remaining upon the trees. 

 By the removal of these and the thorough use of Bordeaux mixture, the disease 

 can be controlled to a considerable extent. 



The cocoanut industry in Cuba, Mary T. Horne (Cuba Rev. and Bill., 5 

 il!)07), A'o. IJ. 1)1). tS-JO, floH. 2). — A popular review is given of the cocoanut 

 industry in Cuba, and attention called to the serious losses due to the bacterial 

 bud rot. This disease has been under investigation for some time, and al- 

 though no absolutely conclusive i-esults have been obtained, it is believed 

 that bacteria are its cause. The author describes some experiments for the 

 control of the disease, which consist in tlie destruction by fire of all dead or 

 hopelessly affected trees and tlie disinfection by fire of those showing an 

 attack in its early stages. The results tluis far obtained are such that it is 

 believed that the disease might be kept under control if these measures should 

 be adopted over a considerable area. 



Diseases of cocoanut trees, F. A. Stockdale (Proc. Ayr. aS'oc. Trini<l<nl and 

 Tobago, 7 [IDOl], jip. i)-ol; Trinidad Boi. Dcpt., Bui. Misc. Inform., 1907, No. 

 56, pp. 262-287').— Previously uoted (E. S. R., 18, p. 1057). 



A root rot in oranges, J. S. Jefferson (Jour. Dept. Agr. West. Aust., 15 

 (101)7), \o. J I. pp. 815, 816). — The attention of the author was directed to the 

 presence of root rot in oranges in orchards in Western Australia, and upon 

 examination it was found that practically all of the infected orange roots were 

 either touching or in innnediate proximity to rotting roots of red gum trees. 

 From the samples examined the author believes that the disease is caused by 

 a fungus which first attacks the decaying red gum roots, passing from them to 

 the orange roots. 



In a number of instances trees were saved by digging about them, cutting 

 away the diseased parts, and treating the roots with Bordeaux mixture. 



A stem disease of tea, T. Petch (Circs, and Agr. Jour. Roy. Bot. Gard. Cey- 

 lon, .'/, (1907), A'o. J{, pp. 21-30, fig. 1). — In a previous accoimt on the root dis- 

 ease of tea (E. S. R., lO, p. 67) it is stated that possibly not all the injury 

 attributed to the fungus Rosellinia could be positively demonstrated as caused 

 by that fungus. 



The present circular describes a disease that has hitherto been confused with 

 the Rosellinia and for which trenching about the trees would be futile. This 

 disease attacks the stem of the plant, and the fungus lives almost entirely in 

 the wood, the fructifications only appearing in the bark. The disease is said 

 to be due to Massaria thcicola, a technical description of which is given, and for 

 its control the author recommends vigorous pruning and covering the wounds 

 with wood tar or some other antiseptic treatment. In case of severe attacks, 

 painting the stems of infected trees with Bordeaux mixture might possibly pre- 

 vent further injury. 



