DISEASES OF PLANTS. 845 



ing timber in the Unitetl States, coiiceiUratiou of timber ownership, acreajje of 

 timber holdinp:s, value of standing timber, and the public land iwlicy as a 

 primary cause of concentration of timl)er ownership. 



The foremost facts shown are the concentration of a domiiuUiug control of 

 our standing timber in a comparatively few enormous holdings, steadily tending 

 toward a central control of the lumber industry; vast speculative purchase and 

 holding of timber land far in advance of any use thereof; and an enormous 

 increase in the value of this diminishing natural resource, with great protits to 

 its owners. 



The lumber industry (£/. 8. Senate, 61. tUnuj., .i. Nr.v.v., I)(,r. HIH {1011), pp. 

 3S, pi. 1). — A summary of the above report. 



Forest products {Bur. of the Vemus [U. »S'.], Foreat Products, lOlS, Nos. 1, 

 pp. 10, fig. 1; 2, pp. 4^; 3, pp. 10; Jf, pp. 4; 5, pp. 8; 6, pp. 12; 7, pp. 6; 8, pp. 8; 

 0, pp. 8).— A series of pamphlets compiled by the lUireau of the Census in 

 cooperation with the Forest Service of this Department, and consisting of a 

 statistical review for 11)1 1 of the production, consumi)tion, imi)orts, and exports 

 of the following forest products, arranged in order to corresiwjnd to the pam- 

 phlet numbers above: Pulpwood; lumber, lath, and shingles; slack cooperage 

 stock; excelsior; veneers; tight cooperage stock; wood for distillation; cross- 

 ties, including preservative treatments; and poles. Including preservative treat- 

 ments. 



DISEASES OF PLANTS. 



Proceeding's under the destructive insects and pests act, 1877 and 1907, 

 and the board of ag-riculture act, 1889, A. G. L. Kogers {Bd. Agr. and Fish- 

 erics [London], Ann. Rpt. Hort. Branch, 1912-13, pp. 57, nuips 8). — Accounts 

 are given of the occurrence, distribution, methods of control, etc., of the goose- 

 berry mildew {Sphwrotheca Diors-uvw), the wart disease of potatoes {Syncliyt- 

 rium endohloticum) , tomato and cucumber canker {Mycosphwrella citrulUna), 

 the larch sawfly {Lygwonematus erichsonii), vine louse {Phylloxera rastatri.r), 

 and Mediterranean fruit fly {Ceratitis capitata), pests that are scheduled under 

 the destructive insect and pest acts, and on the silver leaf disease and some 

 other minor pests which are not scheduled. 



Annual report on mycology, E. .1. Butler {Ann. Rpt. Bd. ScL Advice India, 

 1911-12, pp. 124-127). — The work carried on is briefly discussed and includes 

 investigations of some sugar cane diseases, the occurrence of Rhizoctonia on 

 cotton, peanuts, jute, cowpeas, potatoes, etc., and a disease of taro causal by 

 Phytophihora colocasiw. In addition brief accounts are given of studies on the 

 grapevine mildew caused by Oidiuni tuckcri, the methods of control of the pink 

 disease of Hevea caused by Corticium salmonicolor, and a rust of castor beans 

 due to Mclampsorclla ricini. 



Report on mycology, E. .7. Butler {Ann. Rpt. Bd. Sci. Advice India, 1912-13, 

 pp. 116-122). — An account is given of the chief diseases of plants investigated 

 during the year. These include studies on the ufra disease cause<l by nema- 

 todes, the smut due to TiUetia horrida, false smut caused by Ustilaginoidea 

 virens, and a disease due to Sclcrotium oryzw. The rice diseases have been 

 noted at length elsewhere (E. S. R.. .SO. p. 244). 



In addition to the above, notes are given on root rot of various crops due to 

 a species of Rhizoctonia, sugar cane diseases, wheat rust in which it is stated 

 that Puccinia triticina and P. graniinis are the most important species of rust 

 in India, an anthracnose of sisal hemp due to Collet otri chum agaves, cereal 

 downy mildews in which it is demonstrated that in India these diseases are due 

 to a species of Sclerospora, bud rot of palms, some tea diseases, etc. 



