420 



SicARD (H). Action de la Bouillie bordelaise au Pyrethre et de ia 

 Bouillie bordelaise nicotin6e appliquees en Traitements curatifs 

 contre la premiere G6n6ration d'Eudemis. — Progres Agric. & 

 Vitic, MoHlpellitr, Ixxvi, no. 27, 3rd July 1921, pp. 10-11. 



Tests of the exact value of a combination of Bordeaux mixture 

 and pyrethrum against the first generation of Polychrosis botrana, 

 Schiff., were made by comparing the effect of 2 gals, of pyrethrum-soap 

 solution to 18 gals, of Bordeiiux with that of 1 pint of nicotine extract 

 (containing 50 per cent, of alkaloid) to 46 gals, of Bordeaux. The 

 mixing is rapid and the solutions were applied immediately. 



It was found that the mortality among the caterpillars was 92 per 

 cent, for the pyrethrum mixture and 60 for the nicotine mixture, 

 thus confirming last year's conclusions [R.A.E., A, viii, 369]. 



Hubert (A.). Quelques Essais de Traitement de la Cochylis. — 



Progres Agric. & Vitic, Montpellier, Ixxvi, no. 27, 3rd July 1921, 

 pp. 12-14. 



This paper deals with Polychrosis botrana, Schiff., as well as with 

 Clvsia ambiguella, Hb. 



The author has obtained unsatisfactory results with the pyrethrum- 

 soap spray used in moderate quantities, and suggests that the price 

 does not permit the abvmdant applications that seem necessary. 

 It is possible that a 3 per cent, solution of soap may give as good 

 a result. 



Trials with a commercial fluid bait of secret composition, and also 

 with strings dipped in a phosphorescent adhesive intended to attract 

 moths flying close by, were unsuccessful. 



All three methods seem worthy of further investigation, as modifica- 

 tions may result in making them valuable. 



Faes (H). L' Action du Savon-Pyrethre sur les Chenilles de Cochylis 

 et d'Eud6mis. — Progres Agric. & Vitic, Montpellier, Ixxvi, 

 no. 29, 17th July 1921, p. 68. 



Referring to the two preceding papers the author, who is chief of 

 the Swiss federal viticultural experiment station at Lausanne, agrees 

 in toto with the results obtained by M. Sicard, and suggests that the 

 non-success of M. Hubert may be due to the pyrethrum used b}^ the 

 latter being in some way faulty. A soap solution by itself does not 

 give the same highly satisfactor}^ results. Pyrethrum-soap kills 90- 

 100 per cent, of the caterpillars of Polychrosis botrana, Schiff., which 

 are even more sensitive to it than those of Clysia ambiguella, Hb. 



GoxDE (H.). La Mouche des Asperges en Loir-et-Cher.^ — //. d' Agric. 

 Pratique, Paris, xxx\-i, nos. 26 & 27, 2nd & 9th July 1921, 

 pp. 13-14, 35-36, 8 figs. 



In Loir-et-Cher, where about 4,500 acres are under asparagus, 

 the asparagus fly, Platyparea poeciloptera, is noticed with early 

 asparagus in April and continues until June. It oviposits at the base 

 of the scales, and those eggs hatch that are deposited on the heads 

 that are not picked, i.e., on beds less than four years old or on plants 

 kept for seed. After mining the head the maggot pupates within it, 

 the adult appearing in the following spring. 



