Browse Weeds, Diseases and Pests Stories

Renowned mycologist Marin Brewer has been appointed as the new head of the Department of Plant Pathology at the University of Georgia's College of Agricultural and Environmental Sciences. A distinguished scholar and educator, Brewer joined CAES in 2011 and was named the William Terrell Distinguished Professor in 2022. Her research has focused on the evolution and diversity of plant-pathogenic fungi, with particular interest in fungicide resistance, host specialization and fungal mating systems.

As summer approaches and regular rainfall continues, now is the time to focus on managing local mosquito populations. During recent work around my home, I found mosquito larvae in nearly every object that could hold water: the birdbath, plant trays, dog water bowl, garden buckets — you name it. If they are in my yard, they are probably in yours, too. Mosquitoes require standing water for their eggs, larvae and pupae to develop.

Make room, Joro spiders. There’s another invasive species taking over Georgia yards this summer. The Asian needle ant is becoming infamous as a “medical pest.” Although this type of ant has been around in the U.S. since the 1930s, its spread through the Southeast marks a significant danger for those with allergies to other insects like wasps or yellowjackets, said Dan Suiter, an Orkin Distinguished Professor of Urban Entomology in the University of Georgia College of Agricultural and Environmental Sciences and UGA Cooperative Extension.

As temperatures warm up and summer approaches, a surge in stinging and biting insects can quickly turn a fun day outside into an itchy, uncomfortable ordeal. Elmer Gray, a research entomologist with the University of Georgia College of Agricultural and Environmental Sciences and specialist for UGA Cooperative Extension, shares insight into the most common insect pests of the season — and how to protect yourself and your family.

Researchers at UGA working with fire ants are trying to understand how a small group of ants can convince a larger group to change a fundamental aspect of their behavior—whether they kill or nurture multiple queens. Their work was published this week in the Proceedings of the National Academy of Sciences. The lead author is Haolin Zeng, a postdoctoral researcher at the University of Georgia Odum School of Ecology who completed his PhD at the UGA College of Agricultural and Environmental Sciences in 2022.

Five University of Georgia faculty have been named Fellows of the American Association for the Advancement of Science, bringing the university’s total membership in the exclusive group to 50. UGA’s new Fellows, including Melissa Mitchum of the College of Agricultural and Environmental Sciences, are elected each year by the AAAS Council to recognize scientific achievements.

People love the taste of sugar beets’ primary byproduct: white sugar. Soilborne cyst nematodes — parasitic, microscopic worms — enjoy the root vegetable, too, but as their sole food source. It’s an obstinate, expensive problem for farmers that researchers at the University of Georgia’s College of Agricultural and Environmental Sciences are working to solve.

Native to several Asian countries, the spotted lanternfly (Lycorma delicatula) was first detected in the United States in 2014 in Pennsylvania, likely arriving via imported goods. Since its arrival, the pest has spread to 15 states in the Eastern U.S., now including Georgia. While they do not bite or sting humans or animals, University of Georgia experts stress that early detection, prevention strategies and timely interventions are crucial to minimizing the spread and impact of this pest on a variety of plants.

A multidisciplinary team of UGA researchers aims to enhance the competitiveness of Vidalia onion growers in Georgia by providing them with the ability to confidently detect onion diseases early, enabling them to make management decisions on their crop at a critical time. These abilities, researchers say, should result in increased yield and quality of marketable onions and an overall increase in efficiency and productivity.

The spotted lanternfly (Lycorma delicatula), an invasive insect pest that first arrived in Pennsylvania in 2014 and has since spread to 16 additional states in the Eastern U.S., has state governments urging residents to be on the lookout and to use caution when moving firewood. The insect’s preference for feeding on the tree of heaven (Ailanthus altissima) — another invasive species — has led to significant pest reservoirs, affecting vineyards and other agricultural sectors, including hardwoods and other ornamental and fruiting trees.