Scouting for diseases: Juniper tip blight

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.  

Phomopsis juniperovora and Kabatina juniperi (fungi)

Hosts: Juniper and rarely arborvitae, cryptomeria and chamaecyparis are susceptible to infection by these fungi. Susceptibility varies widely among species and cultivars.

Symptoms: Both fungi produce similar symptoms; time of symptom appearance differs.

Phomopsis tip blight:
This fungus overwinters in small black fruiting bodies
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Phomopsis infections begin at or near the
branch tips of new growth and progress down
the stem toward the older growth. Branch tips
of infected new growth turn light green, then
brown, then ash-gray. New fruiting bodies
(pycnidia) can form within 3 to 4 weeks after

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