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DDT dusts (both grades) and of TDE, methoxychlor, chlordane, endrin, 
zineb, and nicotine plus polyethylene glycol (600) monolaurate. 
Insecticide residues as high as 12.2 and 82 p. p.m., respectively, 
were found on cucumbers when gamma BHC and cryolite were applied 
weekly until the day of harvest. These residues were reduced to 7.7 
and 16.2 p. p.m., by a commercial brushing or washing machine. Residues 
that followed similar use of lindane, purified DDT, parathion, and 
methoxychlor were not more than 1.6 p. p.m. 
LITERATURE CITED 
(l)Alban, E. K., and Keirns, V. E. 
1948. The effect of rotenone, commercial, and aerosol grade 
DDT dusts on the total yield, grade, and maturity of 
seven cucurbit varieties. Amer. Soc. Hort. Sci. 
Proc. 51: 448-452. 
(2) Anderson, Lauren D., and Hofmaster, Richard N. 
1948. Control of pickleworms on cucumbers and cantaloupes. 
Jour. Econ. Ent. 41: 334-335. 
(3) Arant, F. S. 
1940. A progress report on the use of rotenone dusts for the con- 
trol of the pickleworm and the melonworm in Alabama. 
Jour. Econ. Ent. 33: 840-843. 
(4) 
1941. Rate of application of derris-talc dusts for pickleworm 
control. Jour. Econ. Ent. 34: 520-521. 
(5) 
1942. Effectiveness of derris and cube in pickleworm control. 
Jour. Econ. Ent. 35: 870-872. 
(6) Brooks, James W., and Anderson, Lauren D. 
1947. Toxicity tests of some new insecticides. Jour. Econ. Ent. 
40: 220-228. 
(7) Carruth, L. A., and Howe, W. L. 
1948. Factors affecting use and phytotoxicity of DDT and other 
insecticides for squash borer control. Jour. Econ. 
Ent. 41: 352-355. 
(8) Crowell, H. H., and Morrison, H. E. 
1950. The phytotoxicity to cucurbits of some new insecticides. 
Jour. Econ. Ent. 43: 14-16. 
