- 456 - 
SMITH. (1974) 
1921. FIGHT AGAINST APHIDS. Rev. Hortic. Algerie, Algiers 25(3): 50. 
[In French. Abstract in Rev. Appl." Ent . ' (A) 10: 170. 1922.] 
Aphids are killed in a few minutes "by the application of a 
dust consisting of 100 parts of powdered lime to 30 parts of tobacco 
powder. This mixture is also ver3 r effective against young grasshoppers 
if applied within 2 hours after hatching. 
SMITH, L. M. (1975) 
1930. THE SNOTTf TREE CRICKET AND OTHER INSECTS INJURIOUS TO RASPBEHEIE 
Calif. Agr. Expt. Sta. Bull. 505, 38 pp., illus. [Abstract in Rev. 
Appl. Ent. (A) 19: 318-319. 1931.] 
Calcium cyanide and nicotine dusts were tried against the snowy 
tree cricket ( Pecan thus niveus De G.), but were finally abandoned owing 
to high cost, difficulty of handling, and great variation in toxicity. 
ZACHER, F. (1976) 
1927 . DIE V0RRATS-, SPEICHSR- UND M^TERIALSCHADLINGS UND IHRE BEKAiJFU] 
355 pp., illus. Berlin. 
Nicotine vapors are ineffective against cockroaches in kitchens, 
cellars, and store rooms (p. 48). The following spray solution is recoi 
mended: 2 kg. soft soap, 1 1. tobacco extract (8 to 10 percent nicotine 
and 100 1. water. 
JONES, D. X!. (1977) 
1917. THE EUROPEAN EARTH G AND ITS CONTROL. U. S. Dept. Agr. Bull. 566 
12 pp., illus. [Abstract in Rev. Appl. Ent. (A) 5: 444-445. 1917.] 
If the earwig's ( Forficula auricularia L.) attacks persist during 
the summer a contact spray of nicotine, soft soap, and water should be 
used over the plants every three nights after July 1 until the pest is 
controlled. 
THOMSEN, F. (1978) 
1909. NOTES ON TERMITES. Transvaal Agr. Jour. 7: 512-520, illus. 
Tobacco extracts of all sorts seem worthless for the purpose of 
preventing termite attacks. None of then contain more than an average < 
8 percent nicotine and this is easily washed out of the wood by water ii 
the soil, leaving the wood entirely unprotected (p. 516). 
MORRILL, A. T7. (1979) 
1919. REPORT OF THE ENTOMOLOGIST. NOTES ON IMPORTANT INSECTS OF THE 
YEAR. Ninth Ann. Rept. Ariz. Comn. Agr. and Hort. 1917. pp. 15-61, i 
[Abstract in Rev. Appl. Ent. (A) 7: 204-206. 1919.] 
