752 EXPERIMENT STATION RECORD. 



decay of the terminal j'oiniK loaves and the production of narrow, yellow, 

 wrinkled leaves. The bunches of fruit are also much distorted. 



Spraying with fungicides has not proved effective for the control of this 

 disease, but if the diseased plants are cut out and destroyetl by fire as soon as 

 observed, it is held under control. The disease seems to be confined chiefly to 

 the Chinese banana. 



[Panama disease of banana] (Jour. Jamaica Agr. Hoc, 18 (lOlIf), No. 11, 

 pp. .'i')0-Ji ').'>). — This is a report, with discussion,' of a special committee on 

 Panama di.sease discovered in 1U12 and now api)earing in new places on .several 

 estates in parts of Jamaica. It is s;iid to be si)read by planting suckers from 

 diseased plants, also probably through dissemination of spores by laborers on 

 tools, clothing, earth from diseased roots, etc. 



The disease is said to be controllable, when found in any given .spot, by the 

 destruction of all the plants in the Immediate neighborhood, and by drainage of 

 the flood water therefrom into pits treated with lime. In Jamaica the disease 

 has seldom reajjpeared after thorough treatment. 



[Banana disease], S. F. Ashby {Jour. Janmk-a Agr. Hoc, 18 (1914), No. 11, p. 

 451). — This is a rei)ort by the government microbiologist on disease(^l l)anana ma- 

 terial sent for examination from Glengoffe. lioot galls are described as due to a 

 Heterodera. A bud rot yielded two undetermined bacteria which closely re- 

 sembled that causing the bud rot of coconut. 



The extension of Marsonia rosae in rose culture, Chifflot (Compt. Rend. 

 Acad. Sci. [Paris], 15!) (1914), No. //. pp. .W6-.3.3S).— Reporting observations on 

 M, rosw the author states that this fungus, formerly thought to be confined to 

 the subcuticular portions of the leaves, may, in ca.se of certain rose varieties, 

 extend itself to deeper cell layers and to any aerial portion of the plant. The 

 mycelium is thought to be i>erennial and capable of transmission through 

 grafts. 



Removal of all di.seased or fallen leaves and thorough spraying with fungi- 

 cides is recommended. For this purpose Burgundy or Bordeaux mixture may 

 be employed at from 0.8 to 1 per cent strength, adding 0.05 per cent of gelatin 

 previously dissolved in liot water to augment its spreading and adherent 

 qualities. 



Influence of the medium on the development of Lophodermium nervi- 

 sequum, E. Meb (Rev. G6n. Bot., 25 his (1914)^ pp. 511-521). — Having investi- 

 gated further (E. S. R., 27, p. 854) the factors in the evolution of L. nervi- 

 sequum on fir, the author states that the conditions of the medium (including 

 not only weather, etc., but also conditions internal to the host) are very 

 influential in this connection. The fungus is thought to attack only those 

 branches whose foliage is not in full vigor. 



Improvement of living conditions and emiiloymeut of copper fungicides, it is 

 thought, may prevent serious damage fi-om this fungus, which is not con- 

 sidered as necessarily very injurious. 



Pyropoljrporus everhartii as a wound parasite, G. N. Hoffer (Proc. Ind. 

 Acad. Set., 1913, pp. 99-101, figs. 4)- — Reporting observations on P. everhartii, 

 thought to be of considerable economic importance in Indiana, the author adds 

 Quercus alba to the list of its hosts as given by Hedgcock (E. S. R., 27, p. 653). 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



The animal enemies of agricultural plants, M. Neveu-Lemaire (In Para- 

 sitologie des Plantes Agricolcs. Paris: J. Lamarrc <(• Co., 1913. pp. 261-655. 

 figs. 194)- — 111 this work the author presents a brief discussion by orders of the 



