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Phomopsis blight of juniper is a foliar disease discovered in 1917 [1] 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.
The most direct method of control is to exterminate juniper hosts near pear trees, though spores can travel at least 6 km from one host to another. If there is a chance of infection, spraying pear trees with a fungicide in spring and summer (typically a systemic one that is certified as capable of dealing with rust) may help, although this is ...
Removing as many cedar trees within close proximity of an apple orchard will reduce potential sources of inoculum. The closer the tree to the orchard the greater impact removal will have. Removing all junipers within the 4–5 miles (6.5–8 km) would provide complete control of the disease. [10]
Juniperus ashei (Ashe juniper, mountain cedar, blueberry juniper, post cedar, or just cedar) is a drought-tolerant evergreen tree, native from northeastern Mexico and the south-central United States to southern Missouri. The largest areas are in central Texas, where extensive stands occur.
This mistletoe parasitizes species of juniper, including Utah (Juniperus osteosperma), Rocky Mountain (J. scopulorum), and western juniper (J. occidentalis). [ 3 ] It is a shrub producing many erect and spreading yellow-green branches 20 to 40 centimeters long from a woody base where it attaches to its host tree, tapping the xylem for water and ...
Some junipers are susceptible to Gymnosporangium rust disease and can be a serious problem for those people growing apple trees, an alternate host of the disease. Juniper is the exclusive food plant of the larvae of some moths and butterflies, including Bucculatrix inusitata, juniper carpet, Chionodes electella, Chionodes viduella, juniper pug ...
Blight is a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. [1] Accordingly, many diseases that primarily exhibit this symptom are called blights.
Juniperus scopulorum is a small evergreen tree that in favorable conditions may reach as much as 20 metres (66 feet) in height. [4] However, on sites with little water or intense sun it will only attain shrub height, and even those that reach tree size will more typically be 4.6–6.1 metres (15–20 feet) tall in open juniper woodlands. [5]