University of California

A preliminary study of petroleum oil as an insecticide for citrus trees


E. R. deOng
Hugh Knight
Joseph C. Chamberlin

Authors Affiliations

E. R. deOng was Assistant Entomologist in Experiment Station; Hugh Knight was Assistant in Entomology, Citrus Experiment Station, resigned; Joseph C. Chamberlin was Assistant in Entomology, Citrus Experiment Station, resigned.

Publication Information

Hilgardia 2(9):351-386. DOI:10.3733/hilg.v02n09p351. January 1927.

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Abstract does not appear. First page follows.


The general purpose of this investigation was a study of petroleum oils in relation to their availability as insecticides for use on citrus trees. This involved selection, first on the basis of tree tolerance, and secondly on the basis of insecticidal value. The data thus far obtained and the conclusions derived therefrom are believed to be of sufficient importance to justify this preliminary report. Investigations along the more promising lines opened up by the study are still in progress.

While the several phases of this investigation were conducted coöperatively and with free consultation between the authors, portions of the work were of necessity carried out semi-independently. Thus the selection of oils by foliage testing and the development of the chemical aspect of the paper have been largely the work of deOng at Berkeley and in southern California, while the insecticidal tests proper, together with their accompanying developments, were principally the joint work of Knight and Chamberlin at Riverside. The authors are indebted to H. J. Quayle for valuable suggestions and criticisms.

Literature Cited

[1] Quayle H. J. Resistance of certain scale insects in certain localities to hydrocyanic acid fumigation. Jour. Econ. Ent. 1922. 15:400

[2] Gray Geo. P., deOng E. R. Laboratory and field tests of California petroleum insecticides. Indus. Eng. Chem. 1925. 18:175-180.

[3] Volck W. H. Spraying with distillates. California Agr. Exp. Sta. Bul. 1903. 153:1-31.

[4] Magness J. R., Burroughs A. M. Apple storage investigations. 1921-22. Canton, Pa.: Marble Lab. Rept.

[5] Burroughs A. M. Effects of oil sprays on fruit trees. Proc. Amer. Soc. Hort. Sci. 1923. 1923:269-277.

[6] Edeleanu L. Refining petroleum by liquidified sulfur dioxide. Amer. Inst. Min. Eng. Bul. 1914. 93:2313

[7] Moore Wm. A study of the toxicity of kerosenes. Jour. Econ. Ent. 1918. 11:70-75.

[8] Fawcett Howard S. A spotting of citrus fruits due to the action of oil liberated from the rind. California Agr. Exp. Sta. Bul. 1916. 266:261-269.

[9] Tinkle P., Draper H. D., Hildebrand J. H. The theory of emulsification. Jour. Amer. Chem. Soc. 1923. 45:2780-2788.

[10] Bhatnagar S. S. Studies in emulsions. Jour. Chem. Soc. 1921. 119:61 DOI: 10.1039/ct9211900061 [CrossRef]

[11] Parsons Leon W., Wilson O. G. Jr. Some factors affecting the stability and inversion of oil-water emulsions. Jour. Indus. Eng. Chem. 1921. 13:1116-1123. DOI: 10.1021/ie50144a010 [CrossRef]

[12] deOng E. R., Knight Hugh. Emulsifying agents as an inhibiting factor in oil sprays. Jour. Econ. Ent. 1925. 18:424

[13] Schafer Geo. D. How insecticides kill. Parts 1 and 2. Michigan Agr. Exp. Sta. Tech. Bul. 1911. 11:1-65.

[14] Schafer Geo. D. How insecticides kill. Part 3. Michigan Agr. Exp. Sta. Tech. Bul. 1915. 21:1-67.

[15] Siegler E. H., Popenoe C. H. The fatty acids as contact insecticides. Jour. Econ. Ent. 1925. 18:292-299.

deOng E, Knight H, Chamberlin J. 1927. A preliminary study of petroleum oil as an insecticide for citrus trees. Hilgardia 2(9):351-386. DOI:10.3733/hilg.v02n09p351
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