471 



La Lutte centre le Puceron lanig^re du Pommier. [Control Measures 

 against Eriosoma lardgerimi.] — Progres Agric. Vitic, Montpellier, 

 XXXV, no. 14, 7th April 1918, pp. 325-329. [Received 24th 

 August 1918.] 



This account of the habits of Eriosoma lanigemm (woolly apple 

 aphis) and the injury it causes to apple trees concludes with formulae 

 for several insecticides that are recommended for its control. 



These are: — ^(1) Nicotine (10 per cent, strength) ^ gal., soft-soap 

 5 lb., sodium carbonate (crystals) 1 lb., methylated spirit | gal., 

 water 50 gals. The soap is dissolved in the water, and the sodium 

 carbonate in the alcohol, and the two solutions are then mixed to- 

 gether. (2) Potassium carbonate | oz. dissolved in 5 pints rain water, 

 to which are added successively sodium sulphoricinate or soluble oil^ 

 3 oz., methylated spirit 2 oz., 10 per cent, nicotine 1 oz., the Uquid 

 being stirred briskly during the operation. (3) In another formula 

 methylated spirit is the active principle, soap being added to render 

 it adhesive. The proportions are : — Soft-soap 3h oz. , water 5 quarts, 

 methylated spirit or amyl alcohol 9 oz. (4) The alcohol may be replaced 

 by an equal weight of parafiin, according to the formula : — ParafEn 

 5 pints, soft-soap 2^ lb., water 7^ pints, this being diluted for use 

 with 4 or 5 times its own volume of water. (5) Since the admixture 

 of any kind of seed-oil intensifies and prolongs the action of the 

 the paraffin, another preparation consists of soft-soap 10 lb. dissolved 

 in 8 gals, of hot water, to which, while still hot, ordinary paraffin 5 lb., 

 and seed-oil 7i lb. are added, the whole being stirred continuously. 



All the above preparations must be applied as sprays during the 

 summer only, for fear of injuring the young leaves and shoots. In winter, 

 it is possible to use solutions twice as strorrg without injuring the trees. 



In spring and autumn infested branches may be painted with a 

 mixture composed of: — linseed oil, 14 oz., white lead, 3 oz., zinc 

 white, 2 oz., spirit of turpentine 2 oz. The oil, white lead and 

 zinc white should be boiled together for 10 minutes and, when cold, 

 the turpentine should be added. 



In cases where the roots are infested, injections of carbon bisul- 

 phide at the rate of 2 oz. to the square yard have proved efficacious. 

 When the main roots only are attacked, it is possible to expose the 

 mfected parts in autumn and water them copiously with one of the 

 above-mentioned insecticides. 



Degrully (L.). Traitements contra la Cochylis et I'Eud^mis. 



[Treatments against Clysia ambiguella and Polychrosis botrana.] — 

 Progres Agric. Vitic, Montpellier, xxxv, no. 15, 14th April 1918 

 pp. 337-342, 2 figs. [Received 24th August 1918.] 



This paper describes the usual measures against Clysia ambiguella 

 and Polychrosis botrana, and gives formulae for the preparation of 

 lead arsenate and cupro-arsenical sprays. 



Feytaud (J.). Las Insactas da la Vigna. [Vine Insects.] — Rev. Viti- 

 culture, Paris, xlviii. no. 1245, 9th May 1918, pp. 292-295. 

 [Received 24th August 1918.] 



This paper reviews the common insect pests of the vine and 

 describes the|usual measures for their control. 



