1916] DISEASES OF PLANTS. 251 



on E. parasitica, the use of proportions from 0.2 per cent up retards germina- 

 tion, and the use of those from 0.4 per cent upward results injuriously to the 

 growth of the fungus. 



Diseases and injuries of Hevea brasiliensis in Java, A. A, L. Rutgees and 

 K. W. Dammerman (Dept. Landb., Nijv. en Haiidel [Dutch East Indies^, Meded. 

 Lab. Plantenziekten, No. 10 (1914), pp. 45, pis. 12, fig. i).— This is a somewhat 

 systematic discussion of local insect enemies, diseases, and abnormalities of 

 H. brasiliensis classified according to portion of the plant attacked, with ref- 

 erences under the several sections to related literature. Parasitic fungi named 

 in connection with diseases include, on the roots, Forties semitostxis, Hymeno- 

 cha-te noxia, and Sphoerostilbe repens; on the branches, Corticium salmonieolor 

 (C. javanicum) , Thyridariu tarda, OlOBOsporium alborubrum, and PhyUosticta 

 ramicola; on the trunk, Phytophthora faberi; and on the leaves, PhyUosticta 

 hevew and Pestalozzia palmarum. Injurious changes in the latex and prepared 

 rubber are discussed, also such abnormalities as excrescences and fasciations. 



The pseudosclerotia of Lentinus similis and L, infundibu.lif ormis, T. Petch 

 (Ann. Roy. Bot. Gard. Peradeniya, 6 {1915), No. 1, pp. 1-18, pi. 1). — Reviewing 

 related contributions and describing a study of sclerotia in Lentinus found on 

 stumps of Hevea brasiliensis, the author states that in addition to species pos- 

 sessing a true sclerotium, there appear to exist others whose mycelium merely 

 binds together the earth in a large compact mass, while L. similis and L. 

 infundibulif ormis exhibit a third type in which the skeleton of the pseudo- 

 sclerotium consists of the wood of the host plant. It is considered as still an 

 open question whether these types are definitely associated with different 

 species of Lentinus or are merely stages which may be assumed by the scle- 

 rotium in any given species. 



Leaf-spot disease of lime, E. S. Salmon and H. Wormald {Gard. Chron., 3. 

 ser., 58 {1915), No. 1500, pp. 193, 194, fiffs. 2).— It is stated that a leaf and shoot 

 disease of lime or linden trees near Maidstone in Kent has been identified as 

 Glwosporinm tiliwcoltan, reported on the Continent by Laubert in 1904 (E. S. R., 

 16, p. 988), but not previously recorded in England. The disease and the habits 

 of the fungus are described. 



Infection studies with Melampsora on Japanese willows, T. Matsumoto 

 {Trans. Sapporo Nat. Hist. Sac, 6 {1915), No. 1, pp. 22-37, figs. 5).— Giving an 

 account of morphological, systematic, and infection studies, regarded as being 

 of a preliminary character, on several species of Melampsora, the author ex- 

 presses his belief that a connection exists between the Melampsora on Popnius 

 spp. and the creoma spores on Chelidoninm majus, although this could not be 

 definitely settled with the material obtained. It is thought probable that a 

 disease of Salix caprea in Japan may be due to the rust fungus which has been 

 designated as M. larici-caprcearnm. 



Technical descriptions are given of the new species M. yesoensis on S. jes- 

 soensis (cseoma stage on Corydalis ambigua), M. larici-miyabeana on S. mdya- 

 beana (cseoma on Larix europcea and L. leptolepis), and M. larici-opaca on 

 S. opaca (caeoma on L. europcea and L. leptolepis) . 



The recent outbreaks of white pine blister rust, P. Spaulding {Jour. Wash. 

 Acad. Sci., 6 {1916), No. 4, pp. 102, 103). — Giving a brief account of white pine 

 bli-ster rust in this country, the author states that in the years 1909 to 1914 

 there were 11 outbreaks of the disease ; that is, cases where it escaped from 

 diseased pines and attacked currant or gooseberry. Owing to favorable weather 

 condition^' during 1915, it spread very readily and for relatively long distances. 

 Twelve outbreaks were noted, the extent of attack varying from a few bushes 

 to a single area of from 400 to 500 square miles. It is stated that all of the 



