383 



Topi (M.). Sur les Traitements insecticides contre les Teignes de la 

 Vigne : Traitements par I'eau chaude. [Insecticide treatment 

 against vine- moths : Hot water treatment.] — Pr ogres Agric. Vitic,, 

 Montpellier, Ixv (33rd year), no. 24, 11th June 1916, pp. 563-566. 



In experiments with the hot water treatment advocated by Semichon 

 [see this Review, Ser. A, iv, p. 77] against the eggs of Clysia ambiguella 

 and Polychrosis botrana, it appears that at temperatures which do not 

 injure the vine — and water at 150° F. was found to scorch both young 

 and old leaves — ^the eggs remain unaffected. To destroy them an 

 immersion of 10 seconds in water of 150° F. or perhaps 131° F. was 

 necessary. 



MuLLOT (G.). Traitement arsenical contre le N6gril de la luzerne. 



[Arsenical treatment against Colaspidema atrum, Latr.] — Progres 

 Agric. Vitic, Montpellier, Ixv (33rd year), no. 26, 25th June 1916, 

 p. 609. 



In a field of lucerne in Aude one-half of which was cut in the middle 

 of May, Colaspidema atnim, Latr., appeared in the cut portion early 

 in June. On the 8th June, 528 gals of a solution composed of 2 lb. 

 sodium arsenate and 2 lb. lime in 100 gals, water, were sprayed in fine 

 weather on the 17| acres infested. Three days later the insects had 

 disappeared. 



Causse (P.). Le traitement de la Cochylis et de la Pyrale ^ I'eau 

 chaude ; le traitement du Court-Nou6 au goudron. [The control 

 of Clysia ambiguella and Sparganothis pilleriana with hot water 

 and the treatment of short internodes with tar.] — Rev. Vitic, 

 Paris, xliv, no. 1145, 8th June 1916, pp. 409-411. 



Measures based on the experiments made by Semichon [see this 

 Review, A, iv, p. 77] appear to have given good results in a vineyard 

 containing 4,200 stocks. Instead of a sprayer, small jugs of 3| pints 

 capacity were used, the entire contents of one jug being poured on each 

 stock. The bunches were first treated and then the remainder of the 

 jugful w^as emptied on the leaves in order to destroy Pyralids. Scalding 

 occurred at a temperature of 159° F., but at 150° F. no damage was 

 done and all insects which came in contact with the water were killed. 

 It was found that a woman could treat 300 stocks a day, the cost per 

 acre, including labour and fuel being about 23 shillings. 



ViALA (P.). Le traitement de la Cochylis et de la Pyrale ^ I'eau 

 chaude. [The control of Clysia ambiguella and Sparganothis with 

 hot water.] — Rev. Vitic, Paris, xliv, no. 1147, 22nd June 1916, 

 pp. 440-442. 



In commenting on the above report, the author states that in the 

 south of France the use of hot water will probably be adopted against 

 the first generation of Clysia ambiguella and Polychrosis botrana as 

 well as against Pyralis [^Sparganothis pilleriana], as at that period hot 

 water poured by hand can easily reach the flowers. Should lead 

 arsenate, however, again prove as efficient this year in the control of 

 these insects as in the case of Haltica, it will be more economical. 



