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shrubs and grasses


Volutella Blight of Boxwood

8/1/2017 (new)
Authors: Adam Leonberger, Nicole Ward Gauthier

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.

Departments: County Extension, Plant Pathology
Series: Woody Ornamental Disease: Plant Pathology Factsheet (PPFS-OR-W series)
Tags: garden and landscape, plant diseases, shrubs and grasses
Size: 1.57 mb
Pages: 4


Managing Diseases of Herbaceous Ornamentals

5/1/2017 (new)
Authors: Jay Hettmansperger, Nicole Ward Gauthier

Herbaceous landscape ornamentals can succumb to various adverse factors, including infectious and non-infectious diseases. Infectious diseases are caused by microorganisms, such as fungi, fungus-like water molds, bacteria, nematodes, viruses, and phytoplasmas. Abiotic or non-infectious diseases may be attributed to unfavorable growing conditions, which can include nutritional deficiencies, improper soil pH, extreme temperatures, excessive soil moisture, or drought. In order to determine the proper course of action for treatment, it is essential to accurately identify the specific cause(s).

Departments: County Extension, Plant Pathology
Series: Ornamental Plant Disease: Plant Pathology Factsheet (PPFS-OR-H series)
Tags: garden and landscape, plant diseases, shrubs and grasses, trees
Size: 3.14 mb
Pages: 19


What's Wrong with My Taxus?

6/5/2013 (major revision)
Authors: Rick Durham, Cheryl Kaiser, Lee Townsend, Nicole Ward Gauthier

Taxus (yew) is an evergreen shrub commonly found in Kentucky landscapes. Numerous conditions can cause these shrubs to exhibit yellowing and browning symptoms. While diseases and insect pests can result in damage, Taxus troubles are often the result of adverse growing conditions. Pinpointing the specific cause requires a thorough examination of the affected shrub, an investigation of the surrounding area, and knowledge of possible stress factors.

Departments: Entomology, Horticulture, Plant Pathology
Series: Interdepartmental (ID series)
Tags: garden and landscape, shrubs and grasses
Size: 2.30 mb
Pages: 4