Carulaspis juniperi

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Author: Eric Day, Virginia Tech

5123033
Taxonomy
Kingdom: Animalia
Phylum: Arthropoda
Class: Hexapoda (including Insecta)
Order: Hemiptera
Family: Diaspididae
Genus: Carulaspis
Species: juniperi
Scientific Name
Carulaspis juniperi
(Bouché)
Common Names

juniper scale

Contents

Plants Attacked

Junipers.

Description of Damage

Needles in area of feeding become yellowish or straw colored and die. Damaging stages - all stages.

Identification

Males most easily observed. They have an elongate white covering with a yellow cap at one end. The female coverings are circular and tan in color. The female under the cover is also circular and yellow in color.

Life History

Fifteen to forty eggs are laid beneath female scale about the first of May. Hatching occurs about the first of June. The crawlers settle shortly after hatching and begin feeding. The females have 3 instars, the males, 5 instars. The males do not overwinter. They develop by fall, emerge, mater, and die soon after. One or two generations per year. Overwintering stage - fertilized adults.

Control

At least 2 sprays 1 week apart beginning about the first of June. Eggs hatch over a period of 2 weeks or more. Dormant sprays help but are not thoroughly effective. Oils are not as effective as lime sulfur, but lime sulfur severely stains white paint, woodwork, and stone work.

Remarks

We still lack a thoroughly effective control. Control measures should be applied for 2-3 years to clear up infestations.

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