540 EXPERIMENT STATION RECORD. [Vol.43 



Rust in seed wheat and its relation to seedling infection, C. W. Hungeb- 



FOUD {Jour. Agr. Research [(/. S.], 19 (1920), No. 6, pp. 257-278, pis. 11, fig. ' 

 1). — The author reports iu a contribution from the Bureau of Plant Industry, 

 U. S. Department of Agriailture, the occurrence of uredinia and telia of Pucci- 

 nia gruminis tritici embedded in the pericaxp on the hilar end of wheat kernels 

 and sometimes along the ventral groove as far up as the middle of the kernel. 

 Only a small percentage of infection was found by examination of liundreds of 

 samples of wheat from the crops of 1915 and 1916. Infection is believed to 

 spread to the kei'nel from original infection occurring on the racliis, racliilla, 

 or glumes. The germinating power of the seed was not impaired by the rust 

 infection. When rusted kernels of wheat were sown in the field, the rust infec- 

 tion that occuri-ed on the resulting plants was no earlier or more severe than 

 that occurring on plants grown in adjacent plats sown with clean seed or rust- 

 infected seed treated with the modified hot water treatment. 



A study was made in the pathological greenhouse at the University of Wis- 

 consin of more than 2,500 plants grown from rusted seed and no infection ap- 

 peared at any time. No spread of Infection from the pericarp to the young 

 plant was found, although the infected seed were germinated under various 

 conditions, simulating as nearly as possible natui'al conditions in the field. 

 Tlie author claims that the results of his experimental work indicate that stem 

 rust is not transmitted from one wheat crop to the next by means of infected 

 seed grain. 



Barberry eradication, A. N. Hume and H. C. Gilbert {S. Dak. Agr. Col. 

 Ext. Circ. 33 {1920), pp. 2^, figs. 12). — This circular is a report on the work of 

 barberry eradication during the two years in which it has been carried on, with 

 notes on the black stem rust, the statements and figures given being for South 

 Dakota unless otherwise stated. The work is cooperative between the U. S. 

 Department of Agriculture, Office of Cereal Investigations, and the South 

 Dakota College. An account is given of gi'ain rusts in South Dakota, particu- 

 larly black stem rust (Puccinia graminis tritici), which overwinters in the 

 black spore stage and infects the barberry. 



The work done against barberry is outlined or tabulated with discussion. It 

 is thought that four years or more will be required to complete the eradication 

 of black stem wheat rust from South Dakota. 



The barberry and its relation to the stem rust of wheat in Indiana, F. J. 

 PiPAL {Proc. Ind. Acad. Sci., 1918, pp. 63-70, figs. 2). — An account is given of 

 the relation of wheat rust incidence to barberry in Indiana. 



GlcEOsporiuni lindeniuthianuni in the Princess bean, A. M. Sprengeb 

 (Tijdschr. Plant eiizickten, 21^ (1918), No. 6, Bijbl, p. 20).— Brief discussion is 

 given of Bordeaux mixture and formaldehyde as a defense against G. linde- 

 muthianum attacking Princess bean. This bean is apparently identical with 

 u variety of Phaseolus vulgaris mentioned in connection with the same dis- 

 ease and fungicides by Schenk (E. S. R., 39, p. 249.) 



Crucifer diseases, J. II. Bos {Tijdschr. Plantenziekten, 27/ {1918), No. 6, 

 Bijbl., pp. 26-35, figs. 3). — Discussion is given of finger-and-toe of cx-ucifers, 

 which is believed by the author to be carried in the soil and not on the seed. 



The effects of potato leaf roll, C. S. Wennink {Tijdschr. Plant ensiekten, 

 2Jt {1918), No. 6, Bijbl., pp. 1-4, figs. 5). — This shows the deterioration of tuber 

 output by potatoes affected with leaf roll. 



Transmission of the mosaic disease of Irish potatoes, E. S. Schultz and 

 D. FoLSOM {Jour. Agr. Research [U. S.], 19 {1920), No. 7, pp. 315-338, pis. 8).— 

 In continuation of a previous report (E. S. R., 42^ p. 47), the authors give fur- 

 ther data regarding experiments carried on cooperatively between the Bureau 

 of Plant Industry, U. S. Department of Agriculture and the Maine Experiment 



