100 



Destrucci6n de Plagas. [Pest destruction]. — Bol. Minist. Agric, 

 Buenos Aires, xix, nos. 8-9, August-September 1915, pp. 523-525. 

 [Received 5th January 1916.] 



In the Argentine, 91,581 ants' nests and 14,959 kilos of bagworms 

 were destroyed in June 1915, and 115,333 ants' nests and 22,173 kilos 

 of bagworms in July. The inspection measures against Aulacaspis 

 peniagona showed that the number of infested plants was 192,265. 

 In August, 113,240 kilos of winged locusts were destroyed. 

 • 



Luna (F.). Experiencias sobre resistencia del manzano a la desinfec- 

 ci6n por el dcido cianhidrico. [Experiments on the resistance of 

 the apple to disinfection by hydrocyanic acid gas.] — Bol. Minist. 

 Agric, Buenos Aires, xix, nos. 8-9, August-September 1915, 

 pp. 557-568, 11 figs, [Received 5th January 1916.] 



• Since 1913 the Sanitary Office for Imported Plants and Seeds has 

 possessed three ferro-concrete fumigation chambers, and the present 

 experiments were made in them. For deciduous plants the following 

 formula was used : Water, four parts by weight ; sulphuric acid, 

 two parts, and potassium cyanide (98%- — 99% pure), one part. About 

 half an ounce of cyanide was used per 40 cubic feet. This dose was 

 halved for non-deciduous plants and an even weaker one was used for 

 very tender ornamental growths. The plants were taken up, fumi- 

 gated and then re-planted in a different spot. It was found that 

 apples, pears and quinces may be fumigated with maximum doses of 

 hydrocyanic acid gas, and though they suffer from the necessary 

 transplanting, the effect of the gas is nil as regards subsequent flowering 

 and fruit-bearing. 



Chilabert (J. B.). Instrucci6nes para combatir la langosta. [Instruc- 

 tions for controlling locusts.] — Bol. Dept. Nacional Fomento, 

 Asuncion, Paraguay, ii, nos. 8-9, January-June 1915, pp. 61-66, 

 [Received 7th January 1916.] 



This paper gives instructions for dealing with an invasion of locusts. 

 The plan of operations is outlined and a number of the usual control 

 methods are enumerated. 



Caldas (D.). Un acarina parasite da batata. [An Acarine parasite 

 of the potato.] — Chacaras e Quintaes, S. Paulo, xii, no. 6, 15th 

 December 1915, p. 434, 1 fig. 



At Bahia the Early Rose variety of potato was found to be attacked 

 by the mite, Tetranychus hitnaculatus, Harvey. Spraying with Hme- 

 sulphur is the control advised. 



Laines (M.). The most effective scientific means of combating the 

 grasshopper. — Revista Econoynica, Tegucigalpa, Honduras, v, no. 5, 

 November 1915, pp. 268-270. [Received 20th January 1916.] 



This paper deals with the culture of Coccobacillus acridiorum, 

 d'Herelle, the exaltation of its virulence, and the preparation of 

 bouillon for spraying areas invaded by grasshoppers. The bouillon 



