Filtering by tag: urban trees ✕

False oleander scale on Magnolia grandiflora. Photo: SD Frank

Time to Monitor False Oleander Scales

False oleander scale, Pseudaulacaspis cockerelli, is a tropical and subtropical pest originally from China. It is common throughout many southern states but just reaches the very warmest parts of…

Larvae of the larger elm leaf beetle. Photo: Gerald J. Lenhard, Louiana State Univ, Bugwood.org

Larger Elm Leaf Beetle

Elms have lots of pests. This week I have had several reports of larger elm leaf beetles, Monocesta coryli, infesting elms around Raleigh. I have not been able to find a specimen to get pictures. The…

Imported willow leaf beetles and feeding damage on willow. Photo: SD Frank

Imported Willow Leaf Beetles

You can find a lot of damage on willows this time of year because imported willow leaf beetles have been feeding all summer. Imported willow leaf beetles (Plagiodera versicolor) are common on willows…

Sawfly larvae, probably Caliroa quercuscoccineae, on a red oak and the window pane damage they cause. Photo: SD Frank

Sawflies Feeding on Oaks

Oaks have hundreds of herbivores so it is no wonder that towards the end of summer some of the leaves show all types of feeding damage. Last week I found many trees with leaves that had damage called…

Beech blight aphids (Grylloprociphilus imbricator) on a beech twig. Photo:SD Frank

Beech Blight Aphids

You might notice twigs on beech trees covered in a woolly sleeve. Get closer and it will begin to wiggle and sway. This is a group of beech blight aphids ( ). These are very fun to watch and a great…

Oak lace bug adults, nymphs, and eggs on the underside of an oak leaf. Photo: SD Frank

Oak Lace Bug Damage

Oak lace bugs (Corythucha arcuata), like other lace bugs, cause stippling on leaves. Oak lace bugs, of course, feed on oak leaves just as sycamore lace bugs feed on sycamore and azalea lace bugs feed…

Fall webworm nest. Photo: SD Frank

Fall Webworms

Fall webworms, one of our native insect pests, are a perennial nuisance and in some cases a destructive pest. I have seen lots of large nests lately in sourwood, choke cherry, other Prunus species,…

Late instar orangestripped oakworm larva on a sidewalk with frass. Photo: SD Frank

Orangestripped Oakworms Hatching

Orange striped oakworms started hatching in Raleigh this week. They have one generation per year. Adults emerge in mid summer and lay clusters of yellow eggs on the bottom of oak leaves. Young…

Oak spider mite damage on pin oak leaves. Photo: SD Frank

Summer Brings Spider Mites

Most tree species are fed upon by spider mites and many even have their own species. These include maple spider mites, magnolia spider mites, honeylocust spider mite, the generalist twospotted spider…

Oak spider mite (Oligonychus bicolor) and stippling damage on a pin oak leaf. Photo: SD Frank

Oak Spider Mites Cause Damage to Street, Landscape, and Nursery Trees

This week I have noticed damage on many pin oaks (Quercus falcata) by oak spider mites (Oligonychus bicolor). Oak spider mites look much like related mites such as southern red mite (O. ilicis),…