Phomopsis Twig Blight

Twigs on junipers progressively die back from the branch tips downward, starting in spring as new growth begins. Infected branches show a grayish discoloration and dieback pattern. Small dark fruiting bodies (pycnidia) appear on dead twig tissue, producing spores that spread during wet weather. Environmental stress, winter damage, or wounding from mechanical injury often precedes symptom development. Severe infections can kill entire branches or even the plant.

Phomopsis twig blight on junipers is manageable with resistant cultivars and vigilant pruning. Plant varieties like Juniperus chinensis 'Pfitzeriana Aurea', J. sabina 'Arcadia', or J. scopulorum 'Silver King', which show better resistance than others. Prune out infected twigs immediately when you spot them, cutting well below the diseased area, and avoid wounding plants during establishment. Clean tools between cuts and manage water to avoid excess moisture on foliage that promotes spore germination.