284 PATHOLOGY [Bot. Absts., Vol. VI, 



1959. Schoevers, T. A. C. Ziekten van aardappel knollen. [Diseases of potato tubers.] 

 Tijdschr. Plantenz. 26: 5-20. 3 pi., 13 fig. 1920. — A brief description of twenty diseases 

 affecting the tubers of potato. The symptoms, especially those exhibited by the tubers, are 

 described, and standard methods for control are given. Among the diseases described are: 

 Rhizoclonia disease, Wart, Fusarium rot, scab, tuber proliferation, bacterial soft rot, red rot, 

 Phytophthora rot, ring necrosis, silver scurf, Verticillium disease, nematode disease, hollow- 

 ness, and powdery scab. Half-tone illustrations of many of the diseases and a key for deter- 

 mining the diseases from an examination of the tubers, accompany the text. — H. H. Whetzel. 



1960. Schreiner, Oswald, B. E. Brown, J. J. Skinner, and M. Shapovalov. Crop in- 

 jury by borax in fertilizers. U. S. Dept. Agric. Dept. Circ. 84: 35p. 25 fig. 1920. — See Bot. 

 Absts. 6, Entry 1431. 



1961. Stager, R. Beitrag zur Verbreitungsbiologie der Claviceps-Sklerotien. [Dis- 

 semination of Claviceps sclerotia.] Verh. Schweizer Naturw. Gesell. 99: 236-237. 1918. — 

 Sclerotia of Claviceps do not simply fall to the ground and lie there until the following spring. 

 They may be spread widely with the host (sclerotia from Brachy podium, Agropyrum, Lolium, 

 Arrhenatherum elatius, and Alopecurus myosuroides) ; they may be disseminated by the in- 

 herent condition of low specific gravity which allows them to float on water (sclerotia from 

 Molinia coerulea, Glycerina flxritans, Phalaris and Phragmites) ; they may be distributed by a 

 union of the distribution apparatus of host and parasite to mutual advantage (as in case of 

 species of Holcus, Poa nemoralis, P. annua and Dactylis glomerata); with sclerotia of low 

 specific gravity, wind transport is possible. A combination of wind and water movement 

 exists for sclerotia from Phragmites and Calamagrostis arundinacea. [Through abst. by 

 Matouschek in: Zentbl. gesamte Landw. 1, Entry 355. 1919.] — D. Reddick. 



1962. Stehlik, W. Bekampfung des Wurzelbrandes bei der Zuckerriibe durch ihre Ziich- 

 tung. [Control of sugar beet root-rot by breeding.] Ost-Ung. Zeitschr. Zuckerind. u. Landw. 

 47: 1-10. 1918.— [Abst. by Molz in: Zentralbl. gesamte Landw. 1, Entry 277. 1920.] 



1963. Taubenhaus, J. J. Diseases of greenhouse crops and their control. Dutton & 

 Co. : New York, 1920. 



1964. Thornber, J. J. Plant disease inquiries. Arizona Agric. Exp. Sta. Rept. 1917: 

 431-432. 1918. — A short list of diseases occurring in Arizona in 1917. — D. Reddick. 



1965. Valleatj, W. D. Seed corn infection with Fusarium moniliforme and its relation to 

 root and stalk rots. Kentucky Agric. Exp. Sta. Bull. 226: 25-51. Fig. 1. 1920. — An exami- 

 nation to determine the seed-borne organisms in seed of Zea Mays L. which might cause 

 root and stalk rots of corn resulted in finding Fusarium moniliforme Sheldon in all samples of 

 corn examined from the states of Kentucky, Kansas, Arkansas, Missouri, Tennessee, Georgia, 

 Mississippi and Minnesota. No disease-free ears were found, and practically one hundred 

 per cent infection of kernels on an ear was the rule. Infection on an ear was found not to be 

 localized. The high degree of seed infection probably explains the equally extensive root 

 infection under field conditions. The rag doll and other germinators in which seedlings were 

 grown only to a height of 3 or 4 inches were of little value in determining the extent of kernel 

 infection on an ear. Sand germinators in which the seedlings were grown to a height of 12 to 

 22 inches were used, the seedlings being removed and washed and the roots and stems exam- 

 ined for lesions. The development of pink, scarlet, purple, or black discolorations within 

 the seed coats, in any type of germinator indicated infection with F. moniliforme. Pink dis- 

 colorations on dry white kernels are an indication of infection. Isolations from rotting roots 

 and stalks in the field yielded F . moniliforme in the majority of cases. Infection with F. 

 moniliforme generally has little effect on the germination or early vigor of the resulting 

 seedling. — W. D. Valleau. 



