282 PATHOLOGY [Bot. Absts., Vol. VI, 



1944. Fryer, Percival J. Insect pests and fungus diseases of fruit and hops, xv + 728 

 p., 24 pi. University Press: Cambridge, England, 1920. 



1945. Gunderson, A. J. Some facts about dry lime-sulphur. Better Fruit 14 10 :42. 

 1920. — This is a detailed account of the spraying and killing efficiency of dry lime-sulphur 

 as compared with ordinary boiled lime sulphur. The chemical composition of dry lime-sul- 

 phur is considered in detail. — A. E. Murneek. 



1946. Heinsius, H. W. Kort verslag van de algemeene vergadering op vrijdag 20 juni 1919, 

 in den hortus botanicus te Amsterdam. [Secretary's report of the annual meeting of the Phyto- 

 pathological Society of Holland.'! Tijdschr. Plantenz. 25: 202-204. 1919. 



1947. Hiley, W. E. The fungal diseases of the common larch, 8 vo., xii -f- 204 P-, 73 pi. 

 Clarendon Press: Oxford, 1920. 



1948. Kuhr, C. A. H. von Wolzogen. Het zure bibitrot bij het suikerriet. [Sour 

 cutting-rot of sugar cane.] Arch. Suikerindust. in Nederlandsch-Indie' 28:703-756. 24 fig. 

 1920. Also, Mededeel. Proefstat. Java Suikerindust. Landb. Ser. 1920, No. 3. — The sour cut- 

 ting-rot retards or kills small scattered areas in the young cane fields, giving an appearance 

 similar to damage resulting from the "pineapple" disease. The interior of affected cuttings 

 shows a red to brown discoloration in more or less irregularly scattered patches and has a sour 

 odor. The affected cutting is found to be at first acid, but later in the course of the fermen- 

 tation it is alkaline, doubtless through ammonia production. The initial process is typically 

 an acetic acid fermentation, though in exceptional cases of poor soil aeration lactic and 

 butyric acid fermentations occur. A number of different bacteria were cultivated from sap 

 expressed from affected cuttings, and their fermenting ability was studied in vitro. Isolation 

 of a specific organism was not attempted, and controlled inoculation experiments were not 

 made. The writer believes that the fermentation of the cuttings is caused by common soil 

 bacteria, and that the harmful effect on the plant is due to the absorption from the cutting of 

 the acids produced in the fermentation occurring before the roots become well enough estab- 

 lished to make the plant independent of the cutting. For control the writer recommends the 

 improvement of all conditions which further the rapid germination and establishment of the 

 plantlets on their own roots. — R. D. Rands. 



1949. Mann, Harold H., S. D. Nagpurkar, and G. S. Kulkorni. The "Tambera" 

 disease of potato. Agric. Jour. India 15: 282-288. 4 pis. 1920. — The disease which prevailed 

 in the Poona district of western India, known locally as "Tambera," was found to be caused 

 by mites. A description of the affected plants is given, and remedies are suggested. — J. J. 

 Sh inner. 



1950. Meier, F. C. Control of watermelon anthracnose by spraying. U. S. Dept. Agric. 

 Dept. Circ. 90: 3-11. 8 fig. 1920. — "The most practicable method of reducing the damage 

 done by anthracnose is to spray the watermelon vines with 4-4-50 bordeaux mixture." This 

 operation will also help to control other diseases of the crop. Directions are given regarding 

 time and manner of spraying and for the preparation of bordeaux. The disease is described, 

 and the method by which the causal fungus (Colletotrichum lagenarium) is spread is discussed. 

 — L. R. Hesler. 



1951. Nicolas, G. Sur la respiration des plantes parasitees par des champignons. [The 

 respiration of plants parasitized by fungi.] Compt. Rend. Acad. Sci. Paris 170: 750-752. 

 1920. — A comparison of the carbon dioxide-oxygen ratio of sound and diseased specimens 

 of five genera of angiosperms. Seven genera of fungi were involved as disease-producing 

 organisms. It is found that the respiration of organs parasitized with endophytes, such as 

 rusts and Cystopus, and by subcuticular fungi, such as Taphrina, is greater than that of sound 

 organs. The reverse is true of organs attacked by ectophytes, such as mildew. C. H. and 

 W. K. Farr. 



