DISEASES OF PLANTS. 149 



Tlio timber \v:is sawn to difteroiit sizes, seasmied in the open air, and the oil 

 injected mider a pressure of 80 to So lbs. per square inch for 8 hours. The 

 creosote was warmed b.v steam during iise and a vacuum of lbs. was obtained 

 in the cylinder before the oil was injected. The tabic shows the alisorption of 

 creosote per cubic foot of the wood impregnated. 



Big returns from growing trees, F. Bubns {Faniiiii;/. I [I'.iini], \<i. ■',. pp. 

 176, 177, fifjs. 6). — Financial statements are given of results obtained from a 

 well-managed woodlot iu Pennsylvania and of another in Nebraska. 



DISEASES OF PLANTS. 



New and little-known plant diseases in Nebraska, F. D. Heald (.17>,s'. in 

 Science, n. xcr.. 23 (tUdO). ,Vo. ^IXi. p. G.')). — Notes .nre given on the following 

 diseases : 



(1) Twig-girdle of the apple due to a I'homa-like fungus. (2) Trunk rot of 

 the cherry due to Hchizophyllum commune. A small orchard of trees 5 to 6 

 years old was completely destroyed by this fungus. (3) Wheat leaf fungus 

 {Leptospharia tritici). Among other things, its distribution over the same 

 area as the Hessian fly was noted. (4) Bacterial leaf blight of wheat. A bac- 

 terial blight of the leaves was common on the leaves of wheat in the breeding 

 plat at the experiment station and was also observed elsewhere. (.5) Bacterial 

 blight of soy bean. This disease was quite serious on soy beans used as an 

 orchard cover crop at the experiment station. ((\) Moldy corn due to a fungus 

 provisionally referred to Diplodiu jncn/dis, l)ut differing in several points in habit 

 and structure. 



Report of the consulting botanist, W. Caeruthers {Jour. Roy. Ayr. fioc. 

 EnyUind. 66 {1905), pp. 162-173, figs. 2). — After brief accounts of the purity 

 and germination of clover and grass seeds and the enumeration of species of 

 poisonous and troublesome weeds, the author describes a number of diseases of 

 plants which were observed during the year. 



The principal of these were diseases of potatoes, and the observations are 

 briefly summarized regarding the Nectria solani, potato scab, potato canker 

 hitherto ascribed to Chrysophlyctis endobiotica, a wart disease, the early blight 

 caused by Maerosporiuni solani, and two bacterial diseases of potatoes, one at- 

 tributed to Bacillus sohtniperda, the other to B. phytophihorus. Recent observa- 

 tions place the fungus Chrysophlyctis with ffidomyces. Notes are given on a 

 number of other miscellaneous diseases. 



The rusts of Australia, D. McAlpine {Melbourne: Dept. Ayr. Victoria, 1906. 

 pp. Till + .3-'i9, pis. .5.5, fiys. 28). — This publication treats of the structure, nature, 

 and classification of the rusts of Australia, all the species known to occur 

 being included in the book. Those which are not native to the country are 

 specially designated, and all the species are figured so far as specimens were 

 available. 



This monograiiii is ])roliminary to a study of methods of preventing the 

 appearance or limiting the spread of rusts on numerous commercial crops. The 

 first part treats of the different stages of the rusts and their relation to the 

 host plants and to other fungi, and a chapter is devoted to the present position 

 of rust in relation to wheat production in Australia. In the second part of the 

 book classifications and technical descriptions are given of the different species. 

 An extensive bibliography of literature completes the work. 



Infection of plants by rust fungi, W. L. Balls {New Phytol., .) {1905), No. 

 1, pp. IS, 19). — The author notes having observed that the germ-tubes of spores 

 on infected leaves radiated from the spore if the surrounding atmosphere was 

 kept well saturated, and this suggested that water vapor might be the body in 

 search of which the fungus entered the stomata. 



