64 PATHOLOGY [Box. Absts., Vol. IX, 



the cause is unknown. Transfer of the infection takes place through agency of plant lice. 

 Artificial inoculations have failed; soil infection seems to be excluded. Some strains are 

 resistant, others are not; selection of resistant plants is advisable. — J . C. Th. Uphof. 



424. Yeh, Yuen Ting. [Translation of: Cook, O. F. A disorder of cotton plants in 

 China: Club-leaf or Cyrtosis. Jour. Heredity 11: 99-110. 1920 (see Bot. Absts. 8, Entry 

 532).] Hua-Shang-Sha-Chang-Lien-Ho-Hui-Ki-Kan [China Cotton Jour.] 22; 235-240. Fig. 

 1-10. 1921. 



ERADICATION AND CONTROL METHODS 



425. Anonymous. Calendario para los tratamientos preventivos y curatives de las plantas. 

 [Calendar of preventive treatments and remedies for plant diseases.] Defensa Agric. [Uruguay] 

 1: Gl-64. 1920. — Treatments recommended for pests and fungous diseases of pear, apple, 

 plum, and other fruits are outlined. — John A. Stevenson. 



426. Anonymous. Cura de las semillas de triga. [Treatment of seed wheat.] Defensa 

 Agric. [Uruguay] 1: 115-119. 6 fig. 1920. — The paper outlines copper sulphate and formalin 

 treatments of seed wheat as smut preventives. — John A. Stevenson. 



427. Anonymous. The inspection of potato crops during 1920. Jour. Ministry Agric. 

 Great Britain 27: 954-957. 1921. 



428. Anonymous. E mildiou o bianco de los zapallos. [Cucumber mildew.] Defensa 

 Agric. [Uruguay] 1: 12-13. 1920. — Bordeaux treatment is advised for powdery mildew (Oi- 

 <Hum sp.) of cucumbers. — John A. Stevenson. 



429. Berg, R. C. van den, Rzn. Ontsmettingsproef tegen steenbrand by tarwe. [Treat- 

 ing wheat against stinking smut.] Tijdschr. Plantenz. 27: 17-19. 1921. — In this experiment 125 

 1. of wheat, smutted artificially by mixing with 100 cc. of smut kernels (Tilletia tritici), 

 were treated in part with copper sulphate and in part with Uspulun. In the 1st case the seed 

 was sprinkled thoroughly with a solution of copper sulphate (100 gm. of copper sulphate 

 dissolved in 1.25 1. of water for every 50 1. of grain). In the 2nd case it was sprinkled with 

 Uspulun (20 gm. of Uspulun dissolved in 4 1. of water for every 50 1. of grain). In both cases 

 the seed was thoroughly mixed during the sprinkling and was planted immediately after 

 treatment. The following numbers give the results in the various plats, in terms of smutted 

 heads in 780 heads: Untreated — 52, 69; Uspulun — ^11, 9, 28; copper sulphate 1, 0, 0. — D. 

 Atanasoff. 



430. Birmingham, W. A. A treatment for tomato wilt on trial. Agric. Gaz. New South 

 Wales 32 : 212. 1921. — A popular treatment for tomato wilt was tried with negative results. — 

 L, R. Waldron. 



431. BovELL, J. R. Plant inspection and fumigation. Rept. Dept. Agric. Barbados 

 1917-1918: 31-32. 1920. — When the Bourbon cane succumbed to the attacks of Colletotrichum 

 falcatum it was replaced by the White Transparent, which often grew m the same hole as badly 

 attacked Bourbon canes, but remained resistant. It now appears, according to the author, 

 that after many years of cultivation in the Colony, the White Transparent has lost its immu- 

 nity to the disease in question. Cercospora vaginae and Marasmius sacchari were also in evi- 

 dence and will continue so long as planters do not select cane-planting material more carefully. 

 The green scale. Coccus viridis, was successfully controlled by spraying with spores of Cepha- 

 losporium lecanii suspended in water. — /. S. Dash. 



432. Eastham, J. W., and E. C. Hunt. Spraying for apple scab in the Kootenays. Agric. 

 Jour. [British Columbia] 6: 38-39. 1921. — Results are recorded of comparative tests with 

 lime-sulphur and the modified Bordeaux mixture with soluble sulphur as calyx spray recom- 



