Hilgardia
Hilgardia
Hilgardia
University of California
Hilgardia

Soft scales infesting walnut: Chemical control required when natural mortality factors are disturbed by treatments directed against other insect pests

Authors

A. E. Michelbacher
Howard L. McKenzie
C. Q. Gonzales

Authors Affiliations

A. E. Michelbacher is Professor of Entomology, University of California, Berkeley; Howard L. McKenzie is Associate Entomologist, University of California, Davis; C. Q. Gonzales is Research Assistant in Entomology, University of California, Berkeley.

Publication Information

Hilgardia 13(5):6-6. DOI:10.3733/ca.v013n05p6. May 1959.

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Abstract

Four species of soft scales–a complex of two species of frosted scale, European fruit lecanium, and the calico scale– can inflict serious damage on walnuts unless controlled, either by natural factors or through the use of insecticides.

Michelbacher A, McKenzie H, Gonzales C. 1959. Soft scales infesting walnut: Chemical control required when natural mortality factors are disturbed by treatments directed against other insect pests. Hilgardia 13(5):6-6. DOI:10.3733/ca.v013n05p6
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