Pickleworm.—-No. 7 at 370 pg./sq. cme or at 2 1b./100 gal. gave 100- 
percent kill. 
It is significant that of the 21 compounds tested 10 were toxic to at 
least one insect species. Since very few of the compounds were tested 
against all the species, further tests might have shown toxicity to other 
insects. It is worthy of note that the most toxic compounds of the group 
included bromobenzenesulfonamide itself and the lower aliphatic N-substituted 
amides. The aromatic and heterocyclic compounds in general showed much less 
toxicity. 
t—Bromo-N-ethylbenzenesulfonamide and p-bromo-N-pentylbenzenesulfonamide 
were also weak synergists for pyrethrum when used against the house fly. 
Literature Cited 
(1) Bottger, G. T., and Levin, Clarence 
1947. Preliminary tests of synthetic organic compounds as insecti- 
cides. Part III. U. S. Bur. Ent. and Plant Quar. E-729, 
23 PPpe 
(2) Bushland, R. C. 
1940. The toxicity of phenothiazine and certain related compounds to 
young screwworms. Jour. Econ. Ent. 33: 666. 
(3) Campbell, F. L., and Sullivan, W. N. 
1938. A metal turntable method for comparative tests of liquid spray 
contact insecticides. Soap 14; 119. 
(4) McGovran, E. R., and Piquett, P. G. 
1946. Insecticidal tests of some materials on the Mexican bean beetle. 
U. S. Bur. Ent. and Plant Quar. E-682, 9 pp. 
(5) Siegler, E. H., and Munger, F. 
1933. A field and laboratory technique for toxicological studies of 
the codling moth. Jour. Econ. Ent. 26: 438. 
