DISEASES OF PLANTS. 145 



forest fire laws of the State, and gives a resume of state fire rrotective legis- 

 lation and activities in Ibe United States. 



Annual progress report on forest administration in the Province of 

 Bihar and Orissa for the year 1913-14, with a summary of progress during 

 the five years, 1909-10 to 1913-14, H. Carter (Ann. Rpt. Forest Admin. 

 Bihar and Orissa, 1913-1',, pp. VI^-GO-3, pi. 1).—A report on the administra- 

 tion and management of tlie state forests in the Province of Bihar and Orissa 

 for the year 1913-14, including a financial statement for the year. All im- 

 portant data relative to alterations in forest areas, forest survej-s, working 

 plans, protection, and miscellaneous work, yields in major and minor forest 

 products, revenues, expenditures, etc., are appended in tabular form. A brief 

 summary is also given of progress made during the 5-year period. 



Forestry in the British Empire, W. Schlich (Quart. Jour. Forestry, 9 

 (1915), Xo. 2. pp. 95-112). — A paper read at the Forestry Conference of the 

 Anglo-American Exposition, London. July IG, 1914, in which the author sketches 

 the progress of forestry in the United Kingdom and in the various British 

 colonies. 



DISEASES OF PLANTS. 



Fungus diseases of plants and their treatment, C. O. Farquhaesox (Bui. 

 Agr. Dept. South. Prov. Nigeria, No. 2 (191^), pt. 1, pp. S). — This, the first of 

 a series, is a very brief and general discussion of fungus diseases and means 

 of protection therefrom in this region. 



On the cause of spore formation in rusts, particularly in Puccinia mal- 

 vacearum, L. Blaringhem (Bui. Sac. Bot. France, 61 (1914), No. 1-3, pp. 1^9- 

 157). — In continuation of a study on the relation between P. mulvacearum 

 and its host, Althwa rosea (E. S. R., 30, p. 453), the author gives an account 

 of experiments to force the production of spores by the fungus, and the results 

 obtained are believed to have a bearing on spore formation of rusts in general. 

 The conditions for spore formation are said to be external and result from 

 changed osmotic tension of the tissues. 



By means of cultures of Althaea plants in sugar and salt solutions, dehydra- 

 tion through injury to roots, freezing, etc., it was found possible to break down 

 the symbiosis held to exist between the host and its parasite and to compel the 

 production of spores by the fungus. 



Some Scottish rust fungi, M. Wilson (Jour. Bot. [London], 53 (1915), No. 

 626, pp. 4.3-Jf9). — Notes are given on the occurrence of Puccinia prostii on 

 cultivated tulips, P. horealis and P. septentrionalis on Thalictrum alpinum, P. 

 anthoxantJti on Anthoxanthum odoratum, and Melanipsora alpina on Salix 

 herbacca. 



Ustilago, A. PoTEBNiA (luzh. Russ. Sclsk. Khoz. Gaz., No. 45 (1911); abs. 

 ?n Zhur. Opytn. Agron. (Russ. Jour. Expt. Landio.), 14 (1913), No. 3, p. 305). — 

 The author emphasizes the fact that in combating Ustilago treatment of the 

 seeds with copper sulphate or formalin is ineffective. U. tritici and U. nuda 

 are best combated by treatment with hot water. 



On the propagation of rust in cereals in Sweden and France, L. Blaring- 

 hem (Bui. Soc. Bot. France, 61 (1914), No. 1-3, pp. 86-94).— The author dis- 

 cusses the mycoplasma theory of Eriksson (E. S. R., 14, p. 770) and the more 

 recent publications by Beauverie (E. S. R., 30, p. 241) and others, and gives 

 an account of his investigations since 1912, the previous experiments having 

 been already reported (E. S. R., 31, p. 841). He agrees with Beauverie that 

 the rust pustules on the seed grain have a very important bearing on the dis- 

 tribution of disease in France. Autumnal and early spring infections of Puc- 



