UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

Nectarine

San Jose Scale and Natural Enemies

Underlined names link to more information on identification and biology.

Click on photos to enlarge
San Jose scale.
San Jose scale (male)
Identification tip: Adult male San Jose scales have well developed legs, a single pair of wings, long antennae, and a thin brown band across the thorax. This male is caught in a pheromone trap.
Mature female San Jose scale.
San Jose scale (mature female)
Identification tip: Mature female San Jose scale is covered by a grayish, flattened, circular shell, about 0.125 inch diameter, with a distinct nipple (center). The immature male (above female) is elongate.
San Jose scale crawlers.
San Jose scale crawlers
Identification tip: San Jose scale crawlers are bright yellow and tiny (about the size of the sharp end of a pin), with well-developed eyes, antennae, and legs.
Aphytis aonidiae.
Aphytis aonidiae
Identification tip: Adult Aphytis aonidiae, a parasite of San Jose scale, is a tiny yellow wasp with short antennae and fringed wings. Shown here laying an egg in a scale.
Encarsa perniciosi.
Encarsia perniciosi
Identification tip: Scale parasite, Encarsia perniciosi, caught in pheromone trap used to monitor flights of male San Jose scale. It is a tiny, dark wasp with short stubby antennae.
Parasitized San Jose scale.
San Jose scale (parasitized)
Identification tip: The exit hole in the covering of the scale (left) indicates that a parasite has emerged.


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2014 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/C540/m540bptrpdsanjose.html revised: April 25, 2014. Contact webmaster.