Master Gardener Decision Support Guide

Woody Ornamentals

Juniper

Short cuts for Juniper Answers

The following problems are listed for this plant and considered when developing the diagnostic key. If the caller provides accurate answers to the questions, the ones that are linked should key out to that specific problem. The unlinked problems are expected to key to the point where the caller is asked to submit a sample. These samples will often require diagnostic procedures such as soil testing, pathogen culture, Elisa or other test beyond the resources of the average Master Gardener Volunteer or County Extension Agent.

Insects:

Scale:
Carulaspis juniperi (juniper scale)
Fiorinia juniperi (juniper fiorinia scale)
Hemiberlesia rapax (greedy scale)
Parthenolecanium corni (European Fruit lecanium scale)
Parthenolecunium fletcheri (Fletcher Scale)

Aphids:
Cinara sabinae (Cinara aphid)
Cinara tujafilina (Cinara aphid)
Mindarus abietinus (balsam twig aphid)

Caterpillars:
Elcles imperialis (imperial moth)
Epinotia subviridis (cypress leaftier)
Lymantria dispar (gypsy moth)
Thyridopteryx ephemeraeformis (bagworm)
Dichomeris marginella (Juniper webworm)

Mites:
Oligonychus ununguis (Spruce spider mites)
? (False spider mites)
Trisetacus sp. (Eriophyid mites)

Other:
Clastoptera sp (spittlebug)
Susana cupressi (cypress sawfly)
? (juniper midge)

Diseases:
Gymnosporangium sp. (Cedar apple rust)
Gymnosporangium sp. (Cedar hawthorn rust)
Phomopsis juniperovora (Phomopsis twig blight)
Seiridium cardinale (Twig blight)
Kabatina juniperi (Twig blight)
Phytophera sp. (Root rot)

Environmental:
Interior needle dieback

Return to Junipers, Woody Ornamentals, Master Gardener Decision Support Guide

Designed by David Goforth on December 30, 1997.
Contents modified on February 16, 1998.
Contents checked on February 16, 1998.