- 435 - 
Large quantities' of to"bacco. extract, kerosene, and lysol soap 
emulsions were used in a comparative test of these substances on an 
area of 1,771.5 acres of cabbage infested by the cabbage moth. To- 
bacco soap emulsion (1 percent tobacco extract: 8-10 percent nicotine: 
2 percent soap) gave the best results. 
12. European Corn Borer and Corn Ear Worm, 1305-1934 
CAEEREY, D.J. (1873) 
1925. STATUS 01 THE EUROPEAN COM BORER IN THE UNITED STATES IN 1324. 
Jour. Econ. Snt . 18: 98-109. [abstract in Rev. Appl. Ent . (A) , 13: 
244-245. 1925.] 
A 2 percent free nicotine dust gave encouraging results in 1924 
when applied at the period of 'maximum egg hatching. 
WILES, S. (1874) 
1925. DER STAND DER MAI SZUNSLERERAG-E . Arch. Naturgeschichte, Abt . A 
91 (9): 31-72, illus. 
The European corn borer larvae ( Pyrausta nubilalis Eb.) can 
only be reached just after hatching from the eggs, during which tine 
it is advisable to dust the plants with an arsencial or 2 percent 
tobacco powder (p. 54) . 
ANONYMOUS (1875) 
1931. REPORT OF EUROPEAN CORN BORER SYMPOSIUM AGRICULTURAL CONFERENCE 
1931. Ind. Agr. Sxpt. Sta. Stencil Bull. 5, 15 pp. [Abstract in 
Rev. Appl. Ent. (A) 19: 475-477. 1931.] 
Sweet corn, which is the first to be planted, is likely to 
receive the first severe infestation in Indiana. In studies with 
insecticides, nicotine and Penetrol have given 85 percent control 
of Pyrausta nubilalis Hb. under the favorable conditions prevailing 
during the 1930 season . 
BATCHELDER, C. H., and QUESTEL, D. D. (1875) 
1931. INSECTICIDAL CONTROL OE THE EUROPEAN CORN BORER: THE PROBLEMS 
INVOLVED AND SOME EXP ERI LIEUT AL RESULTS. Jour. Econ. Ent. 24 (6) 
1152-1167, illus. [Abstract in Rev. Apr-1 . Ent. (a) 20: 132-133. 
' 1932.] 
Insecticides involving the use of nicotine and pyre thrum were 
found impractical in their present physical form for use against this 
moth (Pyrausta nubilalis Hb . ) . 
