University of Kentucky College of Agriculture

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Paul Vincelli

Genetically Engineered Crops: Emerging Opportunities
6/28/2017 (minor revision)

In certain biotech crops, their genetic material (DNA) has been purposefully manipulated in the laboratory. These genetically engineered crops are often called "GMOs," an acronym for "genetically modified organisms." These GMOs are the focus of this publication. | PPA-47
web only | 16 pages | 9,014 words | 57 downloads | PDF: 5,892 kb

Sampling for the Tall Fescue Endophyte in Pasture or Hay Stands
4/10/2017 (minor revision)

Most of the tall fescue growing in Kentucky is colonized by the tall fescue endophyte, a fungus which causes disorders in livestock that feed on the infected grass. The animal disease syndrome is called fescue toxicosis, which some researchers estimate may cost Kentucky producers over $200 million yearly. This problem can be greatly reduced by identifying the infected fields and replacing them with endophyte-free or novel endophyte tall fescue varieties or by managing them in a way to minimize the impact of the endophyte on herd productivity. One of the simplest ways to reduce toxicity symptoms in cattle is add red and white clover to existing tall fescue stands. | PPA-30
web only | 2 pages | 1,222 words | 22 downloads | PDF: 253 kb

Chemical Control of Turfgrass Diseases, 2017
4/4/2017 (major revision)

Turgrasses under intensive management are often subject to outbreaks of infectious diseases. Good turf management practices often greatly reduce the impact of disease by promoting healthy plants that are better able to resist infections. Even under good management, however, diseases sometimes cause excessive damage to highly managed turfgrasses. The proper use of fungicides in these instances, in conjunction with good cultural practices that promote quality turf, can be an important part of an overall disease-management program. | PPA-1
web only | 32 pages | 21,555 words | 110 downloads | PDF: 1,926 kb

Genetically Engineered Crops: A Review of Concerns and Benefits
10/1/2016 (new)

Genetically engineered crops are plants that have had their genetic material (DNA) purposefully manipulated in the laboratory to produce a particular beneficial outcome. These types of crops are often called genetically modified organisms, or GMOs. Commercial genetically engineered crops are designed to have limited and precise genetic changes that provide one or more benefits to humans or the environment. | PPFS-MISC-7
web only | 5 pages | 1,238 words | 2 downloads | PDF: 1,260 kb

Managing Spring Dead Spot of Bermudagrass
3/1/2016 (new)

Spring dead spot is the most destructive disease of bermudagrass in Kentucky. The most serious outbreaks occur under high maintenance conditions; e.g., high nitrogen fertility, low mowing height, and frequent traffic. Moderate to severe outbreaks can occur under low-maintenance conditions as well. | PPFS-OR-T-13
web only | 4 pages | 1,638 words | 3 downloads | PDF: 816 kb

Fundamental Principles of Plant Pathology for Agricultural Producers
3/9/2015 (major revision)

All crop plants produced in Kentucky have the potential to become diseased under certain conditions. Diseases of crops can affect yield and/or quality of the harvested commodity, which can impact profitability and increase the risks of farming. A plant is diseased when it is affected by some agent that interferes with its normal development. Some disorders are caused by noninfectious factors, such as temperature extremes or nutrient deficiencies. However, this publication focuses on diseases caused by infectious microorganisms. | PPA-41
web only | 7 pages | 3,473 words | 45 downloads | PDF: 3,800 kb

Managing Diseases of Alfalfa
12/1/2014 (new)

Alfalfa can be a vigorous and productive forage crop for Kentucky farmers. Like all farm crops, however, alfalfa is subject to infectious diseases that can limit forage production. Managing these diseases is an important part of economical alfalfa production. | PPFS-AG-F-9
web only | 4 pages | 1,658 words | 3 downloads | PDF: 756 kb

Brown Patch Disease in Kentucky Lawns
12/1/2014 (new)

Brown patch, also called Rhizoctonia blight, is a common infectious disease of turfgrass. All turfgrasses grown in Kentucky lawns can be affected by brown patch. However, this disease is usually destructive only in tall fescue and perennial ryegrass during warm, humid weather. While brown patch can temporarily harm a lawn's appearance, it usually does not cause permanent loss of turf except in plantings less than 1 year old. | PPFS-OR-T-12
web only | 4 pages | 1,767 words | 3 downloads | PDF: 745 kb

Disease Management in the Home Lawn
11/1/2014 (new)

This publication describes lawn management practices that can help control diseases of turfgrasses commonly used in home lawns--Kentucky bluegrass, tall fescue, and perennial ryegrass. You can control diseases of turfgrasses most effectively by using as many of the following lawn management practices as feasible. | PPFS-OR-T-11
web only | 4 pages | 1,670 words | 4 downloads | PDF: 1,018 kb

Patch Diseases in Kentucky Bluegrass Lawns
11/1/2014 (new)

"Patch diseases" can be very destructive when Kentucky bluegrass is grown under intensive management. Two patch diseases with similar symptoms can occur. Necrotic ring spot often appears in early summer. Summer patch, the more common disease in Kentucky landscapes, develops in middle to late summer. | PPFS-OR-T-6
web only | 4 pages | 1,892 words | 1 download | PDF: 793 kb

Kentucky Plant Disease Management Guide for Forage Legumes
10/1/2014 (new)

Disease management in forage legumes relies heavily on using disease-resistant varieties and employing sound agronomic practices. It is important to integrate both of these strategies into a comprehensive disease management program. Failure to consider one or the other will compromise the success of your efforts. The appropriate use of pesticides sometimes plays a significant role in managing certain diseases, but it is secondary to sound cultural practices and proper variety selection. | PPFS-AG-F-8
web only | 7 pages | 2,707 words | 2 downloads | PDF: 907 kb

Considering the Environment in the Maintenance of Your Kentucky Lawn: A Season by Season Approach
7/30/2014 (new)

Most people do not realize the environmental benefits of lawns. Lawns are known to cool the air, reduce soil erosion, remove dust and pollutants (including CO2) from the air, reduce run-off of water and pollutants, create oxygen for humans, and improve soils over time by supplying organic matter. Lawns are also important aesthetically and have been shown to improve human well-being. However, to be 100 percent environmentally friendly, we could never fertilize or water our lawns and only mow with a self-propelled reel mower. Or, we could get rid of our lawn altogether. Neither of these options is particularly appealing for most people. We can, however, have a high quality lawn and reduce our impact on the environment by doing some very simple things at the right times of the year. The following guide will walk you through a series of steps that are important for keeping your lawn looking thick and healthy and at the same time reducing pests and the need for chemicals and other inputs. | ID-222
web only | 8 pages | 4,099 words | 47 downloads | PDF: 9,000 kb

Some Principles of Fungicide Resistance
1/1/2014 (new)

Fungicides are important tools in modern crop production. Unfortunately, one of the risks of using these products is that fungi sometimes develop resistance to them. Resistance development is a concern because the products may become less effective--or even useless--for controlling resistant pathogens and pests. This is a concern for all pesticides, including fungicides, insecticides, and herbicides. This fact sheet is intended to help pesticide applicators better understand this process. | PPFS-MISC-2
web only | 10 pages | 5,690 words | 3 downloads | PDF: 1,325 kb

Rating Scale for Brown Stripe of Orchardgrass
7/1/2013 (new)

As of right now, there is little published on how to assess foliar disease severity in forage grasses in order to determine the percentage which may be diseased. This publication provides a tool for visually determining the percentage of diseased foliar tissue in orchardgrass. It is based on the observation of individual leaves; however, it is hoped that eventually a rating system will be devised that provides disease percentages for entire plots. | PPFS-AG-F-7
web only | 3 pages | 511 words | - | PDF: 566 kb

Woody Plant Disease Control Guide for Kentucky
3/22/2012 (major revision)

Management of woody plant diseases usually combines preventative and curative practices, including a focus on plant health, sanitation, cultivar selection, and pesticides. | ID-88
web only | 16 pages | 7,345 words | 36 downloads | PDF: 3,700 kb

Assessing Foliar Diseases of Corn, Soybeans, and Wheat: Principles and Practices
11/1/2011 (new)

This publication provides basic information on how to conduct disease assessments in on-farm trials. The focus is on foliar diseases, since root diseases are much more difficult to assess properly. The publication begins with fundamentals of proper design of field trials. | PPFS-MISC-6
web only | 5 pages | 1,693 words | 1 download | PDF: 719 kb

Foliar Fungicide Use in Corn and Soybeans
10/1/2011 (new)

Interest in the use of foliar fungicides for corn and soybean has expanded dramatically in the U.S. over the past few years, resulting in a major change in how these crops are being produced on many farms. Until recently, foliar fungicides for soybeans and corn were reserved for seed production fields to protect seed quality in very specific circumstances or for specialty crops. Applications for the purpose of protecting crop yield were rarely economical. However, the current trend in Kentucky, as well as many other corn/soybean producing states, is towards an increased use of foliar fungicides on these crops as a means of maximizing yields. | PPFS-GEN-12
web only | 9 pages | 3,829 words | 2 downloads | PDF: 1,093 kb

Climate Change: A Brief Summary for Kentucky Extension Agents
9/20/2011 (new)

Nearly all climate science experts agree that global warming is occurring and that it is caused primarily by human activity. Regardless of what you may read on blogs or in the media, there is no meaningful scientific controversy on these points. The future impacts of global warming are difficult to predict, but the changes caused by greenhouse gases are expected to increasingly affect Kentucky agriculture. | ID-191
2,000 printed copies | 4 pages | 1,975 words | 53 downloads | PDF: 250 kb

2010 Nursery and Landscape Research Report
1/28/2011 (new)

The UK Nursery and Landscape Program coordinates the efforts of faculty, staff, and students in several departments within the College of Agriculture tor the benefit of the Kentucky nursery and landscape industry. | PR-621
web only | 29 pages | 15,271 words | 18 downloads | PDF: 629 kb

Real-time PCR Detection of Xylella fastidiosa is Independent of Sample Storage Time and Temperature
11/1/2010 (new)

The xylem-limited bacterium Xylella fastidiosa, first associated with Pierce's disease of grapevines and alfalfa dwarf disease in 1973 (4) continues to be an economically important pathogen of several commercial crops. It also causes bacterial leaf scorch in urban shade trees such as sycamore, oaks, maples, mulberry, and elm (5). The usual course of action, in an effort to control the spread of this pathogen by insect vectors (9), is to prune out infected branches and vines or to rogue infected plants. Therefore, timely testing of suspect hosts is important. | PPFS-MISC-4
web only | 7 pages | 3,014 words | 1 download | PDF: 236 kb

Turfgrass Anthracnose
8/1/2010 (minor revision)

Anthracnose is primarily a disease of high maintenance turfgrass, such as annual bluegrass (Poa annua) and creeping bentgrass (Agrostis stolonifera) at golf courses. In Kentucky it can be a disfiguring disease of creeping bentgrass under putting green management conditions during summertime (June to September). The disease may make its appearance on intensely managed annual bluegrass somewhat earlier (April to September). The anthracnose pathogen can incite a foliar blight phase or the more destructive basal rot phase. | PPFS-OR-T-4
web only | 4 pages | 1,262 words | 1 download | PDF: 527 kb

Calendar for Diseases of Cool-season Grasses in Kentucky
6/1/2010 (new)

A graphic representation showing the times of year that diseases of cool-season grasses are likely. | PPFS-OR-T-7
web only | 2 pages | 125 words | 1 download | PDF: 161 kb

Corn and Soybean Production Calendar
12/16/2009 (reprinted)

The Corn and Soybean Production Calendar was developed to help producers prioritize and schedule work events in a timely fashion on the farm. Weather events and equipment breakdowns rarely follow an organized schedule. However, if other practices within the farming operation are prioritized, perhaps a producer can better address the emergencies that will occur. | ID-159
2,000 printed copies | 12 pages | - | 23 downloads | PDF: 650 kb

Reducing the Risk of Resistance to Fungicides Used to Control Diseases of Turfgrasses
8/1/2009 (new)

Fungicides can be an important tactic in an overall integrated program for turf disease control. In order to insure that products available today remain available in the future, golf course superintendents should be aware of the need to use fungicides in ways that minimize the risk of fungicide resistance. | PPFS-OR-T-2
web only | 3 pages | 830 words | 1 download | PDF: 183 kb

Weather Favorable for Cottony Blight in Turfgrasses
8/1/2009 (minor revision)

Hot, humid weather with occasional showers is favorable for cottony blight, caused by various Pythium species. This disease, also known as Pythium blight, can be very destructive in swards of creeping bentgrass and perennial ryegrass in a high-maintenance setting, such as golf courses, croquet courts, etc. Cottony blight can occasionally be found on other cool-season turfgrasses, though very infrequently. | PPFS-OR-T-1
web only | 2 pages | 622 words | 1 download | PDF: 267 kb

Crown Rots of Alfalfa
5/1/2009 (minor revision)

Crown rots are chronic disease problems of alfalfa throughout the world. Crown rots cause loss of stand and forage yield in several ways. If the crowns are rotted severely enough, infected plants will die simply by being choked off. Carbohydrates for winter survival are stored in the crown and upper taproot. By rotting this area, crown rots also make alfalfa plants more sensitive to winter kill. Some crown rot fungi produce toxins, thus weakening or even killing the plant. | PPFS-AG-F-5
web only | 2 pages | 565 words | 1 download | PDF: 239 kb

Destructive Diseases Common on Turfgrasses in Kentucky
5/1/2009 (minor revision)

A list of diseases that are common in Kentucky on the host grasses indicated. This list includes only common diseases, and is not meant to provide a comprehensive list of all diseases diagnosed on turfgrasses grown in Kentucky. | PPFS-OR-T-9
web only | 2 pages | 250 words | 3 downloads | PDF: 241 kb

Common Alfalfa Seedling Diseases and Disorders
3/1/2009 (minor revision)

Alfalfa seedlings are subject to a number of biotic and abiotic problems which can affect establishment. Several of the more common seedling diseases and disorders are described below. This information is being provided as a diagnostic aid; publications which provide specific management and production information can be found in the resource list. | PPFS-AG-F-3
web only | 2 pages | 639 words | 2 downloads | PDF: 115 kb

"Emergency" Inoculation for Poorly Inoculated Legumes
2/1/2009 (minor revision)

Frequently, stunted and yellowed legumes are thought by growers to be diseased. Close examination often reveals that such "diseased" plants are actually just poorly nodulated. | PPFS-AG-F-4
web only | 3 pages | 912 words | 1 download | PDF: 187 kb

Risk Factors for Sclerotinia Crown and Stem Rot in Fall-Seeded Alfalfa
12/1/2008 (minor revision)

Alfalfa seeded during late summer or fall is susceptible to the destructive disease Sclerotinia crown and stem rot. Fall-seeded stands are particularly vulnerable to this disease because the young seedlings have not had sufficient time to develop adequate resistance before infectious spores of the pathogen are produced in late October. In contrast, spring-seeded stands are able to develop larger, more resistant crowns prior to this infectious period. Thus, spring plantings are better able to withstand an attack, should these air-borne spores be present in the field. | PPFS-AG-F-2
web only | 3 pages | 977 words | 1 download | PDF: 280 kb

2008 Fruit and Vegetable Research Report
12/1/2008 (new)

| PR-572
1,100 printed copies | 72 pages | - | 14 downloads | PDF: 800 kb

Alfalfa Diseases Caused by Rhizoctonia Fungi
11/1/2008 (minor revision)

Rhizoctonia fungi, particularly Rhizoctonia solani, are found in most agricultural soils in Kentucky. These fungi are natural soil inhabitants that colonize and live on dead organic matter. Under the right environmental conditions, the Rhizoctonia organisms are often able to attack living plants, including alfalfa. When warm, wet conditions prevail, Rhizoctonia fungi can cause just about every conceivable type of alfalfa disease. | PPFS-AG-F-6
web only | 3 pages | 701 words | 1 download | PDF: 294 kb

Summertime Foliar Diseases of Alfalfa
11/1/2008 (minor revision)

Warm, humid weather can favor development of foliar diseases of alfalfa during summer. | PPFS-AG-F-1
web only | 2 pages | 409 words | 1 download | PDF: 194 kb

Seed and Seedling Diseases of Corn
10/1/2008 (minor revision)

Corn seeds and seedlings are susceptible to infection by a number of soilborne fungi. When planted into cool, wet soils, seeds may decay before or after germination. Affected plants that survive past the seedling stage may go on to produce an ear if nodal roots develop normally, although stunting and reduced ear size can occur as a result of seedling diseases. Severely affected plants may die during stressful weather as the result of an inadequate root system. | PPFS-AG-C-2
web only | 2 pages | 430 words | 1 download | PDF: 160 kb

Diseases of Concern in Continuous Corn
10/1/2008 (minor revision)

Although most corn in Kentucky is planted following a rotation to other crops, individual producers are often interested in planting corn following corn. In these situations, one of the main concerns voiced by producers is increased pressure from diseases, and rightfully so. Crop rotation is one of the most fundamental disease control practices available. Rotating to other crops deprives pathogens (disease-causing microorganisms) of a food source and exposes them to "starvation." Furthermore, as infested crop residues decompose, pathogens are exposed to antagonism by native soil microbes. These mechanisms have the effect of naturally reducing the populations of many pathogens in the soil. | PPFS-AG-C-1
web only | 4 pages | 1,434 words | 2 downloads | PDF: 233 kb

Replanting Options for Corn
7/27/2007 (new)

Evaluating damaged corn stands and determining when to replant is often a difficult task. Survival, health, and expected yield of the current stand must be weighed against replanting costs, additional management, and expected yield of a replanted crop. The options are rarely clear-cut because damaged corn is rarely uniform throughout the field. The following information will help when making evaluations and management decisions. | AGR-195
1,000 printed copies | 6 pages | - | 17 downloads | PDF: 194 kb

2005 Fruit and Vegetable Research Report
12/30/2005 (new)

| PR-521
1,100 printed copies | 98 pages | - | 4 downloads | PDF: 1,555 kb

Controlling Phytophthora Root Rot in Greenhouse Ornamentals
5/1/2005 (minor revision)

Phytophthora fungi can attack a number of potted herbaceous ornamentals produced in greenhouses. The potted flowering plants reported as hosts include: begonia, bougainvillea, ornamental pepper, vinca, poinsettia, Persian violet, fuchsia, common gardenia, African daisy, kalanchoe, Lantana, African violet, holiday cactus, gloxinia, and Jerusalem cherry. | PPFS-GH-5
web only | 2 pages | 613 words | 1 download | PDF: 615 kb

Low-Maintenance Lawn Care, Stressing Pest Avoidance and Organic Inputs
3/15/2005 (reprinted)

This publication is written for those who wish to maintain their lawn with minimal inputs. Low-maintenance lawn care offers certain benefits, such as minimal pesticide use, reduced fertilizer input, less need for irrigation, and reduced mowing frequency. However, when choosing a low-maintenance approach, recognize that the lawn will not offer the same dark green, uniform sward of turf that is seen under a high-maintenance lawn-care program. | ID-154
2,500 printed copies | 6 pages | - | 19 downloads | PDF: 176 kb

2004 Alfalfa Report
1/30/2005 (new)

| PR-506
2,500 printed copies | 8 pages | - | 3 downloads | PDF: 521 kb

2003 Alfalfa Report
12/24/2003 (new)

| PR-489
2,500 printed copies | 8 pages | - | 1 download | PDF: 107 kb

2002 Alfalfa Report
1/5/2003 (new)

| PR-471
3,000 printed copies | 12 pages | - | 1 download | PDF: 185 kb

2001 Alfalfa Report
5/13/2002 (reprinted)

| PR-453
500 printed copies | 16 pages | - | 1 download | PDF: 209 kb

New Recommendations for Perennial Ryegrass Seedings for Kentucky Horse Farms
1/1/2002 (new)

| ID-142
500 printed copies | 2 pages | - | 8 downloads | PDF: 41 kb

A Comprehensive Guide to Corn Management in Kentucky
9/30/2001 (new)

The corn grown in Kentucky is used mainly for livestock feed and as a cash crop. As a cash crop sold from the farm, corn ranks third behind tobacco and soybeans but is the number one row crop in terms of acreage. Because the cost of producing an acre of corn is high and the value per bushel has declined in recent years, producers must manage and market their corn crop more carefully for adequate profits. The goal of this publication is to serve as a guide for corn production strategies that focus on efficient use of resources and provide the principles and practices for obtaining maximum, profitable corn yields. | ID-139
7,500 printed copies | 64 pages | 37,214 words | 52 downloads | PDF: 639 kb

2000 Alfalfa Report
1/15/2001 (new)

| PR-440
3,000 printed copies | 16 pages | - | 1 download | PDF: 398 kb

Agronomy Research Report 2000
7/10/2000 (new)

| PR-432
2,500 printed copies | 55 pages | - | 3 downloads | PDF: 550 kb

Brown Patch Disease
5/30/2000 (reprinted)

| ID-112
1,000 printed copies | - | - | 6 downloads | HTML: 10 kb

An Alfalfa Disease Calendar
5/1/2000 (new)

| PPA-44
1,500 printed copies | 4 pages | - | 6 downloads | PDF: 168 kb

1999 Alfalfa Report
12/15/1999 (new)

| PR-425
4,000 printed copies | 14 pages | - | - | PDF: 244 kb

1998 Alfalfa Report
1/15/1999 (new)

| PR-411
4,000 printed copies | 12 pages | - | - | PDF: 188 kb

1997 Alfalfa Report
2/1/1998 (new)

| PR-399
4,000 printed copies | 12 pages | - | 2 downloads | PDF: 153 kb