DISEASES OF PLANTS. 559 



strate the efladency of Bordeaux mixture a.s a preventive, or at least 

 as tlie best fuugicide to be einiDloyed. In some cases it lias failed 

 entirely: 



Powdery mildew or oidiumof tlie gvnl^e (Uneinula ?<em^or), antbrac- 

 nose of tbe grape [Glceosjiorimn ampelophagum), peacb -leaf curl {Taph- 

 rina deformans)^ peach rot {Monilia fructif/ciia), gooseberry powdery 

 mildew {Sphrrotheca morsuvcv), currant-leaf spot {Siploria ribis), rasx)- 

 berry anthracnose {Glwosponum venetum), potato scab {OUspora ,^cabies), 

 downy mildew of the tomato {PhytopUthora infestans), cranberry gall 

 fungus {ISynchytrium vaccinii), cianberry scald, loose smut of wheat 

 ( UstiJago tritiei), stinking smuts of wheat [TiUetiafectens and T. tritica), 

 corn smut {Lhtilagomaydis), and rusts of cereals [Puccinia ruhujo-vera, 

 P. coronata, and P. graminis). 



Treatment for oat smut, A. A. Mills ( Utah ^ta. Rpt. 1893, pp. 

 225-228). — Two years' experiments were conducted Avith the Jensen or 

 hotw^ater and potassium sulphid treatment for oat smut. The direc- 

 tions for the Jensen treatment' are quoted. 



The potassium sulphid treatment consisted in soaking the seed for 

 24 hours in a solution of 1 lb. of iiotassium sulphid to 24 ^al. of water, 

 or for 12 hours in a solution of 1 lb. of potassium sulphid to 12 gal. of 

 water. Tabulated results are given showing that for the average of 

 the two years the yield of grain and straw from the plats given the hot- 

 water treatment was in advance of the others, and that plats given the 

 potassium sulphid treatment were farin advance of the ones not treated. 

 In none of the treated plats was there any smut, while the check plats 

 contained considerable. Further trials are to be continued before defi- 

 nite conclusions are drawn, but the author thinks that the potassium 

 sulphid very materially increases the yield both of grain and straw. 



Insecticides and fungicides, P. H. Rolfs {Florida Sta. Bui. 23, pp, 

 36). — Popular informati(^n is given on the preparation and application 

 of fungicides and insecticides. Formulas are given for Bordeaux mix- 

 ture, eau celeste, ammoniacal copper carbonate, xiotassium sulphid, and 

 directions for hot-water treatment of oats for oat smut. Among the 

 insecticides formulas are given for Paris green, London purple, kero- 

 sene emulsion, resin washes, sulphur spray, pyrethrum, tobacco decoc- 

 tion, naphthalin, bisulphid of carbou and lime, salt and sulphur mix- 

 ture. Directions are also given for combining fungicides and insecti- 

 cides. Insecticides that have been tested at the station and found to be 

 of no value for the purpose for wiiich they are recommended are salt, 

 decoction of Jamestown weed, decoction of China-tree leaves, and 

 China-tree berries. A list of the chemicals, together with their retail 

 X)rices, is given. The bulletin concludes with a table giving directions 

 for the use of fungicides and insecticides. 



Morphology and anatomy of leaves and shoots deformed by Exoasceae 

 (cont.). W. G. Smith (Forstl. naturw. Ztschr., 3 (1894), JSfo. 12, pp. 473-48^). 



lU. S. Dept. of Agr., Farmers' Bulletin 5; E. S. K., 3, p. 631. 



