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Phomopsis-disease of Cupressaceae - Phomopsis juniperivora | deutsch

Symptoms    Blight of scales, shoots, twigs and branches; junipers often show large brown areas in the crown (see figure 6), which later on turn grey. Sequoiadendron with typical single redbrown twigs of a few cm length dispersed in the crown; disease often begins at the shoot tip; seedlings commonly die. From the bark numerous black, minute and elevated fruiting bodies emerge, which release colourless spores (hand-lens!).
Impact    One of the most common diseases of various junipers; othe members of the Cypress-family usually with slighter damage, occasionally striking symptoms; infection is favoured by stand density, shading, hollow sites or high humidity, in addition by high and long lasting precipitation, misapplied fertilizers or frost; possibilities of errors: Botryosphaeria-canker of Giant Sequoia, Phytophthora- collar- or root rot.
Control    Fungicides (see Official Register of Plant Protection); removal of disaesed plants; avoidance of sites with stagnant air; no or only slight fertilisation, not too late in the season!
Hosts   Thuja; Giant sequoia; Leyland cypress; False Cypress; Juniper; Juniper cultivars;
Affected plant parts    Leaf; Shoot/Twig/Branch; Stem;


Phomopsis juniperivora: Giant Sequoia, scattered dieback
Phomopsis juniperivora: Giant Sequoia, scattered dieback
Phomopsis juniperivora: Giant Sequoia, dieback of twigs
Phomopsis juniperivora: Giant Sequoia, fruiting bodies
Phomopsis juniperivora: spores (Beta-form)
Phomopsis juniperivora: symptoms on juniper

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