142 



InstrucQoes para o Expurgo das Sementes de Algodao. Desinfecgao 

 de Sementes. [^'''^tructions for the Cleansing of Cotton Seed. 

 The Disinfection of Seed.] — Bol. Agric, S. Paulo, xx, no. 5, May 

 1919, pp. 138-139. [Received 18th January 1921.] 



These instructions were issued in order to prevent the spread of 

 Platyedra {PecimopJiora) gossypiella in the State of San Paulo. A 

 government official must be attached to all ginneries, and the seed 

 must be constantly under his supervision. Among other measures 

 it is required that oil mills should construct their seed stores on such 

 lines as will prevent a spread of the pest. No seed may be planted 

 until it has been disinfected. 



As Pragas da Lavoura. [Pests of Agriculture.] — Bol. Amc, S. Paulo^ 

 XX, no. 5, May 1919, pp. 139-141. 



Pests submitted for identification include a Pyrrhocorid bug, 

 Dysdercus ntficollis, L., from cotton bolls, and locusts parasitised by 

 a Dipteron. The former insect does not do much harm, as it appears 

 when most of the crop has been harvested. Collection is the method 

 advised against it. 



GuEDEs (G.). Os Curuqueres. Seus Lugares predilectos. Sua 

 Extinc^ao. [Alabama argillacea. Its preferred Situations and 

 its Destruction.] — -Bol. Agric, S. Paulo, xx, no. 9, September 

 1919, pp. 431-433. [Received 18th January 1921.] 



A remarkable outbreak of Alabama argillacea is recorded in San 

 Paulo, the richest soils, where cotton was flourishing, being especially 

 infested. Coffee planted among cotton also suffered severely. 

 Paris green is the best insecticide, either as a liquid or dust-spray, 

 the former being cheaper and easier to apply if proper care is taken. 



GuEDES (G.). Extinc^ao dos Gafanotos. Quadro synoptico. [Locust 

 Destruction. A synoptic Table.] — Bol. Agric, S. Paulo, xx, 

 no. 9, September 1919, p. 434. [Received 18th January 1921.] 



This table indicates the measures applicable against the different 

 stages of locusts under various conditions of soil and weather. 



GuEDES (G.). Relatorio sobre a Extincgao de Gafanhotos. [Report 

 on Locust Destruction.] — Bol. Agric, S. Paulo, xx, no. 10-12, 

 October-December 1919, pp. 509-519. [Received 18th January 

 1921.1 



The work forming the subject of this report was carried out from 

 October to December 1918. A spray containing 2 parts by volume 

 of creoline, 4 of kerosene, and 94 of water, proved very destructive 

 to the young hoppers. Its effect becomes apparent about an hour 

 after spraying. A flame-thrower was also used with good results. 



Averna-Sacca (R.). Molestias da Jabotieabeira. [Diseases of 

 Jaboticabeira.]— jBo/. Agric, S. Paulo, xxi, no. 1-3, January- 

 March 1920, pp. 29-37. [Received 18th January 1921.] 



An emulsion of 3 per cent, tar-oil is recommended against a scale, 

 closely resembling Pseudococcus grandis, Hemp., infesting the leaves 



