Plants Get Sick, Too: Backyard Garden Solutions
Nicole Ward Gauthier
·This board will highlight common dieseases of Kentucky gardens.
Last updated 3 years ago
Blackberry Rosette (Double Blossom)(PPFS...
Blackberry Rosette (Double Blossom) Blackberries are a favored 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 as double blossom, is one of these diseases.
Nicole Ward Gauthier
From Tree Thief to Holiday Tradition: Th...
From Tree Thief to Holiday Tradition: The Story of Mistletoe Once autumn leaves have fallen, mistletoe becomes highly visible on large trees throughout Kentucky. Phoradendron, the scientific name for Kentucky’s most common type of this parasitic plant, means tree thief. These small leafy plants are commonly found on twigs and branches of many hardwood species in the southern United States. Mistletoe extracts (steals) water, mineral elements, and food from tree hosts; hence the name.
Nicole Ward Gauthier
“Wet Feet” of Ornamentals
“Wet Feet” of Ornamentals “Wet feet” is the common term for a condition that affects plant species intolerant of wet growing conditions. This problem occurs when soils become saturated with water, which ultimately causes roots to suffocate. Once root damage occurs, plants decline and may eventually die. While “wet feet” is an abiotic disorder, declining root health and wet soil conditions can provide the ideal environment for infection by many root and collar rot pathogens.
Nicole Ward Gauthier
Black Knot Black knot is a common, often serious, disease of plums and cherries in Kentucky. Trees in both commercial and residential plantings are susceptible to the disease. Black knot results in knotty growths that, over time, encircle limbs and result in branch death.
Nicole Ward Gauthier
Fruit, Orchard, and Vineyard Sanitation:...
Fruit, Orchard, and Vineyard Sanitation: Cleaning Up Today May Keep Disease Away Autumn has arrived in Kentucky, and as the last of the fruit has been harvested, it is time to focus on fruit, orchard, and vineyard sanitation. Good sanitation practices can help reduce disease-causing pathogens. These organisms can survive for months or years on dead plant material or in soil, causing infections in subsequent years. Elimination of disease-causing organisms reduces the.....
Apple Production Practices and Pest Mana...
Apple Production Practices and Pest Management During the past 10 years, orchard practices in Kentucky have changed dramatically. Many of these practices contributed to conditions conducive for diseases and pests. Growers began to shift from traditional plant spacing to high density plantings, increasing tree stress and humid microclimates conducive for diseases. Smaller trees, however, reduce pruning labor and enable better spray coverage as compared with larger tress.
Strawberry Viruses There are several virus diseases that can affect strawberry. They occur rarely or infrequently, but transmission via imported cuttings can occur. This fall, we have seen suspect viruses in planting stock. The viruses strawberry mottle virus (SMoV) and strawberry mild yellow edge virus (SMYEV) have been an infrequent problem in strawberry production in the past. Introduction typically occurs from infected plugs. Once infected plants are confirmed........
Armillaria Root Rot – A Threat to Stress...
Armillaria Root Rot – A Threat to Stressed Landscape Trees Tree stress can come from numerous factors, including weather, mechanical damage, insects, or poor growing conditions. These stresses make plants more susceptible to the plant disease Armillaria root rot. This fungal disease is also known as shoestring root rot, mushroom root rot, and oak root rot. Once symptoms are observed, damage is often too severe to save infected trees, as no effective management.....
Transplant Shock: Disease or Cultural Pr...
Transplant Shock: Disease or Cultural Problem? Autumn has arrived in Kentucky, and now is one of the best times to plant new trees. Cool-season planting allows trees to “focus” on root system development. Woody plants may take as long as 3 to 5 years to establish and recover from relocation, and cool-season planting may expedite establishment.
Stress and Decline in Woody Plants
Stress and Decline in Woody Plants Woody trees and shrubs may exhibit decline resulting from the stresses that can occur during their lives. Stress may be the result of improper plant or site selection, incorrect planting or maintenance practices, or poor soil conditions. Injury from equipment, weather, or chemicals can also lead to stress and decline. In addition, biological stresses such as diseases, insects, and wildlife could result in stress and decline of woody....
Diagnosis of “No Disease” Extension agents and growers may occasionally receive diagnostic reports from the University of Kentucky Plant Disease Diagnostic Laboratory that indicate, “no disease was found.” This may result from an insufficient sample and/or that the plant problem does not result from an infectious disease.
Soil-borne Pathogens Serve as the Bigges...
Soil-borne Pathogens Serve as the Biggest Threat to Mum Production in Kentucky Many Kentucky vegetable and greenhouse producers are beginning to include fall chrysanthemum production in their operations. Mums are usually planted in June and sold in September when fall color is in demand. In Kentucky, mum production can vary in size, and small growers can produce as few as 200 plants per season.
Bacterial Leaf Scorch Can Torch Landscap...
Bacterial Leaf Scorch Can Torch Landscape Trees Kentucky’s landscapes are populated by many trees that are susceptible to bacterial leaf scorch. This disease may not kill trees instantly, but over time, it can have devastating effects. Pruning and reducing stress can prolong the life of infected trees; however, there are currently no methods to prevent or cure bacterial leaf scorch.
Avoid Introduction of Boxwood Blight int...
Avoid Introduction of Boxwood Blight into Landscapes Boxwood blight has been detected in Kentucky again this year. The disease can be devastating to American boxwood cultivars, which are common in the Kentucky landscape. Complete defoliation can occur within a week and plants can die within a single growing season. Use of tolerant cultivars, cultural practices, and fungicides can reduce incidence and spread of boxwood blight.
Downy Mildew of Grape
Downy Mildew of Grape Downy mildew is an important disease of commercial and backyard grapes in Kentucky. Current warm, wet, humid weather conditions favor infection and disease development. When flowers, clusters, and shoots become infected by downy mildew, yield losses result. This disease may also predispose grapevines to winter injury. Fungicides are available; however, sanitation is a critical step in prevention and management.
Powdery Mildew of Hemp
Powdery Mildew of Hemp Powdery mildew can affect numerous plants, including fruit, vegetable, and agronomic crops, as well as woody and herbaceous ornamentals. Kentucky hemp is also susceptible to this disease. Plants infected early in the season can be seriously damaged, while those affected later in the season may not be significantly harmed. Powdery mildew may adversely affect flowering, plant vigor, and yields, although this disease rarely kills plants outright. As hemp is a new crop, no fu
New Resource: Strawberry Scout Website
New Resource: Strawberry Scout Website The publication “An IPM Scouting Guide for Common Problems of Strawberry in Kentucky” was first introduced in 2016 as an online/paper version. In order to improve access to this important scouting guide, a mobile website was developed. The Strawberry Scout Website is now available for grower, agent, and homeowner use.
Cane Blight of Brambles
Cane Blight of Brambles Cane blight occasionally impacts homegrown and commercial raspberries and blackberries in Kentucky. Recent rain events have resulted in a wet growing season, which favors the development of cane blight. The disease causes lesions to develop on both primocanes (current-year canes) and floricanes (second-year or fruiting canes) and can result in reduced yield and cane death. Fungicides are available; however, sanitation is a critical step in prevention and management.
Black Rot of Grapes
Black Rot of Grapes Black rot is a common disease of grapes in Kentucky. Due to the prevalence of this disease, it is also one of the most economically important diseases of grapes. Black rot can affect all young, developing, above ground plant tissues. However, fruit infections are the most destructive. Without adequate disease management, both home and commercial vineyards may suffer significant yield losses.
Apple Scab Picking on Kentucky Apple and...
Apple Scab Picking on Kentucky Apple and Crabapple Trees Apple scab is the most consistently serious disease of homegrown apple and flowering crabapple in Kentucky. The most noticeable losses on apple result from reduced fruit quality and from premature drop of infected fruit. Scab also causes a general weakening of the host when leaves are shed prematurely. Summer defoliation of flowering crabapple due to scab invariably results in fewer flowers the next spring. Resistant cultivars and fungici
Increased Threat of Brown Rot as a Result of Prolific Rainfall Abundant rainfall and warm temperatures have been present in Kentucky over the past few weeks. These weather conditions can lead to an increase in the presence of brown rot on stone fruits (peach, cherry, plum, nectarine), which results in rotten, inedible fruit. Early season management can reduce initial sources of the fungus as it emerges from dormancy. Management of early infections results in less disease incidence later in the
Dogwood Anthracnose Spotted
Dogwood Anthracnose Spotted Anthracnose of dogwood is a common problem in Kentucky. Symptoms on landscape and forest dogwoods often first appear during wet periods in late spring. If left unmanaged, the pathogen spreads, eventually resulting in plant death. Selection of resistant varieties and maintenance of tree health are critical for disease prevention.
Cedar-Apple Rust Cedar-apple rust is the most common and economically important rust disease of apple in Kentucky. Symptoms of this disease are beginning to appear across the state. The pathogen overwinters as galls on cedar and juniper. Removal of these pathogen sources on cedar can later reduce disease incidence on apple. Once apple trees become infected limited management options are available.
A Profile of Commercial Apple Production in Kentucky 2017 Apple production in Kentucky is small, from less than 1 acre to just over 40 acres, yet profitable. Cash value of Kentucky apple production is valued at $24.4 million to $40.6 million per year. Apple orchards are distributed throughout Kentucky, and play an important role in providing access to local foods.