College of Agricultural and Environmental Sciences

In addition to building and maintaining roads, the Georgia Department of Transportation (DOT) mows grass and kills weeds that obstruct drivers’ views. A University of Georgia scientist has created an app to help DOT agronomists kill weeds quicker, using less chemicals.

Patrick McCullough, a weed scientist with the UGA College of Agricultural and Environmental Sciences, decided to create the Georgia Roadside Management app after Georgia DOT officials approached him for help.

“The biggest problem they have is fighting invasive weed species, like broomsedge, vaseygrass and Johnsongrass. They are major species, and they are spreading, increasing maintenance costs and, more importantly, reducing safety for motorists,” said McCullough, a UGA researcher based on the campus in Griffin, Georgia.

Ray Dorsey, Georgia DOT agronomist manager, says tall weeds, like Johnsongrass, and invasive weeds, like kudzu, create “sight and distance problems,” especially at driveways and intersections.

“When we do road building, the contractors are required to replace the grass. Our permanent grasses of choice are bahiagrass and bermudagrass because they can help choke out weeds,” he said.

Georgia House Resolution 744 created a committee to study the use of unmanned aerial vehicles, or drones, in the state. Created as a result of public concern, the committee will look at the uses of these remote-controlled, airplane-like devices, equipped with cameras and used by law enforcement agencies and other government authorities, to determine whether they invade privacy.

University of Georgia scientist Clint Waltz in Griffin, Georgia, has been using an aerial drone to reduce the amount of time he and his technician spend documenting data in fields. They also use the drone to gather supplemental data through bird’s-eye-view photographs of research plots.

Waltz is uncovering how his research benefits from the use of his drone, or what looks like a miniature helicopter with a camera mounted underneath it.

“Photo documentation is essential to our research, and the drone can take aerial photos of the effects of different fertilizer and pesticide treatments on various grasses,” said Waltz, UGA Extension’s turfgrass specialist. “It can go up 50 or 60 feet and take a photo, which helps us measure treatment effects.”

The drone Waltz uses on the UGA College of Agricultural and Environmental Sciences campus in Griffin is lightweight, weighing under 5 pounds.

Summertime is synonymous with cooking outdoors, taking a dip in the pool and cranking up the lawn mower to begin the arduous task of caring for your home lawn. University of Georgia Cooperative Extension has made the task a little easier through a few mobile apps for Georgia homeowners and green industry professionals alike.

“More and more people rely heavily on their smartphones and mobile devices, so experts in the UGA College of Agricultural and Environmental Sciences created mobile apps based on agricultural topics,” said Patrick McCullough, a UGA Extension weed scientist and developer of several turfgrass-related mobile apps.

McCullough developed a series of turf management apps that include photos of turfgrass varieties, pests, weeds and diseases. There are three versions: Turfgrass Management – Lite; Turfgrass Management – Subscription; and Turfgrass Management Lite (Spanish). The lite and Spanish versions are free. The subscription version costs $19.99 per year and includes the lite version, plus information on pest control applications and a pesticide database.

For the more serious home gardener, the Turfgrass Management Calculator app covers all types of applications, pesticide rates, fertilizer requirements, topdressing sand requirements, and calibration of sprayers and spreaders. It also converts units from standard to metric, includes more than 16,000 pre-programmed calculations and costs just $5.99.

Maxwell Lamptey is visiting America, specifically Griffin, Georgia, in the hopes of learning new methods to fight aflatoxin — a carcinogen produced by soil fungus that can grow on peanuts — in his home country of Ghana. Lamptey is participating in a short-term training program, from March to September, supported by the Peanut and Mycotoxin Innovation Lab (PMIL), housed at the University of Georgia’s College of Agricultural and Environmental Sciences.

A senior technical officer studying legumes at the Crops Research Institute, Lamptey has been working on the university’s campus in Griffin, Georgia, alongside food scientist and PMIL collaborator Jinru Chen.

Research is nothing new to Lamptey, but his work normally focuses on ways to increase yields.

“In Ghana, I am involved in conducting a lot of trials, evaluations and cross hybridizations of all kinds of legumes, but mainly cowpeas and groundnuts (peanuts),” he said.

On the UGA Griffin Campus, he is studying the use of solar drying to control aflatoxin contamination in peanuts. He is comparing solar drying to normal drying.

Normal drying involves exposing the peanuts directly to sunlight on the ground or on concrete. Solar drying does not expose the peanuts directly to sunlight or rain. Instead, a dryer captures the heat from the sun and an enclosed structure around the nuts conducts the heat, Lamptey said.

The University of Georgia’s College of Agricultural and Environmental Sciences (CAES), Warnell School of Forestry and Natural Resources and the Graduate School jointly hosted a graduate research event, focusing specifically on research conducted in south Georgia.

The reception, held Thursday, March 17, at the UGA Tifton Campus Conference Center, recognized 11 current graduate students who represented UGA’s campuses in Athens, Griffin and Tifton, Georgia, as well as the Robert W. Woodruff Foundation's Joseph W. Jones Ecological Research Center in Newton, Georgia. All of the student-scientists presented their research projects and spoke with invited guests about their work.

Among them was Shannon Parrish, who is pursuing a master’s degree in crop and soil sciences from CAES. Her research focuses on cotton’s sustainability in Georgia.

“As a graduate student, being able to present research (that) you have worked on is always exciting. With each presentation, I look forward to educating others on the importance of determining cotton’s sustainability in Georgia,” Parrish said. “I hope everyone I spoke to comes away from our encounter with an understanding of how vital cotton is to the state and the need for documenting the crop’s environmental footprint.”

Other UGA graduate students at the event and their areas of study include:

–Kiran Gadhave (CAES), studying plant-vector-virus interactions.

University of Georgia President Jere W. Morehead and other university administrators celebrated the opening of the 2016 Sunbelt Agricultural Expo by visiting the opening day of the three-day trade show Oct. 18 in Moultrie. 

This is the fourth consecutive year Morehead has taken part in the Expo festivities since becoming president of UGA in 2013. As he has in previous years, Morehead toured the UGA College of Agricultural and Environmental Sciences building at Spence Field where he spoke with student ambassadors and visited with key agricultural leaders in Georgia.

"I always enjoy returning to South Georgia for this exciting event and seeing firsthand the critical role that the University of Georgia plays in supporting the state of Georgia's agriculture industry," Morehead said. "Coming to Sunbelt is a highlight of mine every year, and I am thankful to have had the opportunity to show support for our wonderful College of Agricultural and Environmental Sciences."

For millennia, farmers used compost to return nutrients to depleted soil. Now researchers are searching for a way composting can help battle aflatoxin.

Ghana native Esther Yeboah Akoto, who is currently pursuing her master’s degree in food science and technology at the University of Georgia, is working to help farmers diminish aflatoxin contamination in their soil by composting field waste.

“We know that composting has been around for a very long time. It’s a technique that growers have used for thousands of years,” said Akoto, who is conducting her research in conjunction with U.S. Feed the Future's Peanut Mycotoxin and Innovation Lab at the UGA College of Agricultural and Environmental Sciences.

“More recently, we know about aflatoxin and its effect on health. Could composting provide a way to remove aflatoxin-contaminated produce from the food supply?”

Researchers around the world are working to minimize naturally occurring molds that can grow on peanuts, maize and other crops. Those molds diminish the quality of peanut crops and generate mycotoxins such as aflatoxin, a dangerous compound that can cause physical and mental stunting in children, cause cancer and, in high doses, even kill. Obviously, the most effective intervention is to minimize mold growth in the field and in storage, but farmers may never completely get rid of something as ubiquitous as mold.

Georgia farmers are never surprised to see fall armyworms munching on their precious corn, sorghum and forage hay crops. They just hope for a low number of armyworms. This year’s population of the tiny destroyers, described as an “Armageddon-type outbreak” by University of Georgia entomologist David Buntin, is far from low.

A small grains pest expert with the UGA College of Agricultural and Environmental Sciences, Buntin spends his days tracking insects that can destroy Georgia row crops and working to determine the best methods of controlling them and establishing pesticide thresholds, or the number of insects that need to be present before a farmer should apply a pesticide.

“This year, the fall armyworms are way, way above the treatment threshold. They are here in much, much higher numbers,” he said. “As of the end of August, almost every pasture in central and north Georgia has been sprayed at least once and, for many of them, twice.”

Each year, the worms migrate up from the Caribbean and Florida. This year, they showed up early in corn and sorghum fields. Now they are in pastures earlier than normal.

Researchers at the University of Georgia College of Agricultural and Environmental Sciences broke records in fiscal year 2016 with $69 million in external funding to fuel college projects.

From research plots across Georgia to state-of-the-art laboratories in Athens, Tifton and Griffin, CAES faculty members use this funding for research to support Georgia’s $74.3 billion agricultural industry and improve the food security and health of people around the world.

“This (achievement) was only possible because of the extraordinary efforts of our dedicated faculty, staff and graduate students,” said Sam Pardue, dean and director of CAES. “We’re proud of their creativity, their hard work and their commitment to identifying solutions to the challenges that face Georgia, our nation and the world.”

CAES’s external research funding totals helped contribute to a record-breaking year for research funding across the university.

In fiscal year 2016, research expenditures at UGA increased by 14 percent to reach $175.3 million. UGA's dramatic increase in fiscal year 2016 comes on the heels of a 7 percent increase in fiscal year 2015 for a 21 percent rise over the past two years.

More than 800 people braved the hot August temperatures for a firsthand glimpse of the latest research by University of Georgia scientists at the Turfgrass Research Field Day held Thursday, Aug. 4, on the UGA campus in Griffin, Georgia.

“UGA serves as the research and education arm for the green industry in this state,” said Clint Waltz, UGA Cooperative Extension turfgrass specialist and one of the organizers of the field day event. “This field day keeps those in the green industry current and provides the continued education they need to remain profitable and able to provide the best quality products for golf courses, commercial lawns, homeowners’ lawns, parks, recreational sports fields and professional sports fields.”

In the morning, green industry professionals rotated through a series of 12-minute talks by scientists from the UGA College of Agricultural and Environmental Sciences. Topics included the latest research on turfgrass weed management, cultivar development and the application of pesticides while protecting pollinating insects.

Self-guided tours in the afternoon included a demonstration on proper pesticide storage and handling, advice on the best fungicides for turfgrass disease control and sessions led by CAES turfgrass graduate students.