78 



III. Semichon (L.). Th6orie et pratique sur le refroidissement dans les 

 pulverisations chaudes. [The theory and practice of coolmg 

 in hot sprays.] pp. 417-419. 



The reasons advanced by M. Chauvigne are adversely criticised ; 

 in any case, theory may be set aside in favour of practical experience, 

 which has proved the real usefulness of hot water^ — employed according 

 to the author's directions' — in controlling insect pests and even certain 

 fungi. It is probable that the equipment at present available is open 

 to improvement, but the method is reliable as it stands at present. 



Maisonneuve (P.). Nouveau proc6d6 centre la Cochylis. [A new 



method against Clysia ambiguella.'] — Rev. Vitic, Paris, xliii, 

 nos. 1120 and 1121, 16th and 23rd December 1915, pp. 456-459 

 and 475-480. 



After reviewing the various methods of control practised against 

 Clysia ambiguella and Polychrosis hotrana, it is suggested that a more 

 extensive use be made of paper bags for the purpose of protecting 

 the grapes, not only against vine moths, but also against mildew and 

 Oidium. It will, of course, be necessary to use sulphur before placing 

 the bags in position, so that any existent mildew or Oidium germs 

 may be destroyed. If an acre has 1,600 stocks and each stock averages 

 eight bunches, the total number of bags will be 12,800. A woman can 

 fasten 1,000 bags in a 10-hours day so that just under 13 days' wages 

 or 21 shillings will be needed. The bags will cost about 64 shillings. 

 The total expense per acre will therefore amount to 85 shillings, plus 

 that of removing the bags. Against these costs, may be set the economy 

 in mildew and oidium treatment and the value of those bags which 

 are removed in sufficiently good condition to be used again. 



L. D. Le d^corticage contre la Cochylis. [Scraping the bark as a 

 measure against Clysia ambiguella.] — Pr ogres Agric. Vitic, Mont- 

 pellier, Ixiv (32nd year), no. 49, 5th December 1915, pp. 538-540. 

 10 figs. 



This article describes and illustrates the various devices employed 

 in removing the bark from vines as a measure against Clysia ambiguella. 



Eavaz (L.) k Obiedoff (S.). Essais de traitement contre Cochylis 

 et Eud^mis. [Experiments in controlling Clysia ambiguella and 

 Polychrosis botrana.] — Progres Agric. Vitic, Montpellier, Ixiv 

 (32nd year), no. 49, 5th December 1915, pp. 540-547,. 2 figs. 



The conclusions arrived at in these trials are not necessarily of 

 general application, for they depend on the conditions obtaining at 

 the time the work was done, and furthermore the vineyard of the 

 School of Agriculture at Montpellier, where they were carried out, 

 had suffered little from infestation. The first plot was treated with 

 Bordeaux mixture to which -^^ per cent, of nicotine had been added ; 

 in the second, Bordeaux mixture was used with the addition of J per 

 cent, of lead arsenate rendered adhesive with the usual substances ; 

 in the third, newly slaked lime was employed ; and in the fourth, hot 



