190 PATHOLOGY [Bot. Absts.. Vol. IV, 



1248. Brio li, J. Zur Feststellung der Ustilago nuda im embryo der Gerste. [Determina- 

 tion of U. n. in the embryo of barley.] Fiihl. Landw. Zeitg. 67: 336-337. 1918.— Mycelium of 

 U. nuda is easily detected in the scutellum where it is abundant. The difficult part is to get 

 thin sect-ions. To do this remove seed coat with scalpel and cut off a tangential section 5 

 mm. deep. Then make thin sections with razor. Mount sections in concentrated solution 

 of chloral hydrate. — It is thus possible to secure infected but viable seed for experimental 

 purposes. — Affected barley tissue transferred to slices of potato yields a fungus which appar- 

 ently is U. nuda, but it has not been transferred back to barley. — For infection work pot grown 

 barley which is nearly ready to bloom is placed in cool shady place for a few days. When it 

 is brought into the sun many blossoms open within an hour. — D. Reddick. 



1249. Brittain, W. H. Spraying and dusting experiments, 1918. Fruit Growers' Assoc. 

 Nova Scotia Ann. Rept. 55: 102-110. 1919. — The work of four years on apple trees (Pyrus 

 Mains) is summarized. Spraying with lime sulphur (1.009 sp. gr.) four times may cause 66 

 to 75 per cent of the fruit to drop and injure 41 per cent of the foliage of certain varieties such 

 as King, Baldwin, Ben Davis, while on others, like Russet, no injury is apparent. The in- 

 jury is non-existent in some seasons. Most damage is done by the fourth spray (after the 

 fruit is set). In a comparison of sulphur dust with liquid spray the percentage of apples 

 free from scab (Vcnturia inaequalis) is 96 and 99 per cent respectively, and of apples free from 

 all blemishes, 56 and 73 per cent respectively, the difference in the latter case being due to 

 attacks of sucking insects. The following sprays are recommended: (1) Bordeaux mixture 

 (7:7:100); (2) Soluble sulphur; (3) Same as ( 1 ).—Paul A. Murphy. 



1250. Brittlebank, C. C. II. — Tomato diseases Jour. Dept. Agric. Victoria 17: 498- 

 500. 1919. — Leaf spot of tomatoes, Septoria lycopersici is described. The signs of the dis- 

 ease, its method of spreading and control measures are discussed. — /. /. Skinner. 



1251. Brittlebank, C. C. Diseases of plants new to Victoria. Jour. Dept. Agric. 

 Victoria 17: 626-629. PI. 1-2. 1919. — The anthracnose of lettuce caused by Marssonina 

 panatonniana and Botrytis and Sclerotinia diseases of the passion vine are described and 

 control measures given. These were first noted in Victoria in 1916. — J. J. Skinner. 



1252. Brock, W. S. Five years' experimental work in dusting apples. Trans. Indiana 

 Hortic. Soc. 1918: 150-156. 1 fig. 1919. — Development of dusting is traced. Scab and blotch 

 are not controlled. Dusting is more expensive than spraying because of cost of materials. 

 Dusting is advisable for very large orchards, for orchards where diseases are not serious, as 

 a supplementary protection, and for the peach grower. Discussion centers about amount of 

 dust applied per tree and spray gun vs. dust. — Max W. Gardner. 



1253. Brock, W. S. Apple blotch control. Trans. Indiana Hortic. Soc. 1918: 103-111. 

 1919. — The geographical distribution and economic importance of the disease in Indiana and 

 Illinois and the life history of the causal fungus are reviewed. Spores are exuded between 

 3 and 4 weeks after the petals fall. Spraying should begin 3 weeks after the petals fall. Lime- 

 sulphur solution or Bordeaux 3:4: 50 should be used. In the discussion the questions of dor- 

 mant spray for blotch, exact time of spray application, effect of fertilizer, effect of pruning, 

 Bordeaux vs. lime-sulphur are considered. — Max W. Gardner. 



1254. Brooks, Charles, J. S. Cooley, and D. F. Fisher. Nature and control of apple 

 scald. Jour. Agric. Res. 18: 211-240. 1919.— See Bot. Absts. 4, Entry 1617. 



1255. Brooks, F. T. Report on the potato spraying trials, 1918. Jour. Bd. Agric. Great 

 Britain Suppl. 18: 63-68. 1919. — Cooperative trials were carried on in many localities under 

 a wide variety of conditions to obtain more explicit information on the value of spraying with 

 Bordeaux mixture in different parts of the country, as a means of controlling potato blight 

 ( Phytophlhora infcstans). Generally the average gain of sound tubers in favor of plots sprayed 

 more than once was about 1.5 tons per acre. Three sprayings gave the best results and two 

 sprayings were superior to one in most cases. No appreciable increase of sound tubers was 



