196 PATHOLOGY [BoT. Absts., Vol. X, 



Sclerotium oryzae attacks the leaf-sheaths and stems, causing considerable damage during the 

 ripening season. The sclerotia are spherical to elliptical and more irregular than in the 

 preceding species ; the colors are similar. — Lime-Bordeaux mixture and kerosene were ineffective 

 in checking any of these diseases. Lye from wood ashes checked the mycelial development of 

 the first species only. Lime, unless used in large quantities and for long periods, was ineffec- 

 tive. The destruction of the sclerotia by piling the diseased straw with barnyard manure to 

 permit fermentation is recommended as a preventive measure in all cases. Where a tempera- 

 ture of 40°C. is reached 4-7 days are necessary; at 50°C., 30-60 minutes are sufficient; at 60°C., 

 10 minutes suffice. In addition, application of wood ashes or of lime to fields containing dis- 

 eased plants is desirable. — Masao Yoshikawa. 



1298. Selby, A. D., AND R.C.Thomas. Impairment of clover seedings reported. Monthly 

 Bull. Ohio Agric. Exp. Sta. 6: 90-92. 1921. — This article comprises a preliminary report of a 

 root-rot disease of red clover in Ohio. Fusarium sp. has consistently been associated with the 

 disease. — R. C. Thomas. 



1299. Thurston, H. W., Jr., and C. R. Orton. A Phytophthora parasite on peony. Sci- 

 ence 54: 170-171. 1921. — Blighted peonies from Pennsylvania proved to be infected with a 

 Phytophthora which has not yet been determined. The disease manifests itself as a necrotic 

 condition of buds, surrounding leaves, and stem; infected areas are dark brown or black. 

 Cultural characteristics are given. Zoosporangia are abundant and measure 16.7-22.3 X 20.4 

 —29.7 m; oospores have not been observed. — C. J. Lyon. 



1300. Wakefield, E. M. Diseases of the oil palm in West Africa. Agric. Bull. Federated 

 Malay States 8: 244-246. 1920 [1921]. [Reprinted from Kew Bull. 1920: 306-308. 1920.] 

 An account of the diseases of Elaeis guineensis. — /. H. Burkill. 



1301. Weir, James R. Notes on Cenangium abietis (Pers.) Rehm on Pinus ponderosa 

 Laws. Phytopathology 11: 166-170. Fig. 1-2. 1921. — Cenangium abietis has been found 

 attacking young trees of Pinus ponderosa in the Bitterroot Valley, Montana. Apparently 

 infection takes place in all cases through the terminal bud during late fall, and in most cases 

 only the new growth is affected. The needles of infected twigs turn red during the winter, and 

 drop during the following spring and summer, the twigs dying. In some cases where every 

 terminal on a tree was thus killed the tree died before the end of summer. — Results from 

 inoculations indicate that the fungus is parasitic, but is not very aggressive in spreading. — 

 B. B. Higgins. 



1302. Weir, James R. Pol3rporus schweinitzii Fr. on Thuja plicata. Phytopathology 11: 

 176. 1921. — A sporophore of Polyporus schweinitzii was found arisin-? from the decayed heart 

 wood of a living root of Thuja plicata. The rot extended up into the base of the tree and was 

 uniform throughout the affected area, which indicates that this fungus is not the cause of the 

 brown pocket rot often attributed to it. — B. B. Higgins. 



ERADICATION AND CONTROL MEASURES 



1303. BiSBT, G. R. The cooperative potato spraying projects : Progress report for 1918, 1919, 

 and 1920. Phytopathology 11: 178-193. 1921.— Following the suggestion of the War Emer- 

 gency Board in 1918, a cooperative potato spraying experiment was undertaken. The author 

 gives the plan of the proposed experiments to be carried out at various experiment stations 

 throughout the U. S. A. and Canada, and also a summary of the work already completed and 

 reported in publications or to him personally. — B. B. Higgins. 



1304. Blair, R. J. Decay in pulpwood-deterioration in pulp. Paper Indust. 2: 95-98. 

 Fig. 1-2. 1920. — The causes of decay in pulpwood and in pulp are discussed, and a detailed 

 outline of an investigation of these causes is given. — H. N . Lee. 



