- 491 - 
mOORE, Wm. , and GRAHAM, S. A. (209S) 
1917. A NEGLECTED FACTOR IE THE USE 01' NICOTINE SULPHATE AS it SPHAY. 
Jour. Agr. Res. 10: 47-50. [Abstract in Rev. Appl. Ent. (a) 5; 
449-450. 1917.] 
Commercial tobacco extracts containing nicotine sulphate 
should not "be applied on greenhouse plants intended for use as 
food, though tobacco extracts or tobacco papers containing free 
nicotine may bu employed with safety. Plants so sprayed however 
should not be cut for the market until the day after spraying. 
Nicotine sulphate is non-vola.tile , but the alkali in soap used in 
the spraying mixture sets frue the nicotine. 
BARGE, J. ' (2100) 
1921. L'EMPLOI DU JUS DE NICOTINE CONTRE LES INSECTES. Rev. Agr. Africa 
Nord 19 (104): 585. [Austract in Rev. Appl. Ent. (A) 9: 475. 1921.] 
A 1-percent solution of nicotine must be diluted with 5 to 10 
times its volume in water. It is well to add a solution of 0.4 lb. 
commercial soda crystals and 2 lb. of soft black soap in 200 imperial 
gal. of water' to every 20 gal. of the weaker solution. Por certain 
larvae and the more resistant aphids about 1 l/2 pt. of methylated spirits 
should also' be added. Por fumigation in greenhouses nicotine ex- 
tract (10 percent nicotine) should be diluted by 5 times only its 
volume in water, adding 2 lb. soda crystals per gal. of extract. The 
liquid is heated in a boiler and then sprinkled on bricks or iron 
sheets heated to a high temperature. The fumes should be allowed to 
act for several hours. Nicotine solutions are said to be very ef- 
ficacious in curing mange in animals. Por sheep a lotion is made 
containing 0.12 or 0.13 percent of nicotine; to this is added a 
weight of soda crystals double the weight of the pure nicotine 
[ R.A.E. (B) 9 : 164. 1921.]. 
PETERSON, A. (2101) 
1921. THE STRAWBERRY ROOT-WORM, A SERIOUS PEST ON ROSES IN THE GREEN- 
HOUSE. N. J. Agr. E:cpt. Sta. Rept. 1919-20, pp. 468-493, 
illus. [Abstract in Rev. Appl. Ent. (A) 10: 246. 1922.] 
Varying strengths of nicotine up to 4 cc. to 1 1. of water 
were used with very little success for the control of the straw- 
berry rootworm ( Typophorus canel lus) . 
PARKER, T. (2102) 
1923. THE SUPPRESSION OP INSECT PESTS AND FUNGOID DISEASES. 2. THE 
FUMIGATION AND DISINFECTION OF GLASSHOUSES. Bur. Bio-Tech. Bull. 
8, pp. 244-248. [Abstract in Rev. Appl. Ent. (A) 11: 177. 1923.] 
It is considered doubtful whether cyanide gas, nicotine, and 
the commoner fumigants are effective in killing both hibernating 
insects a.nd their eggs. 
