- 437 - 
SLMANTON, F. L., DIGKE, F. F., and BOTTGER, G. T. (1877) 
1931. THE LETHAL POWER OF CERTAIN INSECTICIDES TESTED IN MICHIGAN 
AGAINST THE EUROPEAN CORN BORER. Jour. Econ. But, 24: 395-404. 
[Abstract in Rev. Appl. Ent. (A) 19: 483-484. 1931.] 
Nicotine did not prove sufficiently toxic to justify its use. 
FICHT, G. A. (1878) 
1933. A PROGRESS REPORT ON SOME INSECTICIDES USED AGAINST THE 
EUROPEAN CORN BORER. Jour. Econ. Ent. 26: 747-754. [Abstract in 
Rev. Appl. Ent. (A) 21: 590. 1933.] 
Nicotine added to oil emulsions did not appreciably affect 
the results obtained in experiments against the corn borer ( Pyrausta 
nub i I al i s Hb . ) . 
QUAINT ANCE, A. L. , andBRUES, C. T. (1879) 
1905. THE COTTON BCLLtfORM. U. S. Dept. Agr. Bur. Ent. Bull. 50, 155 pp., 
illus. 
Bishopp and Jones put tobacco on the corn silks and ears to 
prevent this moth ( Keliothis obsoleta Fabr.) from ovipositing, but the 
results were negative (p. 133). 
JACK, R. V. (1880) 
1925. NOTES FROM THE ENTOMOLOGICAL LABORATORY, Rhodesia Agr. Jour. 
22 (8): 852-855. [Abstract in Rev. Appl. Ent. 14: 11. 1926.] 
A combined spray of 1 gal. lime-sulphur, 9 oz. 40-percent nico~ 
tine sulphate, 7 oz. universal spreader and 100 gal. water, applied 
primarily against aphids and thrips apparently had some effect in 
controlling the caterpillars Heliothis ( Chi or idea ) obsoleta F. 
but further investigations in this connection are necessary. The 
black citrus aphid ( Aphis tavaresi Del Guer.) is easily killed with 
nicotine sprays. 
FREEBORN, S. B. , and TO.ICRE, F. H. (1881) 
1929. ATTEMPTS TO PROTECT STCEST CORN FROM INFESTATIONS CF THE CRN EAR 
I7DHM, HELIOTHI S OBSOLETA FABR. Jour. Econ. Ent. 22: 666-671. [Ab- 
stract in Rev. Appl. Ent. (A) 17: 724. 1929.] 
Poor results were obtained with arsenates and various nicotine 
combinations including a new proprietary nicotine caseinate. 
BURDETTE, R. C. (1332) 
1934. RESULTS OF TT70 YEARS' T7QRK 171 TH AN ATTRACTIVE SPRAY FOR CORN EAR 
TJORM MOTH (HEL IOTHIS OBSOLETA FAB.) Jour. Econ. Ent. 27: 213-217. 
