DISEASES OF PLANTS. 447 



The experiments have been practically a failure owing to the high winds and 

 drifting sand. Of the small number of specimens alive from the planting of 

 1901, none of the trees have proved promising and only two of the ornamentals, 

 Rosa rugosa and Lycium ettropceum, can be said to be thrifty. 



Forest nursery stock for distribution in the spring of 1910, A. F. 

 Hawes (Vermont Sta. Circ. 4, pp. 4). — A brief description is given of the char- 

 acter and quantity of nursery stock available for distribution in 1910, together 

 with directions for planting and cost of planting operations. 



DISEASES OF PLANTS. 



Report on plant diseases in Ohio for 1909, A. D. Selby (OJiio State Hart. 

 Soc*. Ann. Kept., 43 {1910), pp. 77-88). — The author discusses the more promi- 

 nent diseases of orchard fruits, small fruits, shade trees, and truck, grain, and 

 forage crops, special attention being given to apple spraying and spray injuries, 

 in which the results obtained by using a modified Bordeaux mixture made by 

 adding iron sulphate as a sticker are compared to those obtained by the use of 

 Bordeaux mixture alone. Tests are also reported on the use of arsenate of 

 lead, and self-boiled Ijme-sulphur sprays. 



As a result of these experiments it is claimed that the Bordeaux mixture and 

 iron sticker modification is a most promising and useful spray for apple 

 orchards, and that it may be advisable to use 3 lbs. of the iron sulphate in 

 place of 4 lbs., making the formula 2 : 3 : 5 : 50. 



The smuts and rusts of Utah, A. O. Garrett (Mycologia, 2 {1910), No. 6, 

 pp. 265-304). — This is a catalogue of rusts and smuts collected by the author in 

 Utah, including 26 species of smuts and 144 species of rusts. 



[Report of the botanist on plant diseases], II. T. GtJssow {Canada Expt. 

 Farms Rpts. 1910, pp. 251-279, pis. 2, figs. 5). — General directions are given re- 

 garding the dissemination and control of the common diseases of cereals, 

 potatoes, fruit trees, grapes, etc., due to fungus or bacterial agencies. 



Notes on mycology and plant pathology, E. Griffon and A. Maublanc 

 {Bui. 8oc. Mycol. France, 25 {1909), No. 1, pp. 59-63, figs. 3).— The authors 

 describe as new the following economic fungi : CoUetotrichuni ixorce on I.rora 

 alba, Dichomera carplni on Carpinus bctulus, Ncemospora jasmint on Jasminum 

 officinale, and Cho'tophomu erysiphoides on Querciis ilex. 



Plant diseases; potato spraying, B. F. Ltjtman {Vermont Sta. Bui. 153, pp. 

 619-629). — A report is made on the plant diseases and potato spraying experi- 

 ments of 1909. On account of the dry season, no serious outbreaks of disease 

 on economic plants occurred. 



The potato spraying experiments wei"e conducted for the purpose of deter- 

 mining what constituent of Bordeaux mixture causes the increased yield, from 

 sprayed plats. The yields from plats sprayed with Bordeaux mixture, Bor- 

 deaux mixture and iron sulphate, iron sulphate and lime, and Bordeaux mixture 

 sprayed on the soil, were compared. It was found that only the sprays contain- 

 ing copper showed any increased yield over the check plats, and the conclu- 

 sion is drawn that in addition to its fungicidal value, the copper spray when 

 applied to the foliage acts as a stimulant to the plants, and thus increases 

 the yield of marketable tubers sufliciently to more than pay all the expenses of 

 spraying. 



Notes on Chilean fungi, I, R. Thaxter {Bot. Gaz., 58 {1910), No. 6, pp. 

 430-432, pis. 2, fig. 1). — The author describes as new three parasitic fungi, viz, 

 Taphrina entomospora on the living leaves of the antarctic beech {Nothofagus 

 untarctica hicrenata and N. artarctica idiginosa) ; Uncinula nothofagi, usually 

 associated with the Taphrina on the diseased leaves of N. antarctica bicrenata; 



