Aphid resistance to parathion: Nonphosphate insecticides under study for control of spotted alfalfa aphid where pest develops resstance to parathion

Reynolds, H; Stern, V

Aphid resistance to parathion: Nonphosphate insecticides under study for control of spotted alfalfa aphid where pest develops resstance to parathion

Authors

Harold T. Reynolds
Vernon M. Stern

Authors Affiliations

Harold T. Reynolds is Associate Entomologist, University of California, Riverside; Vernon M. Stern is Assistant Specialist in Entomology, University of California, Riverside.

Publication Information

Hilgardia 11(2):4-14. DOI:10.3733/ca.v011n02p4. February 1957.

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Abstract

Failure of parathion and malathion to control the spotted alfalfa aphid—Therioaphis maculata (Buckton)—in California was reported in an increasing number during the summer of 1956.

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Agricultural-business outlook: Farmers must understand and apply economic principles to the business of modern agricultural production by scientific means

Peach tree borer control tests: Fall treatments with soil fumigants and use of trunk sprays evaluated in experimental program during the 1955–56 seasons

Fungi on spotted alfalfa aphid: Spread of fungi by natural and artificial means is resulting in excellent biological control of aphid in many counties

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Citrus weed control by monuron: Experiments with urea herbicides for weed control in citrus orchards encouraging but use of the chemicals is restricted

Weed control near grass areas: Soil fumigants and contact spray materials included in series of studies on control of weeds in relatively confined areas

Effect of zinc applications on the crop of grapefruit trees affected with mottle-leaf