398 



correct estimate to be made of the costs at current prices. Bordeaux 

 mixture is, of course, essentially a fungicide, but the addition of 

 asphyxiating, corrosive, or poisonous substances enables it to be 

 used against insect pests. 



Lavergne (G.). Les Cochenilles des Arbres Fruitiers. — //. Agric. 

 Pratique, Paris, xxxv, no. 23, 11th June 1921, pp. 454-455, 

 1 plate. 



Attention is drawn to the damage caused to fruit trees by Coccids. 

 Special reference is made to Lcpidosaphis bcckii {Mytilaspis citricola) 

 on oranges and L. ulmi {M. pomorum) on pears. In the case of the 

 latter scale Vavssiere's description and account of the life-history are 

 quoted [R.A.E., A, i, 167]. 



Froument (R.). Moyens de Lutte centre I'Eudemis. — Le Progres 

 Agric. et Vitic, Montpellier, Ixxv, no. 24, 12th June 1921, 

 pp. 566-573. 



The methods adopted in America for combating Polvchrosis on vines 

 are discussed [R. A.E., A, v, 508 ; viii, 403 ; ix, 311].' In view of the 

 legal restrictions concerning the use of insoluble arsenate, these measures 

 cannot be applied in France, and the author insists that P. botrana will 

 continue to be a pest until the judicious use of arsenates is permitted 

 and they are generally employed. 



RiEHM (E.). Priifung von Pflanzenschutzmitteln. [An Examination 

 of Preparations for protecting Plants.] — Mitt. Biol. Reichsanst. 

 Land- u. Forstw., Berlin, no. 19, December 1920, 34 pp. 

 [Received 15th June 1921.] 



This paper summarises the results published in 1919, mainly in 

 Germany, on insecticides and fungicides. The substances are listed 

 alphabetically, and in each case the reference to the original paper is 

 given. 



MoREiRA (C). Os Insectos damninhos. xv. Bicho da Fructa de 

 Conde, Antcotridia anoncUa, Sepp. [Injurious Insects. xv. 

 The Soursop Caterpillar, A. anonella.] — Chacaras e Quintaes, 

 S. Paulo, xxiii, no. 5, 15th May 1921, pp. 365-366, 1 fig. 



The principal pest of Anona mnricata (soursop) in Brazil is the 

 caterpillar of Anteotricha anonella, Sepp. This moth chiefly appears 

 from July to September. The female lays at least 50 eggs on the 

 fruits, which wither and fall as a result of the caterpillars feeding on 

 the pulp. If only a few caterpillars infest a fruit of large size, it may 

 ripen on the tree. The larval stage is believed to last about 20 days. 

 The pupal stage, which also occurs in the fruit, occupies 12. In one 

 instance 30 adults were seen to emerge from a single fruit. 



All fallen and infested fruits must be collected and burned. If high 

 prices are obtainable and the fruits are of a large size, they may be 

 enclosed in bags. Light traps will account for many adults. 



