Numbered Publications by Nicole Ward Gauthier
PPFS-GH-8: Managing Tobamoviruses in Greenhouse Production
Nicole Ward Gauthier | May. 13, 2021 (Minor Revision)
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, these viruses can spread rapidly, reducing plant quality and yields. Prevention and careful sanitation are important to maintaining a virus-free production environment for current and future crops.
PPFS-GEN-18: Edema
Nicole Ward Gauthier, John Hartman | May. 10, 2021 (Major Revision)
Edema is a non-parasitic disorder which, under the right environmental conditions, can affect a wide variety of herbaceous plants. We most frequently observe this problem on indoor plants, such as dracaena, geranium and schefflera. Edema tends to be more of a problem in greenhouses, but it may also occur on plants grown in homes and offices. Field and garden grown crops, such as cabbage, may also be affected.
PPFS-GH-4: Greenhouse Sanitation
Nicole Ward Gauthier, Kenny Seebold | May. 6, 2021 (Minor Revision)
Diseases are a major concern for greenhouse growers and can be a key limitation to profitable plant production. Disease management in greenhouses is critical because the warm, humid environment in these structures provides optimal conditions for reproduction of many pathogens. When disease management is neglected, pathogen populations build-up and continue to increase as long as there is susceptible plant tissue available for infection and disease development. Infected plant tissue, infested soil, and pathogen inoculum (such as spores, bacterial cells, virus particles, nematode eggs) all serve as sources of pathogens that can later infect healthy plants.
PPFS-VG-11: Bacterial Wilt of Cucurbits
Ric Bessin, Nicole Ward Gauthier | Apr. 13, 2021 (Major Revision)
Bacterial wilt is a common, often destructive, disease of cucurbits. This disease can cause nearly complete losses of a planting before the first harvest. Bacterial wilt primarily affects cucumber and muskmelon (cantaloupe). While squash and pumpkin are also susceptible, the damage to these hosts is usually less severe.
PPFS-OR-W-11: Juniper Twig Blights
Nicole Ward 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-GH-3: Fungicides for Management of Diseases in Commercial Greenhouse Ornamentals
Nicole Ward Gauthier | Mar. 25, 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-FR-S-5: Strawberry Anthracnose Fruit and Crown Rot
Nicole Ward Gauthier, Shawn Wright | Mar. 22, 2021 (Major Revision)
Anthracnose can be a serious problem in Southern and Midwestern strawberry plantings. The disease may appear as a fruit or crown rot, both of which severely reduce plant stands and yields. Fruit rot, the most common form of anthracnose, appears as fruit begins to ripen in late spring. Crown rots, on the other hand, can develop in young plants soon after planting or when weather warms in spring.
PPFS-OR-W-14: Fungicides for Management of Landscape Woody Ornamental Diseases
Nicole Ward 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-FR-T-16: Sooty Blotch and Flyspeck of Apple
Nicole Ward Gauthier | Jan. 26, 2021 (New)
Sooty blotch and flyspeck (SBFS) is a common late summer disease complex. The resulting superficial blemishes do not cause fruit decay, but they can reduce market value for commercial produce. Infections of the waxy cuticle can also shorten storage life, as it allows for accelerated desiccation during refrigerated storage.
PPFS-FR-S-6: Rust Diseases of Brambles
Nicole Ward Gauthier, Jessica Sayre | Jan. 5, 2021 (Major Revision)
The three most important rust diseases occurring on brambles in Kentucky are cane and leaf rust, late rust, and orange rust. The most destructive of these diseases is orange rust, which is ultimately lethal to plants. Once infected, entire plants must be removed and destroyed. In contrast, cane and leaf rust, along with late rust, are not lethal to plants and can be managed using cultural practices and fungicides. Distinguishing between these rust diseases is critical for proper management.
