Wednesday, May 6, 2009

Landscape - Scale Insects: White Peach Scale

This is the 23nd in a series on scale insects in the landscape. This post is on the White Peach Scale. Information is from the University of Maryland.

White Peach Scale (Pseudaulacaspis pentagona), Family Diaspididae

Plants Damaged: This scale is a general feeder and can be found on several species of plants including holly, privet, cherry laurel, skimmia, mulberry, catalpa, and chinaberry.

Damage Symptoms: Dieback of twigs, yellowing of foliage

Life Cycle: Crawlers appears about 2 weeks later than white prunicola scale. Crawlers are out in mid-May to mid-June. Second generation crawlers are out from mid-July to mid-August. The third generation crawlers are out in September.

Monitoring: Male crawlers are white and female crawlers are salmon colored.

Control: When crawlers are out, Distance mixed with 1% horticultural oil gives excellent control.

Information from "Scales Commonly Encountered in Maryland Landscapes and Nurseries" by Stanton Gill, Extension Specialist in IPM for Nurseries and Greenhouses,and Suzanne Klick and Shannon Wadkins, Technicians, Central Maryland Research and Education Center University of Maryland Cooperative Extension.

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