642 EXPERIMENT STATION EECORD. 



mens, Ophiobolus graminis was abundant. Fusarium ruhiginosum, it is claimed, 

 is almost consfjiutly present in this disease. It is thonglit tliat foot rot of 

 cereals may be considered due to tlie attack of such fungi as Ophiobolus and 

 Leptospha-rla on the one Jiand and to various species of Fusarium on the other. 

 Some discussion of the fructification of these fungi is also given. 



Rust in the interior of graminaceous seeds, J. Bkauvkrie (Rev. G6n. Bot., 

 25 his (1914), pp. 11-21, figs. 10). — In continuation of work previously refwrted 

 (E. S. R., 30, p. 241), the author states tliat within the seed coats of several 

 wild or cultivated grains he has found the fruiting bodies and the mycelium of 

 rusts. This occurrence is very frequent in certain species, as Puccinia glumarum 

 in barley, and other rusts in Agropgron spp., Br achy podium pinnatum, etc. P. 

 graminis is soniotiuies found in this relation on wheat. 



Fung'us diseases of cotton, Jj. Smith (Rpt. Agr. E.rpt. Sta. ^t. Croix, 1912-13, 

 pp. 59, 60). — It is stated that while tlie usual attacks of angular leaf spot, 

 round spot, rust, and mildew of cotton are observed to do but little harm here, 

 a much more serious case is that caused by a fungus which attacks young bolls 

 almost to the time of their maturity. The trouble is thought to be due to a 

 Macrosporium, possibly M. nigricantium, which is said to be associated with 

 black rust of cotton in the United States. 



A disease causing a blistered and torn appearance of young leaves and abor- 

 tion and blackening of young flower buds is thought to be practically identical 

 with tliat described by Cook (E. S. R., 29, p. 47) as causing a physiological dis- 

 order of cotton in the United States, differences in details as to manifestations 

 being ascribed to differences in local conditions. 



Spraying of peanuts for leaf rust (Agr. News [Barbados], 13 (1914), No. 

 328, p. 380). — Bordeaux mixture sprayed, on twice (63 and 77 days after plant- 

 ing) under 80 lbs. pressure is considered to have given an increase of 42 per 

 cent in tlie sprayed as compared with the unsprayed plat in the case of the 

 Gambia variety of peanuts affected with Uredo aracliidis. 



Notes on miscellaneous potato diseases, F. D. Bailey (Oregon Sta. Bien. 

 Crop Pest and Hort. Rpt. 1913-14. pp. 2^5-256, figs. 9). — Notes are given on 

 investigations of various potato diseases in Oregon. Among these are several 

 storage rots, the powdery dry rot due to Fusarium trichothecioides, dry rot due 

 to F. cwruleum, and jelly-end rot caused by F. orthoceras. Notes are also given 

 on silver scurf, early blight, Verticillium wilt, mushroom root rot, and Rhizoc- 

 ionia violacea, with suggestions for their control. 



Brief accounts are also presented on the curly dwarf and internal browning 

 of tubers due to nonparasitic causes. 



Potato spraying experiments, F. D. Bailey (Oregon Sta. Bien. Crop Pest 

 and Hort. Rpt. 1913-14, pp. 251-2G0, fig. 1). — Accounts are given of spraying 

 experiments for the control of late blight of potatoes, which is said to be occa- 

 sionally a serious menace in the western part of the State. 



The results of the use of Bordeaux mixture and arsenate of lead for the con- 

 trol of this disease anti insect pests show in one instance an increased yield of 

 44.4 per cent where no late blight was present. Experiments for two years in 

 another locality showed that the late blight could be effectively controlletl by 

 Bordeaux mixture. When blight appeared a month before harvest, the yield 

 was increasetl in one case 4G bu. per acre and in another 203 bu. when the plants 

 were sprayed. 



Leaf roll of potato, VIH, G. KoCK, K. Kornaxjth. and O. Broz (Ztschr.' 

 Landw. Versuchsw. Osterr., 17 (1914), No. 5, pp. 270-300) .—This continues 

 recent reports on the study of potato leaf roll by the committee, as noted by 

 these authors (E. S. R., 30, p. 243) and by Reitmair (E. S. R., 30, p. 48). 



