PPFS-OR-W-18: Verticillium Wilt of Woody Plants

Cheryl Kaiser, Nicole Gauthier | Mar. 1, 2013 (New)

Verticillium wilt can affect a wide range of ornamental trees and shrubs, as well as a number of tree fruits and woody small fruits. Over 400 herbaceous and woody plant species have been reported as hosts for this disease.

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PPFS-OR-W-3: Black Root Rot of Ornamentals

Paul Bachi, Julie Beale, Cheryl Kaiser, Nicole Gauthier | May. 1, 2012 (Minor Revision)

Black root rot can affect a wide range of ornamentals in home and commercial landscapes, nurseries, and greenhouses. In Kentucky, this disease is commonly observed on Japanese and blue hollies, inkberry, pansy, petunia, and vinca. In addition to ornamentals, numerous vegetable and agronomic crops are susceptible.

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PPFS-OR-W-16: Rose Rosette Disease

Cheryl Kaiser, Nicole Gauthier | May. 1, 2012 (New)

Rose rosette is a devastating disease that is a threat to virtually all cultivated roses (Rosa spp.) in Kentucky, regardless of cultivar. Even rose cultivars known for their exceptional disease resistance and hardiness are susceptible to rose rosette disease. Losses can occur in home and commercial landscapes, nurseries, and botanical garden plantings.

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PPFS-OR-W-15: Sample Submission Protocol for Diagnosis of Thousand Cankers Disease in Walnut

Paul Bachi, Julie Beale, Brenda Kennedy, Nicole Gauthier | Feb. 1, 2012 (New)

Thousand cankers disease (TCD) is a fatal disease of black walnut (Juglans nigra), and most recently, butternut (Juglans cinerea). The disease complex involves a fungus that is carried to trees by the walnut twig beetle, causing numerous cankers on branches and killing trees 5 to 6 years after infection. The disease complex is widespread in the western U.S., and has recently been identified in Tennessee, Pennsylvania, and Virginia.

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PPFS-OR-W-5: Shoestring Root Rot: A Cause of Tree and Shrub Decline

John Hartman | May. 1, 2005 (Minor Revision)

Most woody landscape plants are susceptible to shoestring root rot, cause of dieback and decline in the landscape. Diagnosis of this problem requires close examination of the base of the trunk which often reveals loose or decayed bark and dead cambium. By peeling back the bark one can often observe dark brown rhizomorphs (thick strands of hyphae), resembling narrow "shoestrings."