Numbered Publications: PPFS-OR-W
PPFS-OR-W-12: Bacterial Leaf Scorch of Shade Trees
Nicole Gauthier | Nov. 30, 2021 (Major Revision)
Bacterial leaf scorch has devastated many landscape and shade trees in Kentucky's urban forests in recent years. Especially hard hit have been the mature pin oaks lining many urban streets. First diagnosed in the U.S. in the early 1980s, this epidemic shows no signs of abating.
PPFS-OR-W-30: Common Problems of Common Trees: An Index
Ellen Crocker, Jamie Dockery, Nicole Gauthier, Jonathan Larson, Kimberly Leonberger | Jul. 19, 2021 (New)
PPFS-OR-W-31: Common Problems of Common Shrubs: An Index
Ellen Crocker, Jamie Dockery, Nicole Gauthier, Jonathan Larson, Kimberly Leonberger | Jul. 19, 2021 (New)
PPFS-OR-W-11: Juniper Twig Blights
Nicole Gauthier, Carrie Spry | Mar. 29, 2021 (Major Revision)
Twig and branch dieback is a common sight in many juniper plantings in Kentucky. While other factors can cause these general symptoms, two fungal diseases are frequently responsible for the dieback.
PPFS-OR-W-14: Fungicides for Management of Landscape Woody Ornamental Diseases
Nicole Gauthier | Mar. 20, 2021 (Minor Revision)
This guide is a decision-making tool to help growers select fungicides from different chemical classes (FRAC). Additional information can be found in a number of UK Cooperative Extension Service publications or by contacting county Extension agents.
PPFS-OR-W-28: Laurel Wilt Disease and Redbay Ambrosia Beetle
Ellen Crocker, Tyler Dreaden, Nicole Gauthier, Jonathan Larson, Kimberly Leonberger | Jul. 8, 2020 (New)
Laurel wilt is a newly discovered fungal disease that presents a major threat to sassafras in Kentucky. The disease was first detected in the U.S. in 2003 and in southwestern Kentucky in 2019. Currently, laurel wilt is known to occur in eleven southeastern states bordered by Kentucky (north), North Carolina (east), Florida (south), and Texas (west). Research is ongoing to determine the impact and distribution of both the laurel wilt fungus and the redbay ambrosia beetle that carries it.
PPFS-OR-W-27: Canker Sampling of Trees and Woody Ornamentals
Kimberly Leonberger, Nicole Gauthier | Mar. 1, 2019 (New)
Cankers on woody plants can result in dieback, decline, structural failure, or plant death. Cankers form when plant pathogens enter woody tissues. Plants stressed by poor planting practices, improper maintenance, extreme weather, insect damage, mechanical damage, or other wounds are at increased risk for infection by canker causing pathogens.
PPFS-OR-W-20: Boxwood Blight
Jamie Dockery, Nicole Gauthier | Aug. 1, 2018 (Major Revision)
Boxwood blight is a disease of boxwood (Buxus spp.), causing rapid defoliation and plant dieback. The fungal disease is particularly devastating to American boxwood cultivars, which can defoliate within a week and die within one growing season. Plants are eventually weakened by repeated defoliation and dieback, and resulting plant stress and consequent colonization by secondary invaders result in plant death.
PPFS-OR-W-26: Volutella Blight of Boxwood
Adam Leonberger, Nicole Gauthier | Aug. 1, 2017 (New)
Volutella blight (also called Pseudonectria canker) is the most common disease of boxwood in Kentucky landscapes and nurseries. This disease is caused by an opportunistic fungal pathogen that attacks leaves and stems of damaged or stressed plants. Winter injury, poor vigor, and stem wounds increase risk for Volutella blight. All species and cultivars of boxwood are susceptible.
PPFS-OR-W-6: Flowering Dogwood Diseases
Sarah Stolz, Nicole Gauthier | Aug. 1, 2017 (Major Revision)
The flowering dogwood is one of the most popular ornamental trees in Kentucky landscapes. Different cultivars, as well as different species and hybrids, offer a variety of flower and plant characteristics. Unfortunately, some common diseases can threaten the health of dogwood in both residential and commercial settings.
