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Plant Sciences Commons™

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Utah State University

Series

Plant Pathology

Articles 1 - 12 of 12

Full-Text Articles in Plant Sciences

Dwarf Bunt In Winter Wheat, Justin Clawson, Claudia Nischwitz, Margaret Krause, Will Krause Jan 2023

Dwarf Bunt In Winter Wheat, Justin Clawson, Claudia Nischwitz, Margaret Krause, Will Krause

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Dwarf bunt or stinking smut is a disease that impacted Utah winter wheat production in the 1930s, resulting in fields with 95% infections. Breeding and selection of resistant varieties has irradiated the disease. As organic production of winter wheat increases, selecting resistant varieties will become of utmost importance to prevent crop loss.

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The Backyard Garden - Leafy Greens Pests, Nick Volesky, Marion Murray Nov 2022

The Backyard Garden - Leafy Greens Pests, Nick Volesky, Marion Murray

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This fact sheet provides information about the diseases that affect leafy greens. It includes general information, other hosts, disease symptoms to watch for, and management options.

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The Backyard Garden - Cole Crops Pests, Nick Volesky, Marion Murray Nov 2022

The Backyard Garden - Cole Crops Pests, Nick Volesky, Marion Murray

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This fact sheet contains information about pests and diseases that affect cole crops. Cole crops are plants that belong to the mustard (Brassica) family, including hardy, cool-season crops such as broccoli, kohlrabi, cabbage, rutabaga, cauliflower, kale, Brussels sprouts, and turnips. The fact sheet offers general information and guidance on severity, other hosts, symptoms, and management.

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The Backyard Garden - Tomato Pests, Nick Volesky, Marion Murray Nov 2022

The Backyard Garden - Tomato Pests, Nick Volesky, Marion Murray

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This fact sheet contains information about pests and diseases that affect tomatoes. It includes general information and guidance on severity, other hosts, symptoms, and management.

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Abiotic Disorders Of Tomatoes, Nick Volesky, Marion Murray, Sheriden M. Hansen, Maegen A. Lewis Apr 2022

Abiotic Disorders Of Tomatoes, Nick Volesky, Marion Murray, Sheriden M. Hansen, Maegen A. Lewis

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Monitoring tomato plants regularly from seedling to harvest allows for early detection of abnormal conditions. Although tomato plants can be attacked by a variety of living organisms (insects, mites, pathogens, vertebrates), nonliving (abiotic) conditions can cause just as much damage. Abiotic diseases in tomato plants can arise from nutrient deficiencies, temperature extremes, abnormal lighting, chemical application, changes in water uptake, mechanical damage, genetic mutations, and more. This guide will cover most of the abiotic disorders and diseases that can affect tomatoes in Utah.

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Big Bud Disease In Tomatoes And Peppers, Claudia Nischwitz, Erin Petrizzo Apr 2022

Big Bud Disease In Tomatoes And Peppers, Claudia Nischwitz, Erin Petrizzo

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This fact sheet provides information on the symptoms of big bud on tomatoes and peppers. It reviews the disease cycle and recommendations on controlling beet leafhopper and managing big bud disease in Utah.

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Fusarium And Verticillium Wilts Of Vegetables, Nick Volesky, Marion Murray, Claudia Nischwitz Feb 2022

Fusarium And Verticillium Wilts Of Vegetables, Nick Volesky, Marion Murray, Claudia Nischwitz

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Fusarium wilt and Verticillium wilt are soilborne plant diseases that attack vascular tissue. They cause similar symptoms in their hosts and are difficult to manage as they can survive in the soil for many years. Once a plant is infected, there is no treatment or cure. Therefore, management should focus on preventive and cultural control practices. This fact sheet identifies the many vegetables susceptible to these pathogens in Utah and reviews symptoms, diagnosis, and ways to prevent these diseases.

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Vegetable Diseases Of Utah, Claudia Nischwitz, Marion Murray, Nick Volesky Feb 2022

Vegetable Diseases Of Utah, Claudia Nischwitz, Marion Murray, Nick Volesky

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This guide provides a list of vegetable crop diseases that have been documented in Utah along with some that are likely to occur. Plant diseases are caused by pathogens such as fungi, bacteria, viruses, and fungal-like organisms. Diagnosing specific plant diseases takes careful observation of signs, symptoms, and sometimes culturing and molecular testing in a laboratory setting.

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Lily Leaf Beetle, Ann Mull, Lori R. Spears Nov 2021

Lily Leaf Beetle, Ann Mull, Lori R. Spears

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The lily leaf beetle (LLB) (Coleoptera: Chrysomelidae) is an important pest from Eurasia that threatens native and cultivated true lilies (Lilium spp.) and fritillaries (Fritillaria spp.). It is also known as the red lily leaf beetle or scarlet lily beetle. LLB was first reported in North America in Montréal, Canada, in 1945 and in the U.S. in 1992 in Massachusetts, likely arriving via European shipments of lily bulbs. LLB has been detected in nine of the 10 Canadian provinces and 14 U.S. states, including the New England states, Pennsylvania, Wisconsin, Minnesota, and Washington (EDDMapS, 2021). Based on LLB’s native distribution …

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Powdery Mildews On Vegetables, Nick Volesky, Marion Murray, Claudia Nischwitz Aug 2021

Powdery Mildews On Vegetables, Nick Volesky, Marion Murray, Claudia Nischwitz

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Powdery mildew is one of the most easily recognized fungal plant diseases. It is categorized by spots or patches of white-to-gray powder-like growth on foliage, stems, or fruit. Roughly 700 species exist that infect grasses, ornamentals, weeds, fruit trees, landscape trees, shrubs, and vegetables. The closely related species of fungi that cause powdery mildew are host-specific, meaning they cannot survive without the proper host. Powdery mildew fungi spread in conditions of low rainfall and hot temperatures, making Utah’s climate the perfect environment. This fact sheet provides information on powdery mildew and its management.

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Corn Smut (Ustilago Maydis), Kalen Taylor, Nick Volesky, Claudia Nischwitz, Marion Murray Jul 2021

Corn Smut (Ustilago Maydis), Kalen Taylor, Nick Volesky, Claudia Nischwitz, Marion Murray

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Corn smut is caused by the fungus Ustilago maydis. Smut rarely occurs in Utah and is not considered economically important for grain production. For home gardeners and small farms, serious smut infections on sweet corn can cause ears to be inedible. U. maydis spreads from plant to plant by wind-borne or water-splashed spores onto silks or through existing wounds. Therefore, keeping corn plants insect- and disease-free reduces the number of entry points for infections. This fact sheet reviews the disease cycle, identification, and management.

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Mancha Anular Necrótica Y Mancha De Verano Del Césped, Claudia Nischwitz, Kelly Kopp, Jaydee Gunnell, Kent Evans, Erin Frank, Celina Wille Apr 2021

Mancha Anular Necrótica Y Mancha De Verano Del Césped, Claudia Nischwitz, Kelly Kopp, Jaydee Gunnell, Kent Evans, Erin Frank, Celina Wille

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La mancha anular necrótica y mancha de verano del césped son enfermedades fúngicas que infectan los pastos de estación fría y causan síntomas similares. Los síntomas comienzan como un crecimiento deficiente y marchitez de las hojas, que se convierten en parches marrones obvios que varían de 1 a 3 pies de diámetro. Debido a los síntomas similares que se observan en la infección por ambos patógenos, se necesita un microscopio para diagnosticar adecuadamente cada enfermedad. El manejo de ambas enfermedades puede ser difícil y frecuentemente requiere una combinación de técnicas de control cultural, químico y varietal.

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