244 EXPEKIMENT STATION RECORD. 



Disorders and parasites of rice, L. Granato (Bol. Agr. [Sao Paulo], 14. ser,, 

 1913, No. 1, pp. 1-17). — This is a somewhat systematic general account of rice 

 disorders as observed in Sao Paulo in recent years, including some observations 

 on animal and cryptogamic parasites. 



A sclerotial disease of rice, F. J. F. Shaw (Mem. Dept. Agr. India, Bot. Ser., 

 6 (1918), No. 2, pp. 11-23, pis. 5).— The author states that Selerotium oryzce 

 has recently been demonstrated on rice in India, the attack manifesting itself 

 through extensive tillering from the base of the infected culm. Inoculated 

 laboratory plants died, while infected field plants were only weakened, failing 

 to produce good seed. The fungus is said to show, according to the various 

 substrata used, decided differences, these being most marked in the color and 

 form of the hyphse. No trace of a perfect stage was observed. The sclerotia 

 are thought to winter in the soil and to be practically beyond the reach of 

 ordinary remedies. The breeding of resistant varieties of rice is suggested. 



A bibliography is appended. 



A disease of rice {Agr. News [Barbados], 12 {1913), No. 298, p. 318).— This 

 is a summary of the article above noted. 



History of root rot or red rot of beets, A. Stift (BI. Zuckerriihen'bau, 20 

 {1913), No. 15, pp. 225-230). — The author gives a condensed account of efforts 

 to check this disease and of related writings during the last 60 years, closing 

 with a reference to the means recommended by Eriksson (E. S. R,, 29, p. 50) 

 for its control. 



Recent studies with fertilizers as protective to beets against dry rot, 

 heart rot, and nematodes, R. Schandee {Bl. Zuckerriibenbau, 20 {1913), No. 

 11, pp. 169-173; Deut. Zuckerindus., 38 {1913), No. 7, pp. 154, 155; ahs. in 

 Centbl. Bakt. [etc.], 2. Aht., 38 {1913), No. 7-12, pp. 2^6, 247).— The author 

 states that calcium sulphate was ineffective as used against heart rot and 

 dry rot of beets; that the free use of potassium, nitrogen, and phosphorus 

 fertilizers increased considerably the yield of the beet crop on ground in- 

 fested with nematodes ; that shallow plowing as protection against nematodes 

 was ineffective, proving also injurious to the beet crop where the above-named 

 rots prevailed, and that the Kiilin method of trap plants seems to be of limited 

 adaptability for this purpose. 



Protection against nematode injury, W. KEtJGER {Centbl. Zuckerindus., 21 

 {1913), No. 15, p. 515; abs. in Centbl. Bakt. [etc.], 2. Abt., 38 {1913), No. 7-12, 

 pp. 167, 168).— In continuation of previous notes (E S. R., 27, p. 152) the 

 author, discussing nematode injury to the beet crop and some difficulties of 

 protection therefrom, states that field experiments have been continued at the 

 experiment station at Bernburg to test the effects, as regards protection, of 

 variations in soil absorptivity, in case particularly of phosphorus and potas- 

 sium and in general of the more available compounds. It is held that loss as 

 regards quantity and quality of the product is less when the supply of available 

 nutriment is more plentiful. 



Tomato diseases, T. C. Webb {Jour. Agr. [New Zeal.], 7 {1913), No. 1, pp. 

 46-52, figs. 2). — The results of experiments for the control of tomato diseases 

 on plants grown under glass are given. 



The tomatoes were sprayed with different fungicides, and from January 

 until April were kept free from disease by the use of either Bordeaux mix- 

 ture or Burgundy mixture. After April 5, owing to other work, a period of 3 

 weeks elapsed without spraying, when the tomato spot {Cladosporrum, fulvum) 

 appeared on all the plants. Spraying with Bordeaux mixture at 10-day inter- 

 vals held the disease in check, but the use of Burgundy mixture after April 5 

 was without any advantage. 



