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Emily Pfeufer


PPFS-VG-7

Fruit Diseases of Cucurbits

1/26/2021 (major revision)
Authors: Emily Pfeufer

Vegetables in the cucurbit family include cucumber, muskmelon (cantaloupe), summer squash, winter squash, and pumpkin. The following diseases primarily affect the fruit of these crops and can result in losses in commercial fields and home gardens.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 315 kb
Pages: 5



PR-779

2020 Fruit and Vegetable Research Report

12/18/2020 (new)
Authors: Doug Archbold, Win Dunwell, Bob Perry, Emily Pfeufer, Rachel Rudolph, John Snyder, John Strang

Fruit and vegetable production continues to show sustained growth in Kentucky. As the industry grows around a diverse collection of marketing tactics (wholesale, farmer markets, CSAs, and direct to restaurants) as well as various production systems, there continues to be a need for applied practical information to support the industry. Evaluation of varieties is a continuing necessity and allows us to provide the most up to date information in communications with vegetable growers. The vegetable variety trial results are the basis for updating the recommendations in our Vegetable Production Guide for Commercial Growers (ID-36).

Departments: Dietetics and Human Nutrition, Horticulture, Plant Pathology
Series: Progress Report (PR series)
Size: 6.06 mb
Pages: 40



PPFS-VG-25

Early Blight and Septoria Leaf Spot of Tomato - Disease Management for Commercial Grower

12/15/2020 (new)
Authors: Erica Fealko, Emily Pfeufer

Early blight and Septoria leaf spot are the most common fungal diseases of tomato in Kentucky. Often occurring together, these diseases can significantly reduce yields during seasons with humid, wet weather.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 1.37 mb
Pages: 5



ID-160

Burley and Dark Tobacco Production Guide, 2021-2022

12/9/2020 (major revision)
Authors: Andy Bailey, Ric Bessin, Lowell Bush, Ann Fisher, J.D. Green, Bob Miller, Bob Pearce, Emily Pfeufer, Edwin Ritchey, Wayne Sanderson, Will Snell

Under ideal conditions, growing a good crop of tobacco is relatively easy, but when conditions are challenging it takes good management skills and attention to detail to make tobacco a profitable crop. This publication is designed to provide the good manager with the latest information for the production of high yielding, good quality tobacco.

Departments: Agricultural Economics, Biosystems and Agricultural Engineering, Entomology, Plant and Soil Sciences, Plant Pathology
Series: Interdepartmental (ID series)
Size: 41,507.63 mb
Pages: 88



PPFS-VG-6

Bacterial Canker of Tomato

11/14/2020 (major revision)
Authors: Emily Pfeufer

Bacterial canker is a potentially serious disease of tomato that can occur in commercial plantings and home gardens. This infectious disease is capable of spreading rapidly, resulting in devastating losses. It is a particularly difficult disease to manage because not only is there no cure, but the pathogen can be hard to eradicate once it has been introduced into a greenhouse, garden, or field.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 392 kb
Pages: 4



PPFS-AG-T-7

Target Spot and Frogeye Leaf Spot of Field-grown Tobacco

3/31/2020 (new)
Authors: Emily Pfeufer

Target spot and frogeye leaf spot are the major fungal leaf spot diseases of tobacco grown in Kentucky. Burley and dark tobacco are susceptible to these leaf spot diseases; however, dark tobacco tends to be affected to a lesser extent than burley. Yield losses to target spot can exceed 50% in some years; frogeye reduces yields up to 30%, but can affect quality so severely that cured leaf may be declined. Integrated approaches, including good greenhouse production practices, crop rotation, and timely fungicide applications, will optimize management of these diseases.

Departments: Plant Pathology
Series: Tobacco Disease: Plant Pathology Factsheet (PPFS-AG-T series)
Size: 1.21 mb
Pages: 4



PPFS-AG-T-6

Black Shank of Tobacco

3/9/2020 (new)
Authors: Emily Pfeufer

Black shank is one of the most important diseases of burley and dark tobacco in Kentucky. It tends to cause the greatest losses in fields with a history of black shank, during seasons with a wet to moderate early season followed by a dry August. Management is dependent on the successful combination of crop rotation, resistant varieties, and soil-directed fungicide applications.

Departments: Plant Pathology
Series: Tobacco Disease: Plant Pathology Factsheet (PPFS-AG-T series)
Size: 2.00 mb
Pages: 3



PPFS-AG-T-5

Maintaining the Efficacy of Foliar Fungicides for Tobacco Disease Management

7/1/2019 (minor revision)
Authors: Bob Pearce, Emily Pfeufer

Management of resistance to fungicides is based on alternating the use of particular modes of action, or FRAC groups, which essentially presents multiple different challenges to the fungal population. Overall, fungi that are naturally resistant to a mode of action are very rare in the environment. Challenging a population with multiple different modes of action will reduce the chance of developing widespread resistance, which will prolong the efficacy of these chemicals.

Departments: Plant and Soil Sciences, Plant Pathology
Series: Tobacco Disease: Plant Pathology Factsheet (PPFS-AG-T series)
Size: 473 kb
Pages: 4



PPFS-VG-1

Black Rot of Crucifers

7/1/2019 (minor revision)
Authors: David Davis, Emily Pfeufer

Black rot, caused by the bacterial pathogen Xanthomonas campestris pv. campestris (Xcc), can be a very destructive disease of cabbage, cauliflower, and broccoli. Other susceptible crucifers include: collards, kale, Brussels sprouts, Chinese cabbage, kohlrabi, turnip, mustard, radish, and rutabaga.

Departments: Clark County, Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 227 kb
Pages: 4



PPFS-VG-24

Biological Products for Tomato Disease Management

6/1/2019 (new)
Authors: Erica Fealko, Emily Pfeufer

Disease management products with biologically-based active ingredients are often labeled for numerous diseases, but can vary markedly in their efficacy. This Extension publication summarizes factors to consider when choosing biological controls and data available pertaining to tomato disease management efficacy.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 268 kb
Pages: 2



PPFS-VG-19

Sustainable Disease Management of Cucurbit Crops in the Home Garden

4/1/2019 (minor revision)
Authors: Kimberly Leonberger, Emily Pfeufer

Cucurbit vining crops include cucumbers, watermelons, cantaloupe, pumpkins, zucchini, and summer and winter squashes, and can be highly productive plants in small gardens. During wet summers, downy mildew and fungal leaf spot diseases tend to occur, while in drier summers, powdery mildew is the most common disease. Gardens with cucumber beetle pressure are much more likely to have plants affected by bacterial wilt, since striped and spotted cucumber beetles can carry the bacterial wilt pathogen.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 995 kb
Pages: 2



PPFS-VG-20

Sustainable Disease Management of Leafy Green Crops in the Home Garden

4/1/2019 (minor revision)
Authors: Kimberly Leonberger, Emily Pfeufer

Leafy greens are great garden plants as a result of their short seasons, ease of growing, and ability to be succession planted. In wet summers, bacterial diseases, fungal leaf spots, and downy mildew are common problems, while powdery mildew is more common during dry summers. Bacterial diseases are also benefited by hot weather with occasional strong storms, which injure plants and spread pathogens in the garden. Lettuce drop, caused by the Sclerotinia fungus, can become a multi-year problem and may spread to different families of plants.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 896 kb
Pages: 2



PPFS-VG-21

Sustainable Disease Management of Solanaceous Crops in the Home Garden

4/1/2019 (minor revision)
Authors: Kimberly Leonberger, Emily Pfeufer

Solanaceous crops, including tomatoes, peppers, eggplants, and potatoes, may be the most popular garden plants, but many diseases commonly affect them. Early blight and Septoria leaf spot occur each year under even the best disease management, and bacterial spot may be spread easily under rainy conditions. A combination of approaches, such as using resistant varieties, record-keeping, cultural, and chemical management, is the best practice for minimizing vegetable garden diseases.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 874 kb
Pages: 2



PPFS-VG-22

Sustainable Disease Management of Legume Vegetable Crops in the Home Garden

4/1/2019 (minor revision)
Authors: Kimberly Leonberger, Emily Pfeufer

Beans and peas, both legume crops, are excellent plants to integrate into gardens for multiple reasons. These plants are affected by few of the diseases that affect other popular garden plants. Beans and peas increase nitrogen fertility where they are planted, enriching the soil for the plants that are to follow them in a rotation. These plants can be extremely productive, and are a great source of dietary fiber and, in some cases, vegetable protein.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 460 kb
Pages: 2



PPFS-VG-23

Sustainable Disease Management of Cole Crops in the Home Garden

4/1/2019 (minor revision)
Authors: Kimberly Leonberger, Emily Pfeufer

Cabbage, broccoli, cauliflower, kohlrabi, and brussel sprouts, all cole crops, are excellent plants to integrate into gardens. During wet seasons, bacterial diseases, fungal leaf spots, and downy mildew are common problems, while powdery mildew is more common during dry seasons. Bacterial diseases are also benefited by hot weather with occasional strong storms, which injure plants and spread pathogens in the garden.

Departments: Plant Pathology
Series: Vegetable Disease: Plant Pathology Factsheet (PPFS-VG series)
Size: 788 kb
Pages: 2



PR-757

2018 Fruit and Vegetable Research Report

12/13/2018 (new)
Authors: Doug Archbold, Ric Bessin, Krista Jacobsen, Emily Pfeufer, Rachel Rudolph, John Snyder, John Strang, Nicole Ward Gauthier, Shawn Wright

Fruit and vegetable production continues to show sustained growth in Kentucky. As the industry grows around a diverse collec-tion of marketing tactics (wholesale, farmers markets, CSAs, and direct to restaurants) as well as various production systems, there continues to be a need for applied practical information to support the industry.

Departments: Entomology, Horticulture, Plant Pathology
Series: Progress Report (PR series)
Size: 6.84 mb
Pages: 44



ID-235

An IPM Scouting Guide for Common Problems of High Tunnel and Greenhouse Vegetable Crops in Kentucky

10/17/2018 (major revision)
Authors: Ric Bessin, Cheryl Kaiser, John Obrycki, Emily Pfeufer, Rachel Rudolph, Shubin Saha, Shawn Wright

Scouting and monitoring diseases, insects, weeds, and abiotic disorders in order to identify potential problems before they result in serious losses is essential to the IPM approach. The key to effective monitoring is accurate identification. The pictures included in this guide represent the more common abiotic and biotic problems that occur on vegetable crops grown in high tunnel and greenhouse structures in Kentucky. This manual is not all-inclusive, and growers may encounter problems not included here. Please contact a local Cooperative Extension Service office for assistance.

Departments: Entomology, Horticulture, Plant Pathology
Series: Interdepartmental (ID series)
Size: 1.94 mb
Pages: 28



PPFS-GEN-16

Southern Blight

8/1/2018 (new)
Authors: Carl Bradley, Emily Pfeufer, Nicole Ward Gauthier

Southern blight affects hundreds of different plants, including vegetables, field crops, ornamentals, and fruit. This disease is also known as southern stem blight, basal stem rot, Sclerotium blight, crown rot, and white mold (not to be confused with Sclerotinia white mold). Depending on host plant, production system, and environmental conditions, the severity of this disease can vary from a minor problem on isolated plants to extensive damage causing significant crop losses.

Departments: Plant Pathology
Series: General Plant Disease: Plant Pathology Factsheet (PPFS-GEN series)
Size: mb
Pages: 5



PPFS-AG-T-8

Fungicide Guide for Burley and Dark Tobacco, 2018

4/1/2018 (minor revision)
Authors: Will Barlow, Bob Pearce, Emily Pfeufer

The number of fungicides that are registered for use on tobacco in Kentucky is relatively small in comparison to the large array of products available to producers of other crops. Although growers have a limited number of fungicides from which to choose, those that are available are effective against most of the major diseases of roots, stems, and foliage.

Departments: Plant and Soil Sciences, Plant Pathology
Series: Tobacco Disease: Plant Pathology Factsheet (PPFS-AG-T series)
Size: 295.34 mb
Pages: 7



PPFS-AG-T-2

Managing Rhizoctonia Damping-off and Target Spot in the Float System

3/1/2018 (major revision)
Authors: Emily Pfeufer

Damping-off and target spot occur each year in tobacco transplant crops in Kentucky. These diseases can cause significant levels of damage to tobacco seedlings. Once considered minor problems in float beds, both have increased steadily in importance in recent years. Sound management practices and early recognition of these diseases are keys to preventing serious losses during the transplant production cycle.

Departments: Plant Pathology
Series: Tobacco Disease: Plant Pathology Factsheet (PPFS-AG-T series)
Size: 727 kb
Pages: 4



PPFS-AG-T-3

Collar Rot in the Tobacco Float System

3/1/2018 (major revision)
Authors: Emily Pfeufer

Collar rot can be found in tobacco float beds each year in Kentucky, causing a great deal of concern when it makes its appearance. Severe losses to this disease tend to be rare but can occur if care is not taken to minimize risk of disease development and reduce spread after it appears.

Departments: Plant Pathology
Series: Tobacco Disease: Plant Pathology Factsheet (PPFS-AG-T series)
Size: 666 kb
Pages: 3



PR-739

2017 Fruit and Vegetable Research Report

12/5/2017 (new)
Authors: Doug Archbold, Ty Cato, Steve Diver, Bob Geneve, June Johnston, Dave Lowry, Emily Pfeufer, Chris Smigell, John Snyder, John Strang, Ginny Travis, Joseph Tucker, Dwight Wolfe

Fruit and vegetable production continues to show sustained growth in Kentucky. As the industry grows around a diverse collec-tion of marketing tactics (wholesale, farmers markets, CSAs, and direct to restaurants) as well as various production systems, there continues to be a need for applied practical information to support the industry. The 2017 Fruit and Vegetable Crops re-search report includes results for 16 projects.

Departments: Horticulture, Plant Pathology
Series: Progress Report (PR series)
Size: 7.21 mb
Pages: 46



PPFS-AG-C-4

Stewart's Wilt of Corn

1/1/2017 (new)
Authors: Carl Bradley, Kelsey Mehl, Emily Pfeufer

Historically, Stewart's wilt of corn has resulted in losses for corn producers. Although this disease still occurs occasionally, it has become less prevalent in recent years in Kentucky and surrounding states. Stewart's wilt has been known by other names, such as bacterial leaf blight, Stewart's leaf blight, and maize bacteriosis.

Departments: Plant Pathology
Series: Corn Disease: Plant Pathology Factsheet (PPFS-AG-C series)
Size: 1.45 mb
Pages: 3



PPFS-GH-1

Managing Greenhouse and High Tunnel Environments to Reduce Plant Diseases

3/1/2016 (new)
Authors: Philip Konopka, Emily Pfeufer, Nicole Ward Gauthier

Greenhouse and high tunnel environments, which tend to be warm and humid, often create ideal situations for disease development. Environments favoring infection and spread of many disease pathogens include one or more of the following: high relative humidity (90% or above), free moisture (e.g., leaf wetness, wet soil), and/or warm temperature. Because diseases can cause extensive damage, their management is essential to production of high quality, marketable products. While challenging, these environments can be managed to simultaneously encourage plant growth and discourage pathogen spread.

Departments: County Extension, Plant Pathology
Series: Greenhouse Plant Disease: Plant Pathology Factsheet (PPFS-GH series)
Size: 1.49 mb
Pages: 6



PR-706

2015 Fruit and Vegetable Research Report

12/21/2015 (new)
Authors: Doug Archbold, Emily Pfeufer, Shubin Saha, John Snyder, John Strang, Nicole Ward Gauthier, Shawn Wright

The 2015 Fruit and Vegetable Crops research report includes results for more than 19 field research plots and demonstration trials. This year fruit and vegetable research and demonstration trials were conducted in seven counties in Kentucky: Jefferson, Spencer, Trimble, Shelby, Caldwell, Franklin, and Fayette.

Departments: Horticulture, Plant Pathology
Series: Progress Report (PR series)
Size: 1.54 mb
Pages: 44