Category Archives: Pests of landscapes
Emerald ash borer makes a move
Ever since the dreaded emerald ash borer (EAB) showed up in Arkansas and Louisiana, tree lovers have braced themselves for its inevitable arrival in Texas. Then, in May 2016, the insect was discovered in a single surveillance trap near Caddo Lake in Harrison County in east Texas. In 2017 all was quiet, with no officially reported sightings; but this summer the beetle has been found in possibly three new counties. What is EAB? The EAB is a small but powerful beetle pest–an enemy of ash trees. Adult beetles… Read More →
Oak catkin mirid
Naturalists in Texas have no shortage of interesting insects to observe. If you were paying attention over the past couple of weeks, you may have noticed a small bug present in large numbers, especially around live oak trees. I’ve received several samples, some of which were sent by curious homeowners and some by pest control professionals. In some cases, they were observed clustering around doorways, other submitters just remarked that they were “very common right now.” Given the large number of small brown plant bugs on Bugguide, I… Read More →
Treehoppers
Every year brings its own oddities of entomology. Some years caterpillars strip trees bare in the spring, other years grasshoppers arrive in hoards. This spring I’ve had a couple of reports of a small insect called a treehopper, sometimes in large numbers. Treehoppers are surely one of the most curious looking insects encountered by gardeners. They feed on plant sap, like many insects found in trees, but rarely seem to do much damage. The most distinctive feature of the treehopper family is an upright, fin-like structure arising from… Read More →
2nd Edition of Garden Insects of North America
The Master Gardeners I have trained over the years may remember the big stacks of books I bring with me to every insect class. I love books and use them a lot in my job. One of the most useful references I use and recommend to Extension volunteers is the Princeton University Press Garden Insects of North America. It’s been a great resource, and a bargain to boot, since it came out in 2004. Now Garden Insects of North America has a second edition. The original author, Whitney Cranshaw… Read More →
Mealybugs on hibiscus common this summer
Mealybugs are perhaps best known as pests of indoor plants. But occasionally mealybugs strike outdoors flowers and shrubs. The striped mealybug, Ferrisia virgata Cockerell, is one such pest that has been showing up in Texas gardens this summer. Mealybugs are pests that feed on plant sap. Most are white in color, from a white wax produced by special glands on the tops and sides of their bodies. The patterns, form and length of the waxy filaments on mealybug bodies help us identify the different species of mealybugs. The striped… Read More →
Tiniest turfgrass pest
A tiny turfgrass pest appears to be on the increase according to researchers and lawn care experts. The Bermudagrass stunt mite (BSM), Eriophes cynodoniensis, is one of our tiniest arthropod pests of lawns. A relative of the mite that transmits rose rosette disease, the BSM lives inside the leaf sheaths of grass. In home yards it is pretty common (but not often recognized by homeowners as a pest). Golf course managers, on the other hand, who are expected to consistently provide billiard table-smooth putting surfaces, consider BSM a… Read More →
Caterpillars in fall not so bad
Finding a caterpillar on a plant or tree in your backyard can be cause for excitement. But they should be little cause for concern, especially during the fall months. To most human eyes caterpillars are alien creatures. With their squishy, worm-like bodies, and accordion gait, they are weirdly unique among other insects. Some are large and fantastically showy. Others have ominous-looking barbs and hairs. And some are skillfully camouflaged, nearly invisible among the leaves and shadows. When gardeners do encounter a caterpillar, reactions range from “cool!” to “yuck!!!” Caterpillars, of course, are the larval stage of moths and… Read More →
Girding our loins for emerald ash borer
The emerald ash borer (EAB) that has devastated ash trees throughout the Ohio River valley and Great Lakes region has finally made its way to the Lone Star State. So far the beetle has been found in only one location in Harrison County, next to Caddo Lake; but over the next few years it will continue to spread. As it does, it will slowly change the face of our native forests as well as our urban tree landscape. To prepare for the inevitable changes, Holly Jarvis with Texas A&M… Read More →
Turning the tide against ash borer?
On one hand, we’ve learned a lot about how to fight emerald ash borer with pesticides in the past 14 years since it was first discovered devouring ash forests in Michigan. But we’re still learning how nature keeps EAB in its place in its native Asian home. Insect parasites and predators are almost certainly the reason EAB is not a major pest on the other side of the globe. If only we could put some of those same beneficial insects to work for us! Then maybe we could… Read More →