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Using Silicon to Suppress Hemp Powdery Mildew (PPRR-02)

Powdery mildew is the most common disease of greenhouse hemp.  Most hemp grown for cannabinoid production is propagated by cuttings or started from feminized seed in greenhouses and then moved outdoors.  Powdery mildew can become a limiting factor in these

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Leaf Spot Diseases of Cucurbits (PPFS-VG-10)

Alternaria leaf blight, angular leaf spot, and anthracnose are leaf spotting diseases that commonly affect cucurbit vegetables in Kentucky.  Each of these disease has its preferred host range in the cucurbit family (crops include cucumber, gourd, muskmelon, watermelon, summer squash,

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Sampling for the Tall Fescue Endophyte in Pasture or Hay Stands (PPA-30)

Tall fescue growing in Kentucky can be colonized by the tall fescue endophyte, a fungus which causes disorders in livestock that feed on the infected grass. The first step to minimizing the impact of endophyte-infected grass on herd productivity is

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Managing Diseases with Sanitation Practices

When diseases occur in commercial or residential plantings, it is often presumed that fungicides are the most important and effective disease management tools available.  However, a good sanitation program can help reduce the need for chemical controls and can improve

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Fusarium Wilts of Vegetable Crops (PPFS-VG-15)

Fusarium wilts are common vascular diseases affecting a number of vegetable crops.  In Kentucky, tomato, peppers, eggplant, cucumber, watermelon, and occasionally muskmelon (cantaloupe), are most frequently affected.  Crop losses can occur in commercial fields, greenhouses, high tunnels, and residential plantings.

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Sclerotinia Diseases of Vegetable Crops  (PPFS-VG-29)

Sclerotinia diseases occurring on vegetable crops are commonly referred to as white mold; however they may also be known as timber rot (tomato), drop (lettuce), and head rot (cabbage). Vegetable crops grown in commercial fields, high tunnels, and home gardens

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Diagnosis of “No Disease” (PPFS-GEN-11)

Extension Agents and growers may occasionally receive diagnostic reports from the University of Kentucky Plant Disease Diagnostic Laboratory that indicate “no disease was found.”  The following fact sheet provides possible reasons behind this diagnosis. Diagnosis of “No Disease” (PPFS-GEN-11) is

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Bitter Rot of Apple (PPFS-FR-T-24)

Bitter rot is the most common fruit rot of apple in Kentucky. Trees in both commercial and residential plantings can suffer devastating losses. Growers consider bitter rot the most important fruit rot and the second most destructive disease in Kentucky

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Iron Deficiency of Woody Plants (ID-84)

Iron deficiency is a nutritional problem that can occur in woody and herbaceous plants in landscapes, nurseries, greenhouses, and production fields. It is most often associated with soils that have neutral or alkaline pH (pH 7.0 or above). Plants that

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Stress and Decline in Woody Plants (ID-50)

Woody plant stress has many potential causes that can ultimately lead to decline and death of landscape trees and shrubs. This publication discusses the symptoms and common causes of stress and decline in woody plants.  A brief section on ecology

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Blossom End Rot (CCD-FS-11)

Blossom end rot is a physiological disorder common to many fruiting vegetable crops, especially tomatoes and peppers. Cucurbits, such as cucumber, squash, and watermelon, can also be affected. Physiological disorders are caused by non-living (abiotic) components. In the case of

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Powdery Mildew (PPFS-GEN-02)

Powdery mildew can affect numerous commercial and residential plants, including fruits, vegetables, ornamentals, and agronomic crops. Powdery mildew may adversely affect flowering, fruit development, plant vigor, and yields, although this disease rarely kills plants outright. Plants that become stressed by

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How Dry Seasons Affect Woody Plants (ID-89)

Pattern, frequency, and amounts of rainfall are important components to plant health. During dry seasons and drought conditions, plants become stressed. Growth ceases, nutrient transport slows, and plants wilt as cells become water-deficient. Severe, long-term, or consecutive drought events may

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Submitting Plant Specimens for Disease Diagnosis (PPFS-GEN-09)

The accurate diagnosis of a plant problem is critical to knowing what strategies will be needed for current management and/or prevention of future problems.  When diagnostic assistance is needed, Kentucky homeowners and commercial growers can submit plant samples to their

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Blackberry Rosette (Double Blossom) (PPFS-FR-S-03)

Blackberries are a popular fruit grown for both home and commercial production in Kentucky. A significant challenge, however, is the presence of several fungal diseases that require careful cultivar selection and management during the growing season. Blackberry rosette, also known

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