559 



LapazarAn (J. C). Una Campana de Langosta en Zaragoza. [An 



Anti-locust Campaign in Saragossa.] — Bol. Agric. Tec. Econ., 

 Madrid, xiv, no. 163, 31st July 1922, pp. 599-608. 



An account is given of the anti-locust campaign in Saragossa, where 

 much damage was done by Dociostaurus maroccanus, especially in 

 cultivated lands near rivers. During the winter the breeding-places 

 were, as far as possible, broken up. In the spring flame-throwers were 

 used against the locusts, and gave promising results ; spraying with a 

 50 per cent, emulsion of chloropicrin proved fatal to every insect 

 that was actually hit by the spray. Various poisons were tried on a 

 small scale, lead and sodium arsenates being chiefly used, but the 

 results were not entirely satisfactory and were difficult to estimate 

 owing to the slow effect of the poison and the rapid migration of the 

 locusts. In the next campaign it is hoped to follow the plans suggested 

 by Vayssiere for use in France [R.A.E., A, ix, 403]. 



Lapazaran (J. C). Una Campana de Langosta en Zaragoza. [An 



Anti-locust Campaign in Saragossa.] — Bol. Agric. Tec. Econ., 

 Madrid, xiv, no. 164, 31st August 1922, pp. 693-698. 



Experiments are being made with the object of using Coccohacilhis 

 acridiontm, d'Her., against locusts in the province of Saragossa. As 

 regards other recognised methods, the conclusion is reached that 

 while measures exist that are capable of destroying the pest, they 

 are difficult to apply in the various countries where locusts occur 

 as a result of the arid climate. The cost of realh^ effective measures is 

 prohibitive ; for the province of Saragossa it is estimated at over 

 £50,000. 



Eckstein (F.). Abwehr gegen Tachineninfektion. Vorlaufige Mittei- 

 lung. [Defence against Tachinid Infestation.] — Centralbl. Bakt. 

 Paras. Infektionskr., Jena, Ilte Abt., Ivii, no. 1-3, 26th August 

 1922, pp. 61-69, 6 figs. 



In the course of an outbreak of Acantholyda {Lyda) stellata in a 

 Bavarian forest district, considerable parasitism by Tachinids occurred, 

 some batches of material being infested up to 60 per cent. The sawfly 

 larvae showed cuticular discolorations, and hard, dark capsules were 

 foi-med that enclosed the parasitic larvae. The first stages of such 

 capsule formations were also seen in the case of an Ichneumonid 

 parasite, and appear to be an attempt on the part of the host to protect 

 itself fi"om parasitic attack. 



ZoiMERLEY (H. H.), Geise (F. W.) & WiLLEY (C. R.). Dusting 

 Vegetable Crops in Eastern Virginia. Preliminary Report.— 



Virginia Truck Expf. Sta., Norfolk, Bulls. 35-36, 1st April- 

 1st July 1921, pp. 193-208, 6 figs. [Received 12th September 

 1922.] 



This paper records results obtained during 1921 in a study of the 

 effectiveness and of the methods of application of certain insecticides 

 and fungicides in dust form. In the authors' summary it is stated 

 that the carriers, used both separately and in combination, were finely 



