DISEASES OP PLANTS. 745 



to determlnlug methods for estimating protection funds and the formation 

 of fire plans. 



Forest taxation in Washington, F. G. Miller {Proc. Soc. Amer. Foresters, 

 9 {1914), ^0. 3, pp. 407-447)- — The author here reports the results of inquiries 

 among timber owners in the State of Washington to determine the actual 

 burden of taxation on forest land as compared with that borne by other classes 

 of real estate, the effect of the present system of taxation on the management 

 of forest property, and what remedial legislation should be enacted. 



DISEASES OF PLANTS. 



Bacteria in relation to plant diseases. III, E. F. Smith (Carnegie Inst. 

 Washington Pub. 27, vol. 3 (.1914), PP- VIII-{-309, pis. ^7, figs. i,55).— Continuing 

 the method adopted in the previous volume (E. S. R., 27, p. 44), the author 

 describes a number of vascular diseases of plants due to bacteria. Among 

 these are the following: Bacterial disease of sugar cane (Bacterium vascu- 

 larmn), sweet corn disease (B. stexcarti), the Grand Rapids disease of tomato 

 (Aplanobacter michiganense) , bacterial disease of orchard grass (A. ratliayi), 

 Trinidad disease of banana (Bacillus musae), and brown rot of solanaceous 

 plants and wilt of tobacco (Bacterium solana<;earum) . 



In addition to the above, notes and discussions are given of a number of dis- 

 eases that have been attributed to bacteria, but which are considered too im- 

 perfectly knv^wn to be of definite classification or are of doubtful identity. 



Phytopathological problems, J. Eriksson (Inst. Internal. Agr. [Rome], 

 Actes Conf. Intemat. Phytopath., 1914, pp. 231-233). — This is a brief discu,ssion 

 of certain plant diseases considered as falling in two categories, those long 

 known and those of more recent appearance as dangerous pests, each In con- 

 nection with measures looking to its control. 



Means for combating plant diseases, M. Hollrung (Die Mitt el stir Be- 

 kdmpfung der Pflanzenkrankheitcn. Berlin, 1914, 2. ed., rev. and enl., pp. F77/-f- 

 340, figs. 30). — This work is a revised and enlarged edition of the author's 

 handbook of chemical means for combating plant diseases (E. S. R., 10, p. 363). 

 Chemical, physical, and mechanical means for combating fungus and insect 

 injuries are described at length, the author making a very comprehensive 

 review of the literature during the first half of 1913 and that appearing previ- 

 ously regarding the use of fungicides and insecticides. A chapter is included 

 on the construction and use of spraying apparatus. 



Cryptogamic review for 1912, G. Briosi (Atti 1st. Bot. Univ. Pavia, 2. ser., 



15 (1912). pp. 242-273). — This is a brief account of studies carried out during 

 1912 on cryptogamic disea.ses of plants, listing diseases and causative agencies 

 according to plants attacked. 



Maryland plant diseases, 1913, J. B. S. Norton (Rpt. Md. State Hort. Soc, 



16 (1913), pp. 164-168). — Notes are given on plant diseases observed in the 

 State during the year, together with a brief discussion of the relation of weather 

 to the prevalence of plant diseases. 



Botany, H. S. H..mmond (New Mexico Sta. Rpt. 1913, pp. 34-36). — The princi- 

 pal work of the plant pathologist is said to have been an investigation of the 

 disease of chili peppers. The results indicate that the disease is of bacterial 

 origin and that the organism is closely related to Bacillus solanacearnm , which 

 causes wilt of the tomato and other solanaceous plants. An experiment was 

 carried on to test the value of treating sf^ed for the prevention of the disease, 

 but although various chemicals were used no benefit seemed to follow their 

 application. 



