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Prune

Pests Monitored with the Dormant Spur Sample

Names link to more information on identification and management.

Click on photos to enlarge
Mealy plum aphid egg.
Mealy plum aphid egg
Identification tip: Eggs are black, oval, and laid on or adjacent to buds. Waxy filaments (not visible here) may be seen with a hand lens.
No photo available
Leaf curl plum aphid
Identification tip: Closely resembles the mealy plum aphid egg but is smoother and has no waxy filaments.
Healthy San Jose scale nymph.
San Jose scale nymphs (healthy)
Identification tip: The four round, dark scales in the center are the black cap stage, the most common overwintering form. The earlier white cap stage is to left.
Parasitized San Jose scale nymph.
San Jose scale (parasitized)
Identification tip: Scales parasitized the previous season will have a round hole in them where the adult parasite emerged.
European fruit lecanium nymphs.
European fruit lecanium nymphs
Identification tip: Look for legless, immobile yellow insects on twigs. Older nymphs may have brown markings and a distinct center ridge.
European fruit lecanium nymphs.
European fruit lecanium scale (parasitized)
Identification tip: Parasitized lecanium scales, such as the one in the center here, turn black.
 Eggs of European red mite.
European red mite eggs
Identification tip: Masses of eggs may be laid together. Each slightly flattened red egg has a long, spinelike projection, called a stipe, at the top that can be seen with a hand lens.
Brown mite eggs.
Brown mite eggs
Identification tip: Brown mite eggs (shown here with adults) look like those of European red mite, but lack the stipe.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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