Hilgardia
Hilgardia
Hilgardia
University of California
Hilgardia

Control of the frosted scale: Tests in southern California indicate parathion sprays effective treatment against pest on walnut

Author

J. C. Ortega

Author Affiliations

J. C. Ortega is Associate Specialist in Entomology, University of California, Riverside.

Publication Information

Hilgardia 8(1):10-10. DOI:10.3733/ca.v008n01p10. January 1954.

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Abstract

The frosted scale–Leeanium pruninosum Coq.–is a large, convex black scale about 5/16” long and is covered with a frostlike wax. The eggs are oval and pearly white when first laid, but as they develop under the female scale they turn darker. When ready to hatch they are pale brown in color. The hatch starts early in May and continues into July or–in some areas–into August.

Ortega J. 1954. Control of the frosted scale: Tests in southern California indicate parathion sprays effective treatment against pest on walnut. Hilgardia 8(1):10-10. DOI:10.3733/ca.v008n01p10
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