359 



Should this method prove efficacious in all cases no more practical 

 measure along the lines of estate routine could be devised ; but it 

 still seems probable that the key to the problem is the establishment 

 of effective "flight breaks." 



Negre (M.) & Pi CARD (F.). Sur les Moeurs et la Presence en France 

 de Laspeyresia conicolana, Heyl. (Lep. Tortricidae). — Bull. Soc. 

 Ent. France, Paris, 1921, no. 1, pp. 10-12, 1 fig. 



Cydia [Laspeyresia) conicolana, Heyl., is recorded on Corsican 

 pine {Piniis laricio) in the forest of the lower Herault mountains in 

 France. There is only one generation a year, and hibernation, as in 

 the case of C. [L.) strobilella, L., probably occurs in the larval stage. 

 Adults were noticed in April and May. As a result of attack by this 

 moth the seeds are rendered useless, and the pine cone itself becomes 

 deformed. Serious damage has also been caused to Corsican pine 

 cones by the larva of a Cecidomyiid not yet identified. 



Masse (A.). Insectes nuisibles des For^ts. iii. Le Charengon des Fins, 



Pissodes strobi. — Nat. Canad., Quebec, xlvii, no. 10, April 1921, 

 pp. 218-224. 

 A great deal of damage to white pine {Pinus strobus) is caused by 

 the weevil, Pissodes strobi. The eggs are laid in the inner pulpy bark 

 or corky tissue of the terminal shoots during April, May and June. 

 They hatch in about a week, and the larvae feed under the bark. In 

 Canada only one generation occurs annually. Pupation takes place 

 about the middle of the summer and lasts from two to three weeks. 

 Hibernation occurs in the adult stage, and ovi position does not take 

 place until the following spring. For the protection of ornamental 

 trees sticky bands may be used ; the other remedial measures advocated 

 have already been noticed [R.A.E., A, vi, 621. 



Degrully (L.). Centre la Cochylis et I'Eudemis. — Progres Agric. 

 & Vitic, Montpellier, Ixxv, no. 21, 22nd May 1921, pp. 493-495. 



In view of the price of nicotine, the use of arsenicals is indicated 

 for combating the vine moths [Clysia ambiguella and Polychrosis 

 botrana], and various formulae for the preparation of such sprays are 

 quoted. 



Vayssiere (P.). Le "Ver Rose" de la Capsule du Coton. — Agron. 

 Colon., Paris, vii, no. 40, April 1921, pp. 118-127, 2 plates. 

 It is stated in a footnote to this paper that Platyedra [Pectinophcra) 

 gossypiella, Saund., has been recently found in French West Africa. 

 The paper deals with its bionomics and control in various other infested 

 countries. 



OuANjER (H. M.). Guide pour I'Inspection aux Champs et pour la 

 Selection des Pommes de Terre. — Verslagen & Meded. Plantenziekt. 

 Dienst, Wageningen, no. 6a, April 1921, 31 pp., 4 plates. 



Potato plants quite close to trees or bushes may be infested by 

 Rhynchota that feed on the leaves. The injury is negligible, but is 

 easily confused with mosaic disease. The latter is transmissible in 

 various ways ; Aphids are responsible for bridging distances of 20 yds. 

 or more between diseased and healthy plants. Such transmission 

 by Aphids occurs chiefly near hedges. 



