Browse Weeds, Diseases and Pests Stories

We have already ranked the best tomato cultivars for stacking high on a slice of bread and covered the essentials of pruning and staking to tame those wild, vining plants. Now comes the gritty middle of the growing season — when the heat bears down and the battle against pests, diseases and plant stress ensues. Whether you have only just started harvesting or are already preparing for a second planting to carry you into fall, Georgia’s hot, humid climate creates the perfect environment for problems.

Earlier this year, commercial beekeepers across the U.S. faced unprecedented winter colony losses, with some reporting over 60% of hives perishing — more than double the typical overwintering loss rates. Hobbyists and sideliners — those who keep bees as a secondary source of income — also saw catastrophic declines, with total economic impacts to beekeepers estimated at over $600 million. Now, scientists are linking the losses to high viral loads and mite resistance as they work to develop solutions to protect the industry moving forward.

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.