373 



Xylehorus dispar, F. , makes a complex system of borings, on the walls 

 of which grow certain fungi that form the sole nutriment of the larvae. 

 Since these beetles chiefly attack diseased trees, the best means of 

 controlling them is by careful cultivation and the removal and burning 

 of all dead branches and twigs. The Longicorn, Ceramhyx scopolii, 

 Fuessl., also attacks diseased and dying trees, chiefly apple and cherry. 



Cossus cossus, L. (ligniperda, F.) and Zeuzera pyrina, L., are two 

 very destructive Lepidopterous pests. The large gregarious cater- 

 pillars of C. cossus bore into the trunks of healthy apple, willow and 

 elm trees near the ground level. As these galleries open to the exterior 

 by a common and conspicuous orifice, this pest can be readily controlled 

 by filling the borings with gelatinous capsules of carbon bisulphide 

 and afterwards sealing the aperture with clay. The same method 

 can be employed to destroy the solitary larvae of Z. pyrina, which 

 bore into the wood of healthy lime and fruit trees. 



Berlese (A.). Los Insectos entomofagos y su Utilizaci6n en Provecho 

 de la Agricultura. [Entomophagous Insects and their Employment 

 for the Benefit of i^griculture.] — Bol. Agric. Tecnica y Economica, 

 Madrid, ix, no. 101, May 1917, pp. 417-428. 



This paper gives a general review of the work done in utilising 

 beneficial insects against agricultural pests. 



Reports on the State of the Crops in each Province of Spain on the 

 24th May 1917. — Bol. Agric. Tecnica y Economica, Madrid, ix, 

 no. 101, May 1917, pp. 445-1G6. 



In Cordova oaks are seriously infested by Tortrix viridana, for 

 which no practical method of control is known at present. Colaspi- 

 dema sp. is expected to do serious injury to lucerne fields in Gerona, 

 unless remedial measures are undertaken. 



Elegi ( — ). Difendiamo I'Olivo dai suoi Nemici. [Let us defend the 

 Olive against its Enemies.] — Riv. Agric, Parma, xxiii, no. 25, 

 22nd June 1917, pp. 339-340. 



This paper deals with the control of olive pests in Italy, but contains 

 no new matter. 



La Lotta contro la " Cochylis " in Isvizzera. [The Control of Clysia 

 ambigueUa, Hb., in Switzerland.] — Minerva Agraria, Milano, ix, 

 no. 7-8, 15th-30th April 1917, pp. 92-93. (Abstract from La 

 Terre Vaidoise, no. 39, 1916.) [Received 27th June 1917.] 



This paper is a resume of the report by Prof. Faes of the Lausanne 

 Viticultural Station on experiments in the control of Clysia ambigueUa, 

 Hb., conducted in 1915. Nicotine sprays, the proprietary product 

 Golazine, and pyrethrum powder gave satisfactory results. The 

 pyrethruni powder was obtained from locally-grown plants and proved 

 superior to that of Oriental origin. 



