Hilgardia
Hilgardia
Hilgardia
University of California
Hilgardia

Soft scales on walnut in 1956: Increase in soft scale populations on walnuts in northern California effected by several factors in complex problem

Authors

A. E. Michelbacher
Stephen W. Hitchcock

Authors Affiliations

A. E. Michelbacher is Professor of Entomology, University of California, Berkeley; Stephen W. Hitchcock is Research Assistant, University of California, Berkeley.

Publication Information

Hilgardia 11(3):7-14. DOI:10.3733/ca.v011n03p7. March 1957.

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Abstract

Destructive populations of soft scales—frosted scale, Lecanium pruinosum, Coq.; European fruit lecanium, L. corni Bouché: and the calico scale, L. cera-sorum Ckll.—occurred on walnuts in many locations in northern California during 1956.

Michelbacher A, Hitchcock S. 1957. Soft scales on walnut in 1956: Increase in soft scale populations on walnuts in northern California effected by several factors in complex problem. Hilgardia 11(3):7-14. DOI:10.3733/ca.v011n03p7
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