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
|
|
The shown graphical material is copyrighted. © 2006 BFW Wien. You can use the images for your own publications only if you name the source AND if you have a valid agreement with BFW Vienna. Furthermore images in high resolution are for sale at BFW. In this case please contact (Department of Forest Protection) or , our PR manager.
|