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



239. Hartwell, Burt L., and S. C. Damon. A field comparison of hydrated lime with 

 limestone of different degrees of fineness. Rhode Island Agric. Exp. Sta. Bull. 180. 18 p. 

 1919.— See Bot. Absts. 6, Entry 16. 



240. Hartwell, Burt L., F. R. Pember, and G. E. Merkle. The influence of crop plants 

 on those which follow. II. Rhode Island Agric. Exp. Sta. Bull. 176. 47 p. 1919.— See Bot. 

 Absts 6, Entry 18. 



241. Johnston, J. R. La enfermedad "mosaico" de la cafia de azucar. [The mosaic dis- 

 ease of sugar cane.] Ofic. Sanidad Veg. Sec. Agric. Com. y Trab. [Cuba] Circ. 6. 11 p., 3 pi. 

 (colored), 2 jig. 1919. — The author gives a description of the disease together with a brief 

 discussion of its cause, the damage occasioned, varieties of cane attacked, control, and known 

 distribution in Cuba and other countries. The following recommendations are made: (1) 

 That only carefully selected healthy seed be used. (2) On buying seed cane from a distant 

 locality, obtain a certificate from the Office of Plant Sanitation, which guarantees the said 

 cane to be free from infection. (3) Any person desiring to obtain cane for seed from a foreign 

 country for experimental purposes, should request this through mediation of the Department 

 of Agriculture, Commerce and Labor, in accordance with the decree of the Secretary of Agri- 

 culture dated July 16, 1919. This decree prohibits the importation of sugar cane from all 

 countries, except that consigned to the Department of Agriculture and intended for experi- 

 mental purposes, as well as the transportation within the national territory of cane from 

 infected zones to other localities. — S. C. Bruner. 



242. Koch, L. Uitkomsten van een proef met het gebruik van "gedegenereerde" cassave- 

 bibit. [Results of a trial with the use of degenerated cassava cuttings.] Korte Ber. Selectie- 

 en Zaadtuinen voor Rijst en andere eenjarige Inlandsche Landbouwgew., Dept. Landb. Nij- 

 verheid en Handel [Buitenzorg] 12: 1-5. Feb., 1919. — Varieties of cassava imported into East 

 Java from West Java (with moist climate) were reported to degenerate and a trial was made 

 at the Plant Breeding Station for Annual Crops at Buitenzorg to compare the value for propa- 

 gation of these totally degenerated cuttings with cuttings of the same variety that had been 

 grown for more than ten years at Buitenzorg. Although the cuttings were made from a degen- 

 erated crop no difference at all was found between the yields of the degenerated and the nor- 

 mal cassava. The degeneration may result in very low yields. The following percentages 

 indicate the approximate yield of cuttings of several "generations:" — Import, 100; 1st gener- 

 ation, 80; 2nd gen., 65; 3rd gen., 50; 4th gen., 37; 5th gen., 35. In some cases the percentage 

 for the 5th generation was only 20-30. — L. Koch. 



243. Kornauth K., and A. Wober. Versuche zur Bekampfung des roten Brenners 

 und des echten Mehltaues der Reben im Jahre 1917. [Investigations on control of grape diseases 

 caused by Pseudopeziza tracheiphila and Oidium.] Zeitschr. landw. Versuchsw. Osterr. 21: 

 295-312. 1918. — (1) Red leafburn. Treatments made in the spring and at "regular intervals." 

 Bordeaux mixture (1.5 per cent) gave best results. "Bosnapasta" (1.5 per cent) gave nearly 

 as good results. Peroxide (3 per cent) was not so good and lime-sulfur solution (2 per cent 

 by volume) was worthless. Sulfur combined with Bordeaux mixture added nothing. (2) 

 Downy mildew. Soda solution and "antifungin" injured the foliage. Gray sulfur (trade 

 name, "Kreide") gave the most slight odor and taste of tar oil but this disappeared in fer- 

 mentation ; in this respect "melior" and calcium sulfid were worse. Potassium-permanganate- 

 lime mixture gave satisfactory control but sodium thiosulfate proved worthless, as did 

 limesulfur solution, "antifungin" and soda solution. [Through abst. by Matouschek in: 

 Zeitschr. Pflanzenkr. 29: 262. 1919 (1920).]— D. Reddick. 



244. Labrie, L'abbe. Curueux cas d'implantation de cuscute au sommet d'un arbre. 

 [Curious case of implantation of Cuscuta to the top of a tree.] Actes. Soc. Linn. Bordeaux 

 (Proces-verbaux) 69: 57-60. 1915-16. —Cuscula minor D.C., which is usually parasitic on 

 clover, sedges, and grasses, was in one instance found in the top of Viburnum tinus L., three 

 meters from the ground. — W. H. Emig. 



