DISEASES OF PLANTS. 451 



identity of tlie fnngiis wliicli is held to cause tlie bligtit of the chestnut tree. 

 The author states that so far as can be distinguished by the morphological 

 characters, Diaporthe parasitica as described by Murrill (E. S. R., 19, p. 251) 

 resembles the Italian Endothia radicalis so closely that they can not be 

 separated specifically unless it be by some peculiarity not hitherto recorded. 



A twig disease of elms, J. Eriksson (Mycol. Centhh, 1 {1912), No. 2, pp. 

 S5-Jf2, pi. 1, figs. 3). — The author describes a disease found on Ulmus nwntana, 

 U. montana exoniensis, U. campestris, and U. effusa, which usually attacks the 

 younger shoots and plants, dotting the surface with small black pustules and 

 finally killing the affected parts or plants. 



The disease is ascribed to a fungus found in connection therewith. This is 

 claimed to be new and is described under the name Exosporium ithni. Attempts 

 with artificial inoculation were successful in several instances, reproducing the 

 characteristic symptoms of the disease and killing the infected twigs or young 

 plants. As protection against this disease the author recommends careful 

 inspection of nursery stock before purchase and repeated examination of 

 suspected trees with removal and destruction by fire of all dead or visibly 

 infected twigs. 



Fungus enemies of Canada, poplar in Santena, P. Voglino (Ann. R. Accad. 

 Agr. Torino, 53 {1910), pp. 325-377, figs. J/). — Descriptions are given of 33 

 species of fungi and bacteria known to infest Canada poplar in Italy. 



Hevea rubber stumps as possible carriers of disease {Agr. News [Barbados'], 

 11 {1912), No. 262, p. i5S).— Attention is called to the statement of Stockdale 

 that imported Para rubber stumps showed the presence of fungi, and a warning 

 given against their indiscriminate introduction. Through the careless importa- 

 tion of rubber stumps it is thought probable that a number of fungi might be 

 introduce^l, among them Thyridaria tarda, llymenochwte noxia, Fomes semi- 

 tostus, and Corticium salmonicolor. 



Immortel canker, F. W. South {Agr. Neic-s [Barbados], 11 {1912), No. 26S.. 

 p. 17 Ii). — In an account of a recent visit to St. Lucia the author describes a 

 disease of immortel {Erythrina umbrosa), which has been known to exist 

 for some time in that island. The disease usually starts from a cut surface, 

 spreads rapidly, and generally kills the tree. In its early stages the bark is 

 somewhat split and covered with a thin, shiny, transparent coating, probably 

 consisting of a dried gummy secretion. Inside the bark is rotted, wet, and of a 

 reddish color. Between the wood and the bark were found numerous insects, 

 which were working almost to the advancing margin of the diseased area. As 

 the disease progresses the parenchyma of the bark is destroyed, and the bark 

 dries and falls off the trees in sheets. 



A disease of the same species of Erythrina has been reported from Ceylon 

 as due to the same fungus as that causing canker of cacao. This fungus, 

 however, has been determined as PhytopMUora faberi, a fungus which has not 

 been found to develop from diseased immortel bark in St. Lucia. 



It is believed that cutting out and burning the diseased bark, followed by an 

 application of tar, would control the disease. 



Pestalozzia hartigi, a new parasite of the silver fi.r, T. Lagerbekg {Meddei. 

 Stat. Skogsforsoksanst. {Mitt. Forstl. Vers. Anst. Schicedens) , 1911, No. 8, pp. 

 95-107, V, VII, figs. 10). — An account is given of a new disease found on young 

 firs in seedbeds and nurseries in Swe<^len. The plants are first covered witli 

 dark or black spots ; the lower portions become constricted, and the upper 

 swollen; and the twig or plant finally dies. Cultures were grown and ex- 

 amined, and the disease was attributed to a fungus, P. hartigi. 



