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News from the College of Agricultural and Environmental Sciences

European paper wasp on nest. CAES News
Stinging Biting Insects
As autumn approaches and the stifling heat of summer begins to cool down, spending more time outdoors may be on your radar. But, as Georgia is home to many stinging and biting insects, fall fun can turn into a minefield of discomfort. Elmer Gray, a research entomologist with the University of Georgia College of Agricultural and Environmental Sciences and specialist for UGA Cooperative Extension, shares information on some of the season's most common culprits, urging residents to stay vigilant and take preventive measures.
The Asian tiger mosquito has been recognized among the world's top 100 worst invaders according to the Global Invasive Species Database. It has an aggressive daytime human-biting behavior and can vector many viruses, including dengue fever and West Nile virus. CAES News
Prevent Spread of Dengue
As overnight temperatures increase during the summer, so do mosquito populations, bringing with them the risk of mosquito-borne diseases. In late June, the Centers for Disease Control warned that the U.S. is seeing an increased risk of dengue fever, a sometimes fatal viral disease transmitted by mosquitoes. This disease has been across much of South and Central America and the Caribbean, and with about 1,500 cases, the U.S. Commonwealth of Puerto Rico has declared a public health emergency over dengue.  
All mosquitoes require standing water for their larval and pupal stages to develop. As a result, any standing water that can be eliminated now is one less site where pest populations can develop when temperatures warm in the coming weeks. CAES News
Mosquito Season Prep
As January transitions to February, few of us are thinking about mosquitoes and the multitude of problems they can cause when spring arrives. But with January rain totals well above normal across the Southeast, it is a good time to take inventory of where standing water is holding and what can be done to eliminate it.
Abnormally dry conditions this summer have kept Georgia's mosquito populations mercifully low, but that's no reason for Georgians to let down their guard, especially this season. CAES News
Mosquito Season Ongoing
Cooler weather may be upon us, but as we open windows and head outside, it is important to remember that we are still in mosquito season. Recent rains have filled all of the containers, cracks and crevices that can hold water around our homes and neighborhoods. While working around my yard, I have found mosquito larvae in the bird bath, a garbage can lid and in the rim of a recycling container.
Adaptable and hungry, Argentine black and white tegus pose a significant threat to native wildlife, from gopher tortoises to ground-nesting birds. The public should report tegus seen in the wild, alive or dead. (Photo by Dustin Smith/Georgia DNR) CAES News
Report Tegus
Warming temperatures will have tegus on the move in southeast Georgia. Reporting sightings of tegus, alive or dead, is needed to keep the big, South American lizards from gaining a foothold in the state, according to the Georgia Department of Natural Resources.
Jena Johnson, a research professional in the Department of Entomology, has been interested in photography since graduate school, when she first experimented with a 35mm camera. Over the years, she’s honed her skills in both research and photography, now documenting a variety of insects with a macro lens. (Photo by Peter Frey) CAES News
Mosquito Metamorphosis
Jena Johnson, a lab manager in the Department of Entomology in UGA’s College of Agricultural and Environmental Sciences, captures what she observes working with mosquitoes and other insects in the lab of entomology professor Michael Strand. She finds scientific and artistic meaning in her photos, which offer a glimpse at both intriguing behavioral phenomena and unexpected natural beauty.
“Slugs, by their very nature, must have moisture to survive and are known to eat damp paper on occasion,” said Agriculture and Natural Resources Agent Paul Pugliese. “The moral of the story: We now know why the postal delivery service is called 'snail mail.'” CAES News
Snail Mail
Recently, a church trustee in Bartow County brought samples of “holey” mail to the local University of Georgia Cooperative Extension office for closer examination. Strangely, mail deposited in the church’s mailbox was showing up with holes chewed through the outer layer of the envelopes, but the mail inside was intact — a small miracle in itself.
Argentine black and white tegus, the largest of all tegus, can reach 4 feet long and weigh 10 pounds or more. CAES News
Invasive Tegus
University of Georgia Cooperative Extension is assisting the Georgia Department of Natural Resources (GDNR) in the effort to find and remove tegus from the wild in southeast Georgia, and the public’s help remains critical to keeping these big, South American lizards from getting a toehold in the state.
A brood of decades-old 17-year cicadas that have been perfectly preserved. CAES News
Brood X
It has been 17 years since a set of billions of periodical cicadas emerged from their underground chambers and filled the air with boisterous buzzing and desperate mating calls.
A supergene is a collection of neighboring genes located on a chromosome that are inherited together due to close genetic linkage. Studying these unique genes is important to understanding the potential causes for differences among the social structure of fire ants, specifically for controlling the species and building upon the existing knowledge base. CAES News
Fire ant supergene
A unique study conducted by University of Georgia entomologists led to the discovery of a distinctive supergene in fire ant colonies that determines whether young queen ants will leave their birth colony to start their own new colony or if they will join one with multiple queens. Researchers also found that ants were more aggressive toward queens who don’t possess the supergene, causing colony workers to kill them. This critical finding opens the door to new pest control methods that may be more efficient in eradicating problematic fire ant colonies.