Numbered Publications: PPFS-OR-W
PPFS-OR-W-25: Dothistroma Needle Blight of Pine
Julie Beale, Walt Reichert, Nicole Gauthier | Jul. 1, 2017 (New)
Dothistroma needle blight disease afflicts some of the pine species commonly planted in Kentucky landscapes, resulting in needle browning and unattractive trees. Austrian pine and Mugo pine are most commonly affected. Dothistroma needle blight is infrequently observed on spruce. A closely related fungal disease called brown spot needle blight occasionally affects Scots pine or white pine, although this disease is less common in Kentucky.
PPFS-OR-W-24: Common Diseases of Spruce in Kentucky
Julie Beale, Brenda Kennedy, Nicole Gauthier | Jun. 1, 2016 (New)
Spruce trees, particularly blue spruce (Picea pungens) and Norway spruce (Picea abies), are popular specimen trees and screening conifers in Kentucky landscapes. Unfortunately, they can present problems for homeowners as a result of poor vigor, dieback, or needle drop. A combination of infectious disease and environmental stress is often to blame.
PPFS-OR-W-10: Black Spot of Rose
Paul Bachi, John Hartman | Feb. 1, 2016 (Reviewed)
Black spot is the most common and serious disease of roses in Kentucky. It is a problem in greenhouse production and outdoor plantings.
PPFS-OR-W-23: Shade Tree Anthracnose
Sharon Flynt, Nicole Gauthier | Feb. 1, 2016 (New)
Anthracnose is the common name given to several fungal shade tree diseases with similar dark, irregularly-shaped leaf lesions. While they are primarily foliar diseases, damage on some hosts may extend to twigs, branches, and buds. In established trees, anthracnose usually does not cause permanent damage. However, resulting defoliation and dieback, especially if it occurs year after year, can weaken trees and make them more susceptible to environmental stresses and secondary pathogens.
PPFS-OR-W-4: "Wet Feet" of Ornamentals
Brad Lee, Tracey Parriman, Nicole Gauthier | Nov. 1, 2015 (New)
"Wet feet" is the common term for a condition that affects plant species intolerant of wet growing conditions. This problem occurs when soils become saturated with water, which, in turn, displaces available oxygen. Roots require oxygen to function; when oxygen is deficient, roots suffocate. Once root damage occurs, plants decline and may eventually die. While "wet feet" is an abiotic disorder and is not caused by infectious organisms, declining root health and wet soil conditions can inhibit the ability of some plants to thrive. This also provides ideal conditions for many root and collar rot water mold pathogens, such as Phytophthora and Pythium.
PPFS-OR-W-1: Tree Wounds: Invitations to Wood Decay Fungi
Bill Fountain, Traci Missun, Nicole Gauthier | Sep. 1, 2015 (New)
Wood decay leads to loss of tree vigor and vitality, resulting in decline, dieback, and structural failure. Wounds play an important part in this process since they are the primary point of entry for wood decay pathogens. While other factors may also result in decline and dieback, the presence of wounds and/or outward signs of pathogens provides confirmation that wood decay is an underlying problem. Wounds and wood decay reduce the ability of trees to support themselves.
PPFS-OR-W-22: When White Pines Turn Brown: Common Problems of White Pines in Kentucky
Julie Beale, Nicole Gauthier | Apr. 1, 2015 (New)
Eastern white pine (Pinus strobus) is a popular conifer in many Kentucky landscapes, although its use may be limited to loose, well-drained, pathogen-free soil. Often, needle browning is the primary symptom that alerts homeowners and nursery growers of health problems. In Kentucky, brown needles on white pine are often caused by one of the following three conditions: white pine decline, white pine root decline (Procerum root rot), or Phytophthora root rot.
PPFS-OR-W-21: Diplodia Tip Blight of Pine
Julie Beale, D.J. Scully, Nicole Gauthier | Jan. 1, 2015 (New)
Tip blight is a serious disease of landscape pines in Kentucky. Pines such as Austrian (Pinus nigra), Scots (P. sylvestris), and Mugo (P. mugo) are most commonly affected. Other landscape conifers occasionally may be affected by tip blight as well. Tip blight disease has not been found on eastern white pine (P. strobus).
PPFS-OR-W-19: Transplant Shock: Disease or Cultural Problem?
Cheryl Kaiser, Mike Klahr, Nicole Gauthier | May. 1, 2014 (New)
When trees and shrubs are moved from one growing site to another (e.g. from nursery to landscape), they endure stress. If care is taken to minimize stress through proper transplanting techniques and maintenance, plants are likely to recover rapidly and become well-established in their new sites. Unfortunately, the opposite usually occurs.
PPFS-OR-W-17: Leaf Scorch and Winter Drying of Woody Plants
Rick Durham, Cheryl Kaiser, Nicole Gauthier | Jun. 1, 2013 (New)
Leaf scorch symptoms can develop whenever water needed for growth and health of plant foliage is insufficient. While symptoms are often due to unfavorable environmental conditions, leaf scorch can also result from an infectious disease. Symptoms, possible causes, and management of leaf scorch are discussed below.
