page_title: Phomopsis blight of juniper
section_title: Management
hierarchical_section_title: Phomopsis blight of juniper / Management
caption_attribution_description: English: A resistant juniper tree surrounded by junipers infected with Phomopsis juniperova
context_page_description: Phomopsis blight of juniper is a foliar disease discovered in 1917 caused by the fungal pathogen Phomopsis juniperovora. The fungus infects new growth of juniper trees or shrubs, i.e. the seedlings or young shoots of mature trees. Infection begins with the germination of asexual conidia, borne from pycnidia, on susceptible tissue, the mycelia gradually move inwards down the branch, and into the main stem. Management strategies mainly include removing and destroying diseased tissue and limiting the presence of moisture on plants. Junipers become resistant to infection as they mature and the young yellow shoots turn dark green. Preventive strategies include planting only resistant varieties and spraying new growth with fungicide until plants have matured.
context_section_description: Planting only resistant varieties of juniper is the most efficient method of preventing Phomopsis blight.  For information on resistant cultivars contact a local extension office. If blight is already established in a population, then the most effective management strategies include sanitation and chemical application to prevent further infection.  The infectious spores are transported to new host tissue via wind, water, insects, human handling, and equipment. Therefore, careful preventive measures, sanitation methods, and management strategies are required to restrict the movement of disease from host to host.
caption: A resistant juniper tree surrounded by junipers infected with Phomopsis juniperova
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