Blog Archives

Necrotic Ring Spot and Summer Patch in Kentucky Bluegrass Lawns (PPFS-0R-T-06)

Necrotic ring spot and summer patch are two patch diseases that can be very destructive when Kentucky bluegrass is grown under intensive management. These diseases become a concern in lawns when improper management practices, such as close mowing, promote disease

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Managing Tobamoviruses in Greenhouse Production (PPFS-GH-08)

Tobamoviruses, including tobacco mosaic virus (TMV) and the new tomato brown rugose fruit virus (ToBRFV), can be persistent in greenhouses and other protected cropping environments.  Herbaceous ornamentals, vegetables, and tobacco can be affected by tobamoviruses.  Once introduced into a site,

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Managing Diseases of Herbaceous Ornamentals (PPFS-OR-H-01)

Herbaceous landscape ornamentals can succumb to various adverse factors, including infectious and non-infectious diseases.  Managing Diseases of Herbaceous Ornamentals provides suggestions for symptom recognition and management approaches to common problems of these crops in residential and commercial landscape plantings, greenhouses,

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Foliar Diseases of Cucurbits (PPFS-VG-10)

Alternaria leaf blight, angular leaf spot, anthracnose, downy mildew, and powdery mildew are foliar diseases that commonly affect cucurbit vegetables in Kentucky.  Losses can occur in both commercial and residential plantings.  Vegetables in the cucurbit family include cucumber, gourds, muskmelon

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Tomato Wilt Problems (PPFS-VG-15)

Tomato wilt problems that can occur in both residential and commercial plantings include diseases caused by fungi (Fusarium wilt and Verticillium wilt) and bacteria (southern bacterial wilt). In addition, wilting may be associated with an abiotic disorder (walnut wilt), which

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Cherry Leaf Spot (PPFS-FR-T-06)

Cherry leaf spot occurs on both sweet and sour cherry trees; however, it is considerably more serious on sour cherries. Ornamental flowering cherry trees can also be susceptible to this disease.  Premature defoliation from cherry leaf spot reduces flower bud

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Cleaning & Sanitizing Commercial Greenhouse Surfaces (PPFS-GH-07)

Greenhouse and nursery sanitation practices help prevent the introduction and spread of plant diseases and pests. Being proactive in maintaining a clean growing environment will often be less expensive and more effective than reacting to a disease or pest issue

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Grape Powdery Mildew (video)

Dr. Nicole Gauthier, Plant Pathology Extension Specialist, has created a short video (3:04 minutes) focusing on grape powdery mildew.  This video provides information on disease appearance and prevention. Grape Crown Gall is available online. For additional publications on small fruit

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Black Spot of Rose (PPFS-OR-W-10)

Black spot is the most common and serious disease of roses in Kentucky, affecting susceptible cultivars in greenhouse production and outdoor plantings. This one page fact sheet covers symptoms, cause, disease development, and management options. Black Spot of Rose (PPFS-OR-W-10)

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Laurel Wilt Disease & Redbay Ambrosia Beetle (PPFS-OR-W-28, FORFS-20-01, ENTfact-459)

Laurel wilt is a newly discovered fungal disease first detected in Kentucky in 2019.  While research is ongoing to determine the impact and distribution of both the pathogen and its insect vector (redbay ambrosia beetle), this disease is being considered

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Holcus Leaf Spot (PPFS-AG-C-06)

Holcus leaf spot, a bacterial disease, can be seen sporadically in Kentucky cornfields.  It can be challenging to diagnose because damage from certain contact herbicides can mimic holcus spot.  This publication describes disease symptoms, conditions that favor disease, and how

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Cleaning and Disinfecting Home Garden Tools and Equipment (PPFS-GEN-17)

Dirty tools, containers, and work surfaces come as no surprise to home gardeners. Rinsing with water to remove obvious soil or plant residues is a common practice. However, this type of basic cleaning can fail to remove microscopic plant pathogens

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Considerations for Diagnosis of Ornamentals in the Landscape (PPFS-GEN-15)

Diagnosing landscape plant problems can be challenging. However, an assessment of the entire growing site may aid in the diagnostic process. This publication was designed to provide a starting point for determining possible causes behind various plant problems.  The step-by-step

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Mulch Mushrooms, Slime Molds & Other Saprophytes (PPFS-GEN-06)

Organic mulches, such as shredded cypress and pine bark, are commonly used in commercial and home landscapes. While providing numerous benefits (soil moisture conservation, weed suppression, aesthetics), mulches also provide a substrate for a diverse group of saprophytic organisms (saprobes),

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An IPM Scouting Guide for Common Problems of Peach in Kentucky (ID-260)

Scouting and monitoring crops to determine potential problems before they result in serious economic loss is key to the Integrated Pest Management (IPM) approach. This IPM guide was designed to aid in the identification of common problems encountered in peach

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