College publications are given 2-part "pub numbers" that are used to identify them. The first part (the prefix) is a set of letters that indicates which series the document belongs to. A series is a grouping of documents that share similar content. The second part of the pub number is just a sequential number.
In descending order, by date published.
9/9/2021 (major revision)
Authors: Nicole Ward Gauthier, Kevin Lyons, Chris Smigell
Gummosis is a general, nonspecific condition of stone fruits (peach, nectarine, plum and cherry) in which gum is exuded and deposited on the bark of trees. Gum is produced in response to any type of wound, regardless of whether it is due to insects, mechanical injury or disease.
Departments: Horticulture, Monroe County, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 207 kb
Pages: 4
1/26/2021 (new)
Authors: Nicole Ward Gauthier
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.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 682 kb
Pages: 3
4/17/2020 (new)
Authors: Nicole Ward Gauthier, Erica Wood
Brown rot is the most devastating disease of peach in Kentucky. The disease affects both commercial and backyard orchards. Crop losses occur primarily as a result of fruit decay; however, blossom blight is also part of the disease cycle. All stone fruit (peach, nectarine, plum, and cherry) are susceptible to brown rot.
Departments: Hopkins County, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: mb
Pages: 3
3/9/2020 (major revision)
Authors: Nicole Ward Gauthier
Peach fruit diseases can cause significant losses in yield and quality in commercial and home orchards. Often these diseases go unnoticed until late in the season or at harvest. Although there are no curative treatments for infected fruit, many diseases can be prevented using cultural practices and (optional) fungicides. Accurate diagnosis, however, is critical to determine the best management practices and to prevent future losses.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 915 kb
Pages: 4
8/1/2019 (new)
Authors: Ric Bessin, Kimberly Leonberger, Matthew Springer, John Strang, Nicole Ward Gauthier, Shawn Wright
Integrated pest management (IPM) includes the combination of biological, cultural, physical, and chemical tools in efforts to manage diseases and pests while minimizing risks associated with pesticides. Cultural practices are an integral part of an IPM program and should be incorporated into all commercial systems whether large or small, conventional or organic. This publication provides recommended practices at approximate growth stages and/or production periods. However, these timelines are approximate and may require adjustment for particular conditions. Growers who encounter situations that may not align with suggestions here should contact their county Extension office for assistance. Extension offices can also provide updated pest management recommendations. This cultural guide serves as a supplement to published spray guides and scouting guides.
Departments: Entomology, Forestry and Natural Resources, Horticulture, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 1.39 mb
Pages: 7
8/1/2019 (new)
Authors: Ric Bessin, Kimberly Leonberger, Matthew Springer, John Strang, Nicole Ward Gauthier, Shawn Wright
egrated pest management (IPM) includes the combination of biological, cultural, physical, and chemical tools in efforts to manage diseases and pests while minimizing risks associated with pesticides. Cultural practices are an integral part of an IPM program and should be incorporated into all commercial systems whether large or small, conventional or organic. This publication provides recommended practices at approximate growth stages and/or production periods. However, these timelines are approximate and may require adjustment for particular conditions. Growers who encounter situations that may not align with suggestions here should contact their county Extension office for assistance. Extension offices can also provide updated pest management recommendations. This cultural guide serves as a supplement to published spray guides and scouting guides.
Departments: Entomology, Forestry and Natural Resources, Horticulture, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 986 kb
Pages: 7
8/1/2019 (new)
Authors: Kimberly Leonberger, Madison McCulloch, Nicole Ward Gauthier
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 apple orchards. Yield losses can range from 10% to 100%.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 1.49 mb
Pages: 6
8/1/2019 (minor revision)
Authors: Nicole Ward Gauthier
Diseases of apple fruits appearing at harvest can cause significant losses in yield and quality. To know what control measures to take next year to prevent similar losses, it is important to recognize what is being observed. In some cases, growers will need to cut the fruit open to identify the problem.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 306 kb
Pages: 2
7/1/2019 (minor revision)
Authors: Nicole Ward Gauthier
A spray schedule worksheet for commercial peach/stone fruit growers.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 458 kb
Pages: 1
7/1/2019 (reviewed)
Authors: Ric Bessin, Kimberly Leonberger, John Strang, Nicole Ward Gauthier, Shawn Wright
Backyard stone fruit (peach, nectarine, plum, and cherry) production requires a proactive approach to disease, insect, and weed management. Preventative practices are recommended to minimize inputs. This guide focuses on preventative cultural practices with options of low-input pesticide applications. Refer to the homeowner fruit spray guide (ID-21) for a more complete pesticide spray schedule.
Departments: Entomology, Horticulture, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 890 kb
Pages: 4
7/1/2019 (reviewed)
Authors: Ric Bessin, Kimberly Leonberger, John Strang, Nicole Ward Gauthier, Shawn Wright
Backyard apple production requires a proactive approach to disease, insect, and weed management. Preventative practices are recommended to minimize inputs. While intensive culture may result in the highest quality fruit, reduced inputs can result in acceptable fruit with minor crop losses or aesthetic maladies. This guide focuses on preventative cultural practices with options of low-input pesticide applications. Refer to the homeowner fruit spray guide (ID-21) for a more complete pesticide spray schedule.
Departments: Entomology, Horticulture, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 1.01 mb
Pages: 4
7/1/2019 (minor revision)
Authors: Ric Bessin, John Strang, Nicole Ward Gauthier
Peach, nectarine, apricot, plum, and cherry are all stone fruits. Production of these tree fruits requires pest and disease management programs for quality fruit. Home orchards are no different. Homeowners, however, are generally more tolerant of aesthetic maladies or minor crop losses than commercial orchardists. Thus, homeowners may choose to limit numbers of insecticide and fungicide sprays. Disease resistant cultivars are the preferred method for reducing spray inputs.
Departments: Entomology, Horticulture, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 672 kb
Pages: 2
7/1/2019 (minor revision)
Authors: Ric Bessin, John Strang, Nicole Ward Gauthier, Beth Wilson
Apple production requires pest and disease management programs for quality fruit. Home orchards are no different. Homeowners, however, are generally more tolerant of aesthetic maladies or minor crop losses than commercial orchardists. Thus, homeowners may choose to limit numbers of insecticide and fungicide sprays.
Departments: County Extension, Entomology, Horticulture, Plant Pathology, Pulaski County
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 626 kb
Pages: 4
7/1/2019 (minor revision)
Authors: Nicole Ward Gauthier
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, including ID-232, or by contacting county Extension agents.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 385 kb
Pages: 3
6/1/2019 (minor revision)
Authors: Nicole Ward Gauthier
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, including ID-232, or by contacting county Extension agents.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 401 kb
Pages: 3
4/1/2019 (minor revision)
Authors: Nicole Ward Gauthier
A sample spray guide and spray schedule worksheet.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 337 kb
Pages: 2
1/1/2019 (minor revision)
Authors: Kimberly Leonberger, Evan Tate, Nicole Ward Gauthier
Numerous plant diseases impact fruit crops throughout Kentucky. Factors such as plant growth stage, as well as rainfall, temperature, and other weather conditions, can be used to determine risk for plant disease. Prediction models are critical tools for growers, as they allow for protective management strategies to be deployed when disease risk is high. Use of these models can provide growers with cost savings, as unnecessary chemical applications are eliminated when risk of infection is low.
Departments: Hancock County, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 1.59 mb
Pages: 4
3/1/2016 (new)
Authors: John Hartman
Cherry leaf spot occurs on both sweet and sour cherry; however, it is considerably more serious on sour cherries. Premature defoliation from cherry leaf spot reduces flower bud set for the next year, weakens trees, and increases sensitivity to winter injury.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 500 kb
Pages: 1
2/1/2016 (new)
Authors: Paul Andrew Rideout, Nicole Ward Gauthier
Black rot and frogeye are common names of an apple disease that occurs in three phases: (1) leaf infections result in frogeye leaf spot, while (2) fruit rot and (3) branch infections are referred to as black rot. All three phases can cause significant damage in Kentucky home and commercial orchards.
Departments: County Extension, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 1.00 mb
Pages: 3
12/1/2015 (new)
Authors: Dennis Morgeson, Nicole Ward Gauthier
Black knot is a common, often serious, disease of plums and cherries in Kentucky. Ornamental Prunus species, as well as wild plums and cherries, may also be affected. Trees in both commercial and residential plantings are susceptible.
Departments: County Extension, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 784 kb
Pages: 2
12/1/2015 (new)
Authors: Dennis Morgeson, Nicole Ward Gauthier
Peach leaf curl occurs annually in commercial and residential orchards throughout Kentucky. The disease causes severe defoliation, weakens trees, and reduces fruit quality, fruit set, and yield. Peaches, apricots, and nectarines are susceptible to peach leaf curl. Plum pockets is a similar, but less common, disease that occurs on wild and cultivated plums.
Departments: County Extension, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 887 kb
Pages: 3
8/1/2015 (new)
Authors: Annette Meyer Heisdorffer, Nicole Ward Gauthier
Cedar-apple rust is the most common and economically important rust disease occurring on apple in Kentucky. Two other rusts, cedar-hawthorn rust and cedar-quince rust, are of lesser importance on apple, but can significantly impact ornamental plants. All three diseases occur on crabapple, hawthorn, mountain ash, pear, and serviceberry.
Departments: County Extension, Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 813 kb
Pages: 5
8/1/2012 (new)
Authors: Nicole Ward Gauthier
Apple scab is the most consistently serious disease of apple and flowering crabapple in Kentucky. This disease also occurs on hawthorn and mountain ash; a similar disease affects pear and pyracantha (firethorn). 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.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 486 kb
Pages: 3
8/1/2012 (minor revision)
Authors: Cheryl Kaiser, Nicole Ward Gauthier
Fire blight is a highly destructive disease of apple and pear that can occur in commercial orchards and home plantings. Many landscape trees and shrubs in the rose family are also susceptible to this disease. Fire blight can cause severe damage in a very short period of time. Because precise conditions are needed for infection, disease appearance is erratic from year to year.
Departments: Plant Pathology
Series: Tree Fruit Disease: Plant Pathology Factsheet (PPFS-FR-T series)
Size: 650 kb
Pages: 4
