DISEASES OF PLANTS. 647 



Rubber cultivation in Uganda, F. Kaye {India Rubber Jour., n. scr., 39 

 U9J0), ^o. J, pp. 30',, 306, 30i), 310, figs. J).— A brief account of rubber cultiva- 

 tion in Uganda, including data on the growth of, and tapping experiments with, 

 a number of rubber trees at the Entebbe Botanical Garden. 



DISEASES OF PLANTS. 



Recent investig-ations on plant diseases, F. C. Stewart (West. A'. Y. Hort. 

 Sac. I'roc, ■')-', {IDO'J), pp. 77-Sl). — An outline is presented of some recent in- 

 vestigations that have been carried on for the prevention of plant diseases, and 

 notes are given on the value of self-boiled lime-sulphur mixture as a fungicide, 

 a stock solution of lime-sulphur for the prevention of apple scab, the arsenical 

 poisoning of fruit trees, and a number of diseases, among them ajiple leaf 

 spot, crown gall, apple rots in cold storage, and black rot of grapes. 



A list of parasitic fung'i from the Swedish provinces of Soderman and 

 Bohun, (i. Lagekheim il^r rii.sk Bot. Tidskr.. 3 {IHO'J}, Xo. I. pp. IS-'iO, fi(j. 

 1). — This list includes about 1(»U species of plant parasites, two of which are 

 described as new, namely, Chry.somijja ramischiu' on leaves of Pyrohi sccunda 

 and UroDJi/rcs flcctcns on Trifoiiuni rcpcu.s. 



What is Aspergillus glaucus? L. Mangin {Ann, Sci. Nat. Bot., 9. ser., 10 

 {1909), No. .'i-6, pp. 303-371, figs. 15). — A critical and experimental study has 

 been made of the various molds which are generally grouped under the name 

 Aspergillus ghiucus. The author finds that with the exception of Eurotium 

 amstelodami n. sp., the ascospore form of the mold, all the forms can be 

 grouped together in one series, which should be united and maintained under 

 the name of A. glaueus. This series would naturally include .1. oryza; and A. 

 flarus, but they may be readily distinguished from the typical form by the 

 shaiie and size of their conidia. E. (unstelodatni mav be recognized from all 

 other forms by the smallness of the conidia. 



The wintering over of plant parasites, K. von Tubeuf {Naturw. ZtseJir. 

 Forst u. Landtc, 8 {1910), No. 1, pp. 56'-oS).— The author reports Cuscuta win- 

 tering over on the green parts of winter plants, the apple mildew in the buds 

 of apple trees, and a rust {Pueeinio lunlvaee(irum) in the rhizomes of its host. 



A method of infection experiments w^ith green plants, E. W. Schmidt 

 {Cenlbl. Ball, [e1e.^, 2. AM., 25 {1909), No. l-',-lS, pp. J,26-'i30, fiffs. 2).— The 

 apparatus consists of a glass cylinder open at both ends and standing in a glass 

 cup or vessel, in the bottom of which is a layer of sand and in the top a plug 

 of cotton. The i)lant to be infected is placed inside the glass cylinder and the 

 plug replaced. It is claimed that the plant can thus obtain the proper amount 

 of moisture and air and yet I)e protected from outside infection. 



New infection experiments with Uromyces dactylidi* W. Krieo {Ceiiibl. 

 Bakt. [etc.], 2. Aht.. 25 {1909), No. 1.',-1S, pp. .',30-.',36) .—Te\eutoii])ores of U. 

 daeti)lidis obtained from different regions were sown on species of Ranunculus, 

 and the results are given, together with a discussion of the biological species 

 of U. dactylidis. The infection experiments were successful with Ranunculus 

 sylvaticus, R. platanifolius, R. aeonitifolius, R. alpestris, R. glaeialis, R. repens, 

 and R. bulbosu<i. 



Some anemone rusts, E. W. D. Holway idard. Chron.. 3. ser., 47 {1910), 

 No. 1205, p. 67). — Attention is called to the investigations of Arthur and Tranz- 

 schel in America and Europe on the relationship of some of the Uredineae, par- 

 ticularly of the species Puecinia fusca found on Anemone nemorosa and the 

 rust P. pruni-spinosw on cherry, plum, peach, etc. It is stated that Tranzschel 

 in l'.)04 and Arthur later (E. S. K.. is. p. 50) showed that the .Ecidium on Ane- 

 mone was a stage in the life history of the plum rust. Another species has been 



