No. 2, September, 1920] PATHOLOGY 265 



2021. Brunei*, Esteban. La pudricion negra del cacao. [Black rot of the cacao.] Re- 

 vist. Agric. Com. y Trab. 2 : 630. / Jig. 1919. — The black rot of the cacao (Theobroma cacao) 

 caused by the fungus (Phytophthora faberi Maublanc) is reported for the first time from 

 Cuba. The disease is described and methods of control are recommended. — F. M. Blodgett. 



2022. Bunting, R. H. Report of the Mycologist. Rept . Agric. Dept. Gold Coast 1917 : 19- 

 21. 1918. — Progress report of work on diseases of cocoa, coffee, para rubber. — J. I. Lauritzen. 



2023. Butler, E. J. Report of the Imperial Mycologist. Sci. Rept. Agric. Res. Inst., 

 Pusa 1918-19: GS-S5. 1919. — The report records progress made during the year under report 

 in the study in India of: black band of jute (Corchorus) caused by Diplodia corchori; diseases 

 of rosaceous plants in the outer Himalayas; various diseases of chili {Capsicum spp.); Pyth- 

 ium disease of ginger, tobacco {Nicotiana spp.), and Carica papaya; wilt of Cajanus indicus; 

 smut of sugar cane (Saccharum officinarum) ; and wheat rust. Methods of treatment and pre- 

 vention are recommended. — Winfield Dudgeon. 



2024. Call, L. E. Director's Report. Kansas Agric. Exp. Sta. 1917-18. 6S p. 1918*.— 

 Physiological investigations with sorghum (Andropogon sorghum) and corn varieties, showing 

 their comparative drought resistance and water requirements is discussed. Kanred wheat, 

 P1066 and P1068, three hard winter wheats, products of the Kansas Station, have been shown 

 to be very resistant to stem rust, Puccinia graminis tritici. The effect of stem rust on the 

 grain of other varieties grown in the same plots with above wheats, is shown in contrast. A 

 new form of stem rust Puccinia graminis tritici-inficiens is described. Under corn smut 

 (Ustilago zcae) investigations it has been shown that although the smut can be reduced by 

 fungicides, it likewise proportionately reduces the yield. Ecological studies show that 

 infection is local through leaf axils and not systemic. A varietal test of sorghums shows that 

 all are susceptible but milo and feterita. The last named are being studied with a view of 

 discovering what constitutes their resistance. [See also Bot. Absts. 5, Entry 1466.] — L. E. 

 Melchers. 



2025. Chassignol, F. La rouille grillagee du poirier (Roestelia cancellata Rebent.) et 

 le Juniperus sabina L. [The pear rust (Roestelia cancellata Reb.) and Juniperus sabina L.] 

 Bull Soc. Path. Veg. France 6: 133. 1919. — To show the difference in susceptibility of varie- 

 ties the following case is given. Duchess of Angouleme pear 25 meters from a Juniper had 

 about one-third of its leaves attacked by the Roestelia, while an unknown variety only 20 

 meters from the tree had only four or five leaves affected. — C. L. Shear. 



2026. Coker, W. C. A parasitic blue-green alga. Jour. Elisha Mitchell Sci. Soc. 35: 9. 

 1919. — Given at the Eighteenth Meeting of the North Carolina Academy of Science, and 

 abstracted in its Proceedings. Oogonia of Saprolegnia anisospora were found to be infected 

 by a species of blue-green alga which destroyed the eggs within. — W. C. Coker. 



2027. Cotton, A. D. Clover stem-rot (Sclerotinia trifoliorum) . [Rev. of: Amos, A. 

 Clover stem-rot. Jour. Roy. Agric. Soc. England 79: 68-88.] Jour. Ministry Agric. Great 

 Britain 26: 1241-1244. 1920. 



2028. Cotton, A. D., and M. N. Owen. The white rot disease of onion bulbs. Jour. 

 Ministry Agric. Great Britain 26: 1093-1099. 1920. — The white rot disease of onions, very 

 widespread in England and known to occur in Scotland and Ireland, causes considerable dam- 

 age to the onion crop, especially in market gardens and allotments, and is caused by Sclero- 

 tium cepivorum. It attacks both spring and autumn sown onions and is most in evidence 

 from the beginning of June to early August. Few infections appear to take place after that 

 date. In attacked plants the leaves turn yellow, wilt, fall over, and finally the entire plant 

 collapses and is easily pulled from the ground. Under warm, moist conditions a fluffy, white 

 mycelium develops round the base of the bulb which is very characteristic of the White Rot 

 disease and distinguishes it at once from all other diseases of the onion. A little later the 



