No. 1, July, 1920] PATHOLOGY L93 



12C)S. (\>v.Hvi:u, Jm.oki;\(:bM. Bacterial blight of soybean. Jour. Agrii 18:179 

 Plate A (colored) and 18-18, 1 fig. L919. Soybean, G [ad on, Wisconsin, 



is subject to an undescribed disease. Lesion on leave oall, an| either 



lated or confluent. Ai first tiny. -in- Light-colored and translucenl l>ut later become very <l;trk. 

 The affected i issue maj become dry and drop out giving the lea^ I appearance. Le- 



sions occur also on petiole, stem and pod. 1 1 ed by Bad 



which is able i<> make i utrance withoul wounds. The organism is a medium-sized r<>d, motile 

 by from I to several polar Bagella. Its cultural charactei anted in • 1 < - 1 -l i i . i 



group number assigned is 222.2223032; optimum growth 21 to 26°, maximum 36°, minimum, 

 under 2°. Infection is secured by spraying water suapi '>f the organism upon plant*. 



— D. Reddick. 



1269. Cotton, A. D. Potato diseases. Jour. Bd. Agric. Greal Britain BuppL 18:28 



Fig. 1-18. 1919. — A brief popular description including control measures ifl given of all the 



diseases that affect potatoes in Britain. — M. B. McKay. 



1270. Cotton, A. D., and H. V. Taylor. The causes of decay in potato clamps, with spe- 

 cial reference to the season 1918. Jour. Bd. Agric. Greal Britain Buppl. 18: Is 60. Fig. 10. 

 1919. — An exceptional amount of rotting potatoes in clamps in Britain occurred in 191S-19 

 due to the following most frequent and most important causes which are briefly discusf 



(1) Blight rot due to Phytophthora infestans: wet rots due to bacterial decay of tubers 2 

 flooded or waterlogged previous to clamping, (3) injured by frost previous to clamping, 

 affected by blackleg bacillus (B. atrosepicus) , (5) brought about by the heating of 

 clamp, or (6) as a result of the penetration of the clamp by frost; and (7) a dry rot due to 

 Fusarvum caeruleum. — Suggested methods of control include the clamping of only sound tu- 

 bers, care in the construction of the clamp, the provision of ample ventilation, and periodical 

 inspections of the clamp to detect and check any unfavorable developments. — M.B. McR 



1271. Crocker, William. Wound callus and bacteria tumor. [Rev. of: M \ tnra, Wer- 

 ner. Wund-Callus und Bakterien-Tumore. Ber. Deutsch. Bot. Ges. 36: 20-29. 1918 (See 

 Bot. Absts. 2, Entry 610).] Bot. Gaz. 67: 516-517. 1919. 



1272. Dana, B. F. A preliminary note on foot-rot of cereals in the Northwest. Science 

 50: 484-485. Nov., 1919. — The disease in question was first observed on wheat growing at 

 Olympia, Washington. The infected plants, showing elliptical lesions at the base of the 

 stem had dead roots at the first node, and were sickly in growth as well as yellow in color. 

 Later reports, especially from Cowlitz County, show-ed that the same disease was respon 



for uneven stands with considerable lodging. The disease has since been reported from t 

 eral other counties. Microscopic examination of the fungus showed that the mycelium agrees 

 fairly well with Rhizoctonia Solani Kuhn., except that the hyphae are only about one hall 

 large. No fruiting stage of the fungus has been connected with the sterile stage on the culms 

 of the cereals. There seems to be a close similarity between the disease as it occurs in Wash- 

 ington, and the foot-rot of cereals caused by Ophiobolus graminis Sacc, as described by 

 McAlpine and others. — A. H. Chivers. 



1273. Department of Horticulture, Purdue University, Experiment Station. 

 Apple spraying and spray materials. Trans. Indiana Hortic. Soc. 1918:355-363. 1919. — Di- 

 rections for preparation and application of sprays. 



1274. Doidoe, Ethel M. Diseases of stone fruit trees. 2. Freckle or scab (Cladospor- 

 ium carpophilum Thum). South African Fruit Grower 6: 271-273. 1 fig. 1919. 



1275. Doidge, Ethel M. Diseases of stone fruit trees. 3. Brown rot or fruit mold, 

 Sclerotinia fructigena (Pers.) Schroet. South African Fruit Grower 6: 305. 1919. 



BOTANICAL ABSTBACTS, VOL. IV, NO. 1 



