646 EXPERIMENT STATION RECORD. 



possibility of pnrifying seedlings of wheat or other cereals so that physiological 

 or other experiments may be carried on with wheat plants that are known to 

 be internally free from disease-producing organisms. 



The possibilities of disease resistance in cabbage, L. R. Jones (Abs. in 

 Phytopathology, 3 (1913), No. 1, p. 71). — Experiments for the control of dis- 

 eases of cabbage have been in progress for a number of years which have failed 

 to discover any specific remedy. On the other hand, the possibilities of devel- 

 oping disease-resistant strains are said to be encouraging. Plants selected 

 from different fields showed some resistance, and when seed from these was 

 sown in 1911 and 1912 in soil badly infected with the yellows disease a high 

 degree of resistance was shown in every instance, the best giving 98 per cent 

 of plants, 93 per cent of which headed. 



Sclerotinia on chicory (Rev. Hort. Beige, 39 (1913), No. 10, pp. 187-189, 

 pis. 2). — A description is given of a disease of chicory ascribed to Sclerotinia 

 sp., said to infest ground used for beet culture. The fungus is favored in its 

 activity by heat, humidity, and poor aeration. No curative treatment is 

 offered, but cautious use of lime and potash fertilizers is suggested. The early 

 removal and destruction of all affected plants is recommended. 



The small lettuce Sclerotinia, an iindescribed species, I. C. Jagger (Abs. in 

 Phytopathology, 3 (1913), No. 1, p. 7^). — The author claims that the fungus 

 described by Smith as occurring on greenhouse lettuce (E. S. R., 12, p. 764) is 

 an undescribed species clearly distinct from 8. Iibe7-tiana. 



A disease of peanut plants caused by Bacterium solanacearum, H. R. Ful- 

 ton and J. R. Winston (Abs. in Phytopathology, 3 ( 1913), No. 1, pp. 72. 73).— 

 The authors claim that cross inoculations with strains of bacteria causing the 

 bacterial wilt of tobacco have shown that this organism will produce a disease 

 of peanut plants. 



Leaf roll, curly leaf, and other new potato diseases, W. A. Oeton (Abs. in 

 Phytopathology, 3 (1913), No. 1, p. 69). — The author points out some of the 

 differentiating characteristics of Fusarium wilt due to F. oxysporum, Verticil- 

 lium wilt caused by V. albo-atrum, leaf roll disease, curly leaf, rosette, etc. 

 Descriptions are given of mosaic and streak, two potato diseases not hitherto 

 described. 



Important potato diseases, G. KocK (Monatsh. Landw., 6 (1913), No. 7, pp. 

 211-214. fig. 2). — The author describes some of the more important diseases of 

 potatoes with a view to their ready recognition in the field, such as Phytoph- 

 thora, Alternaria solani, leaf roll, frizzle disease, blackgleg, and yellows. 



Resting' mycelia of Phytophthora and other related species, I. E. Melhus 

 (Abs. in Phytopathology, 3 (1913), No. 1, p. 70). — Experiments are said to have 

 shown that the mycelium in Phytophthora infected tubers can spread from the 

 tuber into the sprouts when placed in a warm, saturated atmosphere, and that 

 the stems of plants growing from such tubers may become infected from below 

 upward. The mycelia of several other species closely related to Phytophthora 

 are said to be able to function in the same manner. 



Employment of flowers of sulphur as protection against potato scab and 

 as indirect fertilizer, H. von Feujtzen (Fiihling's Landw. Ztg., 62 (1913), 

 No. 7, pp. 231-242). — Besides an account of previous investigations by others. 

 the author gives the result of his own experiments in employing powdered 

 sulphur with potatoes planted in 1911 and 1912 on land previously producing 

 scabby tubers. In case of one variety (Juhel), the results were decidedly 

 beneficial, while in most of the others the advantage was either small or negative. 



Damping-ofE and root rot parasites of sugar beets, H. A. Edson (Abs. in 

 Phytopathology, 3 (1913), No. 1, p. 76). — A progress report was presented of a 



