546- EXPEEIMENT STATION EECORD. 



complete positive results were obtained with tlie hosts A. vernalis, A. pratensis, 

 and. A. Pulsatilla, but only negative results with A. alpina, A. sylvestris, and 

 Atragene alpina, which are thought to present examples of genuine immunity 

 to P. pulsatillce grown on A. montana. 



The specialization here noted, as connected with systematic classification, is 

 contrasted with the geographical specialization in the case noted above by the 

 same author, the two types of specialization being discussed. 



Overwintering' of cereal rusts in uredospore form, L. Montemaetini {Riv. 

 Patol. Veg., 7 {1914), No. 2, pp. ^O-^^).— Noting the infection of wheat by 

 Puccinia in the uredospore stage, passing over from grasses in warm autumn 

 weather, the author also records the germination at Stradella and Pavia of 

 uredospores developed on volunteer and other cereals after subjection for some 

 days to temperatures several degrees below the freezing point. 



Rust attack of winter cereals, L. Hiltner (Prakt. Bl. Pflanzenhau u. Schuts:, 

 n. ser., 12 (1914), No. 7, pp. 81-84). — It appears from numerous reports received 

 by the author that rust is present in all parts of Bavaria and also in neighbor- 

 ing regions in greater or less severity, affecting varieties of rye as well as 

 wheat. The matter is discussed with reference to varietal resistance and the in- 

 fluence, in this connection, of phosphoric, nitrogenous, and other fertilizers, a 

 right use of these with suitable cultivation appearing to increase resistance. 



Yellow rust, which is now said to attack the squarehead variety of wheat, is 

 not controlled by any means yet available. Earlier sowings of rye suffer less 

 from rust than do later plantings. The kind of crop previously grown on the 

 land is said to exert considerable influence. Reports indicate also a connec- 

 tion between abrupt changes in temperature and rust attack. 



Treatment of winter grain with corrosive sublimate, L. Hiltneb (Pralct. 

 Bl. Pflanzenhau u. Sclmtz, n. scr., 12 (.1914), No. 8-9, pp. 85-89). — Discussing the 

 results of a large number of practical tests in treating seed grain for autumn 

 sowing, as reported from various localities, the author states that steeping seed 

 wheat in the Sublimoform solution and rye in corrosive sublimate preparation 

 materially reduced injury, not only from stinking smut, etc., but also from 

 snails and mice, but that loose smut of wheat was not prevented by such 

 treatment. 



Chinosol and fonnaldehyde as protection against rusarium in cereals, L. 

 Hiltneb (Prakt. Bl. Pflanzenhau u. Schutz, n. ser., 12 (1914), No. 7, pp. 77-80, 

 fig. 1). — The author has confirmed, with field tests, the results obtained by 

 Gentner (E. S. R., 28, p. 846). The sublimate solution used to steep the seed 

 grain afforded complete protection. Formaldehyde was not so satisfactory. 

 Chinosol is regarded as unsatisfactory in this connection. 



Limitation and management of grain for seeding, L. Hiltneb (Prakt. Bl. 

 Pflanzenhau u. Schutz, n. ser., 12 (1914), No. 8-9, pp. 90, 91). — Noting the special 

 importance, at this time, of economical management of the available supply of 

 grain for seeding purposes, the author urges careful selection of seed for 

 germinability, pi-evious treatment of the seed grain with approved solution, and 

 avoidance of too thick sowing. 



Use of rusted grain for seed, L. Hiltneb (Prakt. Bl. Pflanzenhau u. Schutz, 

 n. ser., 12 (1914), No. 8-9, p. 91). — Since rust, unlike smut, is not transmitted 

 to the crop through diseased seed, the use of grain from rusted crops is not 

 regarded as dangerous. Cases where yellow rust was particularly severe and 

 where also the output of grain was much reduced were found to show severe 

 attack from foot or stalk disease, or from diseases due to other causes. 



Dry spot of oats, L. Hiltneb (Prakt. Bl. Pflanzenhau u. Schutz, n. ser., 12 

 (1914), No. 3-4, pp. 28-41, fig. 1). — The general outcome of the experiments and 

 observations here noted is the confirmation of the view that dry spot of oats is 



