If you've walked outside lately and noticed shiny, metallic green bugs clustered on your rose bushes or crape myrtles, you're not imagining things. Japanese beetles are out in force across Nashville, Charlotte, Greenville-Spartanburg, Atlanta, and Dallas-Fort Worth right now, and they've got quite an appetite. Here are the answers to the questions we hear most this time of year.
Japanese beetles are about a half-inch long, with a shiny copper-colored back and a metallic green head and thorax. They're easy to spot once you know what to look for, and unfortunately, they're rarely alone. These beetles feed in groups, which is why damage can go from "barely noticeable" to "wow, what happened here?" in just a few days.
They showed up in the U.S. over a century ago and have since made themselves right at home across the Southeast, where warm summers and plenty of turfgrass give them exactly what they need to thrive.
Japanese beetles have a pretty predictable annual schedule. Adults emerge from the soil in early summer, and their feeding activity peaks from late June through early August across our service areas. So if late July feels like beetle central, that's because it is. Adults typically stay active for six to eight weeks before their numbers naturally taper off toward late summer.
During this window, they're doing two things: eating as much foliage as possible and laying eggs in your lawn's soil. Those eggs hatch into grubs, which is where things get interesting for your grass, too (more on that below).
Above ground, Japanese beetles are famous for "skeletonizing" leaves. They chew away the soft tissue between the veins, leaving behind a lacy, see-through pattern that can make a plant look scorched from a distance. Their favorite targets include roses, crape myrtles, hibiscus, and birch trees though they'll sample quite a few different landscape plants when given the chance.
Below ground is where it circles back to your lawn. The eggs beetles lay in July hatch into white grubs by late summer, and those grubs spend the fall munching on grass roots. If you've ever dealt with soft, spongy patches of lawn that pull up like carpet, grubs were likely the culprit. So the beetles you're swatting off your crape myrtle today are directly connected to grub damage you might see in your Bermuda or Zoysia lawn later this year.
This is one of the biggest myths out there, and we get asked about it constantly. Those bag-style Japanese beetle traps sold at hardware stores use a floral and pheromone lure that attracts beetles from a wide area. The problem is the traps don't catch nearly as many as they lure in, so you often end up with more beetles in your yard than you started with, not fewer. If you're going to use one, place it well away from the plants you're trying to protect, not near them.
For plants that are already being damaged, hand-picking beetles into a bucket of soapy water in the early morning (when they're slower and less likely to fly off) can make a real dent in smaller infestations. For heavier pressure on valuable shrubs and trees, a targeted treatment applied by a professional can protect foliage through the peak feeding window without harming beneficial pollinators when applied correctly.
But here's the part homeowners often miss: since this summer's beetles are laying next season's grubs in your lawn right now, the most effective long-term strategy addresses both ends of the life cycle. Treating your lawn for grubs in late summer, before they've done real root damage, is one of the best ways to reduce next year's beetle population before it even starts.
Healthy, well-maintained trees and shrubs recover from beetle feeding far better than stressed ones. Plants that are already struggling with drought stress or poor nutrition show damage more severely and take longer to bounce back. Regular deep root fertilization keeps trees and shrubs resilient, so a few weeks of beetle feeding doesn't turn into a lasting setback.
Learn more: Get Rooted: Fall Secrets for Thriving Trees and Shrubs All Year
Japanese beetles are a summer nuisance across the Southeast, but they don't have to win. Between now and early August, keep an eye on your roses, crape myrtles, and other favorite plants, and don't count on a trap to solve the problem for you.
If beetles have already done a number on your trees and shrubs, or you're wondering whether grubs might be setting up shop in your lawn for later this year, Top Turf's Tree and Shrub Care and Grub Control programs can take a look and put together a plan that protects your landscape now and heads off next year's beetle population before it starts. Give us a call, and let's get your yard back on track.