- 363 - " 
Bordeaux mixture with 2 to 2.5 porcent of tobacco extract was 
an effective dressing, but the addition of 1 percent of sodium carbonate 
to plain tobacco extract was a more efficient dressing. Tobacco dust 
had no effect upon the larvae of vine moths. Lead arsenate "against the 
first generation of larvae is likely to gi' r e the best results until 
a reliable standard of nicotine extract can be obtained. During July 
and August it is better to use tobacco extract, 2 to 2.5 percent, as 
it acts as an insectifuge and avoids the difficulties of arsenate. 
T7AHL, C. V., and MULLER, K. (1553) 
1914. THE REPORT OF THE CHIEF PLANT-PROTECTION STATION IN BADEN, AT THE 
AUSTSNBERG- AGRICULTURAL EXPERIMENT INSTITUTE 0? THE GRAND DUCHY FOR 
1913. Stuttgart, 70 pp. [in German. Abstract in Rev. Appl. Ent . (A) 
2: 499-501. 1914.] 
Against vine moths ( Clysia ambigue lla and Polychrpsis botrana ) 
efficient results are obtained by thorough spraying- with nicotine, 
applied at the right moment. In one case good results were obtained 
with a spray containing 11 lb. of Muth l s compound, 8 3/4 lb. nicotine 
and 8 3/4 lb. soft soap. Against Aphis ma li , solutions of soft soap and 
nicotine or quassia were efficacious where the leaves had not curled 
too much. Abraxas grossulariata and Nematus were effectively con- 
trolled with tobacco dust and basic slag. Phorodon humuli was con- 
trolled with applications of nicotine and soft soap. 
ZSCHOKKE, K. (1554) 
1914. REPORT ON THE OCCURRENCE AND CONTROL OF VINE PESTS IN THE 
PALATINATE IN 1913. tfeinbau der Rheinpfalz 2 (8): 86-90. [in German. 
Abstract in Rev. Appl. Ent. (A) 2: 538-539. 1914.] 
Bait sprays were practically abandoned as being ineffective and 
costly; and sprays, especially of tobacco extract, were chiefly re- 
sorted to. This was made up of 1 lb. soft soap and 1.5 lb. tobacco ex- 
tract (10 percent nicotine) in 10 gal. water. The best results were 
obtained where both generations of Clysia, ambiguella and Polychrosis 
botrana were sprayed. Nicotine spray retards ripening of the grapes, 
but it is thought that by reducing the amount of soap this defect may 
be remedied. TThen used even against the second generation nicotine 
spray does not impart a bad flavor to the wine. 
RAVAZ, L., and OBIEDOFF, S. (1555) 
1915. EXPERIMENTS IN CONTROLLING CLYSIA AMBIGUELLA AND POLYCHROSIS 
BOTRANA . Prog. Agr. Vitic. [Montpellier] 64 (49): 540-547, illus. 
[In French. Abstract in Rev. Appl. Ent. (A) 4: 78-79. 1916.] 
In France 2 plots in a vineyard were treated with insecticides 
and 1 plot was kept as a control. The first plot was treated with 
bordeaux mixture to which l/lO percent of nicotine had been added. 
In the second, bordeaux mixture was used with the addition of l/4 
percent of lead arsenate. From all points of view the lead arsenate 
proved its superiority, and nicotine occupied a second place. 
