346 EXPERIMENT STATION RECORD. [Vol.43 



copper sulphate or of liot water applied to the seed grain. A new tomato 

 di.sease characterized by the appearance of bi'own sunken spots, followed by 

 wilting and death, is ascribed to a species of Ascochyta. Stripe disease of 

 barley was prevented by soaking the seed grains for from 12 to 16 hours in 

 0.5 per cent copper sulphate solution. Another successful method involves the 

 employment of 200 gm. of copper sulphate in 2i liters of water for each 

 hectoliter of seed grain (about 2.5 oz. copper sulphate in 0.9 qt. of water per 

 bushel of grain). 



Gumiiiosis, root rot, stem rot, and apoplexy in garden plants, L. Savas- 

 TANO (R. Staz. Sper. Afirumlc. e Fruttic. Acireale, Bol. 28' {1911), pp. 4). — ^The 

 characters and treatments appropriate to the .several diseases ^re briefly 

 outlined. 



Two destructive rusts ready to invade the United States, J. C. Abthub 

 (Science, n. ser., 51 {1920), No. ISlJf, pp. 246, 2^7).— The author calls attention 

 to two rust fungi which are said to possess possibilities of great harm, but 

 which have not yet been reported in the United States. 



One of these, Uredo arachidis or Puccinia arachkUs, is said to be a serious 

 menace to the peanut crop and has been reported in a number of places in South 

 America and the West Indies. ExiJeriments for its control with Borueaux 

 mixture were carried on in 3Iontserrat, but without very much success. 



The second rust to which attention is called is one on potatoes and tomatoes 

 and is due to P. pittieriana. This rust is reported from Central and South 

 America, where it is believed to be of considerable importance. 



True and false silver leaf disease {Gard. Chron., 3 ser., 66 {1919), No. 1712, 

 p. 202). — This is a condensation of the data presented by Biutner in his article 

 previously noted (E. S. R., 42, p. 150). 



Funiagine in cultivated trees and the lime-sulphur treatment, L. Savas- 

 TANO {R. Stas. Sper. Affrumic. e Fruttic. Acireale, Bol. 25 {1916), pp. 10). — This 

 includes accounts of experiments looking to the control of the fumagine due 

 to the presence of certain fungi, the mycelium of which cause the smoky or 

 sooty appearance but are otherwise harmless. 



Lime-sulphur in winter, L. Savastano {R. Sta::. Sper. Af/rumic. e Fruttic. 

 Acireale, Bol. 23 {1916), pp. 4)- — This bulletin deals with the necessity for 

 simplifying the employment of lime-sulphur, the different types of this fungi- 

 cide, and the necessary proportions, utensils, and manipulations. 



Making lime-sulphur at home {Brit. Columbia Dcpt. Agr., Sort. Branch 

 Circ. 61 {1920), pp. 5). — It is stated that at the present time the fungicide most 

 extensively used in British Columbia is the so-called lime-sulphur solution. 

 This is more commonly purchased in the form of the concentrate, a clear liquid 

 of deep orange color requiring only the proper amount of water to make it 

 ready for use. In view of a probable shortage of the commercial concentrate, 

 directions are given for making it from the raw material, with estimates as 

 regards cost and suggestions for storing. 



Lime-sulphur as a substitute for Bordeaux mixture, L. Savastano {R. 

 Staz. Sper. Agrumic. e Fruttic. Acireale, Bol. 22 {1916), pp. 4)- — This bulletin 

 deals with lime-sulphur as adapted to employment against such diseases as 

 Fusickidium pirinum and F. dentriticum on pome fruits; Exoascus deformans 

 and E. pruni on stone fruits ; and Cycloconiuvi oleagimmi on olive. 



Lime-sulphur wash [with saponin], E. S. Salmon and L. K. Wormald 

 {Gard. Chron., 3. ser., 66 {1919), No. 1697, p. 4). — Recent experimentation at the 

 South Eastern Agricultural College, Wye, has shown that a small quantity 

 (0.05 per cent) of saponin in solution added to lime-sulphur wash greatly 

 improves the spreading quality and proportionately increases the protective 

 capacity of the pi-eparation. The use of the improved spray is said to secure 



