150 EXPERIMENT STATION RECOED. 



logging operations in the Pacific Nortliwest is here reported. The data pre- 

 sented are di.scussed under the general headings of steam distillation products, 

 destructive distillation products, and hydrolyzed or fermentation products. 



The experiments cited show that high grade commodities may be obtained 

 from the waste wood. This waste wood is of enormous quantity but its success- 

 ful utilization api^ears to lie in the production of commodities which may be 

 sold in somewhat locally restricted regions. 



DISEASES OF PLANTS. 



The fundamentals of general phytopathology, H. Klebahn (Gnmdzuge der 

 aJlgcmeinen PhytopathoJogie. Berlin, 1912, pp. Ufl, figs. 74). — The author dis- 

 cusses the causes of plant diseases from the standpoint of the influence of 

 chemical and physical properties of soils, meteorological conditions, cultural 

 practices, wounds and their accompanying phenomena, parasitic organisms, both 

 plant and animal, and innate conditions, such as enzyms, constitution of proto- 

 plasm, etc. 



Diseases of agricultural crops, A. Legault (Maladies Cryptogamiques des 

 Plantes Agricoles. Lille, 1911, pp. 82). — This worii popularly describes the more 

 important diseases of the principal agricultural and horticultural crops. Brief 

 keys are given by which the cause of the disease may be readily recognized, 

 after which the effect on the host plant is described and methods of treatment 

 are suggested. 



Some important plant diseases of Oregon, H. S. Jackson, H. P. Barss, and 

 F. D. Bailey (Orego^i Sta. Bien. Crop Pest and Hort. Rpt. 1911-12, pp. 218- 

 308, figs. 58). — This consists of a general account of some of the more important 

 diseases occurring in the State, and is the result of general survey work embody- 

 ing the observations of the staff of the department and the results of minor 

 investigations and experimental work together with the results of other observ- 

 ers. Among the diseases described are crown gall, mushroom root rot of tree 

 and small fruits, diseases of pomaceous and stone fruits, nut crops, small fruits, 

 vegetables, and field crops. 



Plant protection, F. G. SrEBLEB (Landw. Jahrb. Sclnceiz, 21 (1913), No. 1, 

 pp. 18-20). — Observations and results of experiments on various diseases are 

 given. 



Loose smut was found to attack more than half of the plants used for cross- 

 ing varieties of barley. This result was attributed to the necessary cUpping 

 and consequent exposure incident to artificial fertilization. Tylenchus devas- 

 tatrix was noted as checking the growth of oats. Foot disease of wheat (Ophio- 

 bolus) was noted in some sections. A leaf roll of potatoes was thought to be 

 due to a Fusarium. It is claimed to have been found that spores of Phytoph- 

 thora are able to infect potato leaves not only through the stomata but also 

 through the epidermis at any point. Red clover was attacked severely by 

 canker (Sclerotinia trifoliorum). A rust (Colletotrichum lindemuthianwni) se- 

 ■N'erely attacked beans, for which trouble disinfection of seeds is considered im- 

 practical as a defensive measure. 



Injury to soil by noxious substances produced by the fungus parasites 

 of plants, E. Pantanelli (Atti R. Accad. Linoei, Rend. CI. Sci. Fis., Mat. e 

 Nat., 5. ser., 22 (1913), I, No. S, pp. 170-17 J, , fig. i).— Experiments employing 

 gelatin or other cultures of Fusarium incarnatum in connection with several 

 plants attacked by this parasite are said to show that substances are produced 

 during the development of the fungus and diffused through the substratum 

 which may arrest the growth of roots or the germination of seeds of such plants. 



