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

deOng, E; Knight, H; Chamberlin, J

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

Authors

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

Abstract does not appear. First page follows.

Introduction

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

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Also in this issue:

Farm tenancy: Practices changing in relationship between farm owner and tenant

Citrus pest control: Studies made of results from the addition of 2,4-D to oil sprays

Fertilization of celery: Adequate supply of nitrogen required for best yields

Alternate bearing of avocado: May be corrected eventually by one of two possible solutions to problem

Abscission: Chemical control of shedding or dropping of plant parts

Fruit-stem die-back: Reduction is extra benefit of application of 2,4-D to citrus for fruit drop control

Weed control: Effectiveness of soil treatment compared with contact sprays in rank growing crops

Control of rats and mice: Effectiveness requires continuous application of proven methods

Onion seed yields increased: By adequate supply of irrigation water

Wood pocket: May be result of virus or toxin in parent tree in certain strain of Lisbon lemon

Sulfa drugs tested: For control of coccidiosis, pullorum, typhoid and cholera in chickens

Aphid control on potatoes: Experimental plots near Arvin and Shafter used to test effectiveness of insecticides

Swine production: Development of bacon-type hog considered by California growers