119 



LiCHTENSTEiN (J. L.) & Grasse (P.). La Teigne de la Pomme de 

 Terre {Phthorimaea operculella, Zell.) dans le D^partement de 

 I'H^rault (Lep. Tineidae).— J5«//. Soc. Ent France, Paris, 1921, 

 no. 18, 23rd November 1921, pp. 267-268. 



Phthorimaea operculella, Z., is apparently spreading in France, and 

 is now recorded from Herault. The necessity for careful inspection 

 of imported potatoes and of those transported from infested locaUties 

 is emphasised. 



Vayssiere (P.). Degats causes par le Grillon domestique.— 5w//. Soc. 

 Ent. France, Paris, 1921, no. 17, 9th November 1921, p. 248. 



Gryllus doniesticus, L., is recorded as damaging woollen and silk 

 materials in a Paris shop. The crickets evidently came from a neigh- 

 bouring bakery. Cotton goods were not touched. 



SoBRERo (L. R.). La Pulverizacion de los Arboles y Plantas culti- 



vadas. — Gaceta Rural, Buenos Aires, xv, no. 169, August 1921 

 pp. 31-45, 1 fig. 



Instructions are given for spraying fruit-trees, and the necessary 

 apparatus and machinery are described. The preparation of such 

 insecticides as calcium arsenite, calcium sulphide, nicotine solution 

 and Bordeaux mixture is explained, and the combination of certain 

 insecticides and fungicides is discussed. 



LiGNiEREs (J). Sobre los Metodos para la Destruccion de la Langosta, 

 de algunos Coleopteros y otros Parasites de la Agrieultura.— 



Rev. Agric., San Jacinto, Mexico, vi, no. 8, December 1921 

 pp. 479-484. 



This is a review of various measures for use against agricultural 

 pests, including in particular a description of the use of flame- 

 throwers and of toxic gases, such as chloropicrin, against locusts, 

 and is written in the hope of arousing interest in Argentina in these 

 new methods. 



YoTHERs (W. W.). U.S. Bur. Ent. Some Fundamentals of Grove 

 Pest ContToh—Qtrlv. Bull. Florida State Plant Bd., Gainesville, 

 vi, no. 1, October 1921, pp. 1-10. 



The control of pests in citrus groves may be arrived at (1) by the 

 reduction of pests to a minimum and maintaining them in such a state ; 

 (2) by total and complete dependence on natural control ; (3) by 

 dependence on natural control supplemented by artificial means when 

 the pests are too abundant. The first has not been practised to a 

 great extent in Florida, and necessarily involves a knowledge of the 

 life and seasonal history of the most important pests, and also of 

 insecticides. The second method is the most extensively followed, 

 and internal parasites, predacious enemies and entomogenous fungi 

 are undoubtedly important factors in reducing damage from insect 

 pests. The author maintains that the third method is the most 

 practicable and feasible, as it is the least expensive and best adapted 

 to citrus growing at the present time. 



The great advantages of the presence of entomogenous fungi are 

 discussed. Practically all whiteflies infesting citrus trees are attacked 

 by them. Spraying for whiteflies is usually done before the fungi 



