DISEASES OF PLANTS. 649 



reported as new American hosts for Peridermium pyriformc. Notes are also 

 i^iven on spocies or stn^ps of fungi not previously reported from Connecticut. 



The development of GlcEOsporium malicorticis, H. S. Jackson (Ab*. in Phy- 

 iopatholoyy, ,i (1!)U), Xo. 2, p. 95). — A description is given of the perfect or 

 ascospore stage of (J. malicorticis, which the author has been liaving inuler 

 observation for a niunber of years. 



Pure cultures of the ascospores were made, and inoculation experiments 

 showed that it takes one year for the cankers to mature. All inoculations pro- 

 duced typical cankers, which bore conidia typical of G. malicorticis. 



Attention is called to the resemblance both in conidial and ascospore stages 

 to the fungus Pseu(Urpcziza rihis. The exact generic position of the fungus is 

 somewhat doubtful, but it is described as Neofabrea malicorticis, a new combi- 

 nation. 



The structure and development of crown gall: A plant cancer, E. F. Smith, 

 Nellie A. Beown, and T.rciA McCulloch (U. 8. Dcpt. Ar/r., Bur. Plant Indus. 

 Bui. 25'), pp. GO, pis. 109, figs. 2). — This bulletin is in continuation of one previ- 

 ously issued (E. S. R., 25, p. 243), and gives detailed descriptions of a large 

 number of plates made in studying this disease, the histological evidence being 

 based upon them. 



[Crown gall on mangolds in England], R. H. Biffen (Jour. Roy. Agr. Soc. 

 England, 12 (1911). p. JT.S, fig. 1). — .V tumor-like outgrowth on the roots of 

 mangolds observed in 1910, and more closely studied in 1911, is found to be a 

 case of crown gall ascribed to Bacterium tumcfacicns. This disease has been 

 certainly identified only in Norfolk and ShroT)shire, but is suspected to exist 

 on raspberi"y I'oots iu Cambridgeshire. Further investigations are contem- 

 plated. 



On two injurious fungi of garden plants, G. Kock (Separate from Bl. Obst, 

 Wcin, (iartcnhau u. Klcinticrzuchi, 1911, A^o. 11, pp. 8). — The author discusses 

 briefly a fungus sent him for examination from Silesia on a species of Erica, 

 supposed by him to be O'idium ericinum, also a myxomycete, said to bo 

 Spumaria alba, found on 3-oung asters and spreading in manure beds. The 

 results of his measurements and observations are also given. 



Treatment of seed wheat for smut (Agr. Gaz. N. 8. Wales, 23 (1912), No. 5, 

 p. 396). — Trials were made with 0.5 per cent. 1 per cent, 1.5 per cent, and 2 per 

 cent solutions of bluestone, and also of the effect of dipping the wheat in 

 limewater afterwards. 



These tests showed that any solution of bluestone stronger than 1.5 per cent 

 is likely to affect seriously the germination of the gi'ain, and even at this 

 strength it is advisable to dip the wheat in a mixture of 1 lb. lime to 20 gal. 

 of water. 



Trials of alleged preventives for smut in wheat (Agr. Gaz. N. 8. Wales, 23 

 (1912), No. 5, p. 39 Jf). — This is a summary of reports from experiments at the 

 Cowra, Wagga, and Bathurst experiment farms with two commercial prepara- 

 tions, claimed to prevent smut iu wheat, as compared with bluestone (2 per 

 cent) and limewater. 



One of these was found to be equal to bluestone as a protective, but both 

 affected the germinating power to a greater extent, so that neither is recom- 

 mended as a substitute for bluestone. 



The diseases of ginseng and their control, H. H. Whetzel and J. Rosen- 

 BAUM (U. 8. Dcpt. Agr., Bur. Plant Indus. Bui. 250, pp. JfJf, pis. 12, figs. 5). — 

 This is a second attempt to bring together the information relating to the 

 diseases of the drug plant known as ginseng, the first publication having been 

 previously noted (B. S. R., 16, p. 271). The data presented on each disease are 

 arranged under the heads of history, pyraiitoms. cause, and control. Among the 



