Hilgardia
Hilgardia
Hilgardia
University of California
Hilgardia

Walnut aphid studies in 1955: Experimental systemic aphicide OMPA has outstanding promise but more studies needed before release for commercial use

Authors

A. E. Michelbacher
Earl Oatman

Authors Affiliations

A. E. Michelbacher is Associate Professor of Entomology, University of California, Berkeley; Earl Oatman is Research Assistant, University of California, Berkeley.

Publication Information

Hilgardia 10(3):9-14. DOI:10.3733/ca.v010n03p9. March 1956.

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Abstract

The 1955 infestations of the walnut aphid were exceedingly severe in certain areas, such as Linden. By early May, the average number of aphids found—on the next to the terminal leaflets—in some orchards exceeded 50.

Michelbacher A, Oatman E. 1956. Walnut aphid studies in 1955: Experimental systemic aphicide OMPA has outstanding promise but more studies needed before release for commercial use. Hilgardia 10(3):9-14. DOI:10.3733/ca.v010n03p9
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