656 EXPERIMENT STATION EECORD. 



observed on the leaves of the date pahii. Diseased leaves should be 

 cut oil' and burned in order to prevent the spread of the disease. 

 Sound plants may be sprayed with Bordeaux mixture, or the leaves 

 may be washed with soapsuds or a weak solution of lysol to prevent 

 the germination of spores. 



A disease of conifers, G. Massee {Gard. Chron.,3. ser.^ 27(1900), 

 No. 686,2^' ^01^ f 9- !)• — A report is given of attacks of Sclerotinict 

 fuckeliaha on Sequoias and other coniferous trees. When first 

 observed, the portions attacked seemed to be covered with a dense out- 

 growth of gray mold. After the twigs were dead, numerous small 

 black sclerotia. about the size of a pin's head, were found embedded in 

 the bark and also in the tissues of the diseased and fallen leaves. Arti- 

 ficial infection of conidia have shown that Scotch fir and, perhaps, 

 most conifers are susceptible to this disease. Other groups of plants, 

 such as cherries, etc., have been artificially inoculated, but, on the 

 whole, coniferous seedlings appear to suffer the most. When the dis- 

 ease appears, it spreads very rapidly, especially during damp, cloudy 

 weather, and spraying with dilute Bordeaux mixture or what the 

 author calls "violet mixture" should be resorted to as a check to pre- 

 vent further spread. Experience has shown that plants once attacked 

 invariably die; hence all diseased plants should be promptly removed 

 and burned. The "violet mixture" recommended is said to adhere to 

 the foliage better than the Bordeaux mixture and does not leave a 

 white deposit on the plant sprajxd. It is composed of copper sulphate 

 2 lbs,, copper carbonate 3 lbs. Dermanganate of potash 3 oz., and 

 water 18 gal. 



New species of fungi, Flora W. Pattersox {Bvl. Torrey Bot. Club, 27 {1900), 

 No. 5, pp. 282-286). — Descriptions are given of 17 new species of fungi, many of 

 which are parasitic. Stemphylium butryi is described as growing in butter, the sur- 

 face of which gradually becomes a bluish black color. 



New species of fungi, J. B. Ellis and B. M. Everhart {Bui. Torrey Bot. Club, 

 27 {1900), Xo. 11, pp. 571-578). — Descriptions are given of 27 new species of fungi, 

 many of which are parasitic. The specimens are from various American localities. 



The rusts of cereals, E. Marchal {Jour. Soc. Agr. Brabant-Hainaut, 1900, pp. 

 286-288). 



The cereal rusts of Belgium, H. Vaxderyst {Rev. Gen. Agron. [Lourain'], 9 

 {1900), No. 8, p)p- 359-368). — The author reports having observed 189 species, repre- 

 senting 17 genera, of Urediuie in Belgium during the season of 1898. Brief notes are 

 given on their distribution throughout the country. 



Depreciation of the yields of cereals due to rusts, A. Gregoire {Jour. Soc. 

 A'jr.Brabant-IIa'mauf, 1900, p. 173). 



The fungus diseases of the potato and their treatment, H. Potel {Bol. Imt. 

 Agron. Sao I'niilo, 10 {1S99) , No. 11-12, pp. 795-799). 



Fungus diseases of sweet potatoes, H. Potel {Bol. Agr Sao Paulo, 1. ser. 

 1900, No. 1, 2>p. 45-48). 



The potato disease, its history and prevention, Lavergxe {Santiago, 1900, 

 pp. 10). 



A disease of potatoes and melons in Santiago and Coquimbo, Lavergne 

 {Santiago, 1900, pp. 12). 



