146 PATHOLOGY [BoT. Absts., Vol. IX, 



927. Lehman, S. G. Soft rot of pepper fruits. Phytopathology 11: 85-87. 1021.— 

 A hitherto unknown rot of sweet pepper (Capsicum annuumvaT.grossum) fruit is described. 

 It appears first as a small water-soaked spot at the blossom end. The infected area enlarges 

 rapidly, becomes lighter in color and soft, and after a period of 4 or 5 days involves the entire 

 fruit. The causal organism is a phycomycete which seems to be identical with Pythium de 

 Baryanum. — B. B. Higgins. 



928. McKat, M. B. Blossom-end rot of tomatoes. Oregon Agric. Exp. Sta. Crop Pest 

 and Hort. Rept. 3 : 185-186. Fig. 52. 1921. — The relation of the disease to water supply, and 

 suggestions for its control are given. — E. J. Kraus. 



929. McKay, M. B. Mosaic disease of tomatoes. Oregon Agric. Exp. Sta. Crop Pest 

 and Hort. Rept. 3: 179-1S4. PI. H, jig. 51-52 1921. — Effects of the disease on foliage and 

 fruit are described. General discussion, notes on occurrence in Oregon, and suggestions for 

 control are presented. — E. J. Kraus. 



930. McKay, M. B. Western yellow tomato blight. Oregon Agric. Exp. Sta. Crop 

 Pest and Hort. Rept. 3: 174-178. Fig. 50. 1921. — Both Fusarium and Rhizoctonia appear 

 to be associated with the disease, though the former seems to be the more common and impor- 

 tant. There are no resistant varieties, but such are being sought. Occurrence and means 

 for decreasing losses are discussed. — E. J. Kraus. 



931. Miles, L. E. The mosaic disease of sugar cane in Mississippi in 1920. Mississippi 

 Agric. Exp. Sta. Bull. 191. 12 p., 1 fig. 1920. — A brief history of the disease is given, its symp- 

 toms, and distribution over the state; quarantine and control measures are also mentioned. — 

 H. B. Brown. 



932. Neal, D. C. Diseases of the sweet potato in Mississippi and their control. Mis- 

 sissippi Agric. Exp. Sta. Bull. 190. 16 p., 12 fig. 1920. — In an illustrated popular bulletin, 

 the author discusses the economic importance of the most common sweet potato diseases, 

 their symptoms, causes, control measures, and distribution over the state. A short bibliogra- 

 phy is appended. — H. B. Brown. 



933. Pritchard, F. J., and W. S. Porte. Collar-rot of tomato. Jour. Agric. Res. 21: 

 179-184. PI. U-^5. 1921. — This disease of tomato (Lycopersicum) takes the form of a rot- 

 ting and girdling of the stem of young plants at the surface of the soil. It is essentially a dis- 

 ease of the seed-bed and occurs in Maryland, New Jersey and Delaware. The disease is caused 

 by Veriicillium lycopersici n. sp.; a technical description is presented. — Infection experiments 

 were made with this fungus in comparison with Macrosporium solani and Rhizoctonia solani. 

 All 3 organisms produce a girdling of stems of seedling tomatoes when applied to the unin- 

 jured stems or when mixed with the potting soil. R. solani often fails to infect and the 

 lesions are superficial. Trials with potato (Solanum tuberosum) and with horse nettle {S. 

 carolinense) show that these plants are also hosts for the 3 organisms with typical collar rot 

 development, but, as with tomato, Rhizoctonia solani is weakly parasitic. — D. Reddick. 



934. Ramirez, Ram6n. Enfermedad en los naranjos de Turicato, Michoacan. [An orange 

 disease in Turicato, Michoacan.] Rev. Agric. [Mexico] 5: 547. 1 fig. 1920. — A rot of oranges 

 due to Penicillium sp., Aspergillus sp. and other molds following initial injury by insects is 

 described. — John A. Stevenson. 



935. Ramirez, Ram6.v. Enfermedad de los pinos de Guadalajara. [A pine disease in 

 Guadalajara.] Rev. Agric. [Mexico] 5: 601. 1 fig. 1920. — A disease of the twigs of Pinus 

 sp. due to Schizotrichuvi sp. is described briefly. — John A. Stevenson. 



936. Ritzema Bos, J. Myn proefveldje by het Instituut voor Phytopathologie van 1906 

 tot 1920. [My experiment field at the Phytopathological Institute during the period 1906-1920.] 

 Tijdschr. Plantenz. 27: 29-44. 1921. — In this work the results obtained upon various phy- 



