Insect Identification and Management

Emerald Ash Borer Found Closer to Nebraska
By Nicole Stoner, UNL Extension Horticulture Educator

EABAn invasive insect pest has moved closer than ever to Nebraska, Emerald Ash Borer. Emerald Ash Borer, EAB, has not been found in Nebraska, but it now has been confirmed that it was found around Kansas City on both the Missouri and Kansas side.

EAB was first found in the United States in 2002, killing ash trees in southeast Michigan. EAB was probably transported to the United States a few years before the confirmed presence on solid wood packing material, such as pallets. Currently, Emerald Ash Borer has been found throughout much of the northeast portion of the United States, but it has not been found in Nebraska. Prior to 2012 the closest locations of EAB were in Minnesota and one hitchhiker found in southeastern Missouri. After this past summer, officials of the United States Department of Agriculture have confirmed the presence of Emerald Ash Borer in the surrounding areas of Kansas City on both the Missouri and the Kansas sides of the state line.


Brown Marmorated Stink Bug
By Nicole Stoner, UNL Extension Horticulture Educator



BMSBA new insect pest that we may begin to see as summer temperatures finally cool down and we go into fall is Brown Marmorated Stink Bug, or BMSB. This insect is a serious problem on many different plants, but we really begin to notice them in the fall when they move into our homes in swarms to overwinter inside, with us.

Brown Marmorated Stink Bug is a native of Asia, mainly China, Korea, Japan, and Taiwan. This invasive insect was brought to Pennsylvania, probably on a wooden crate in 1996, and was not found until 2001 in Allentown, PA. BMSB is a stink bug, with their typical shield-shaped body. It is mottled brown color with white lines on the antennae. It also has alternating spots of white and brown down the sides of the wings. BMSB is about 5/8 inches long. There are many other insects and other stink bugs that look very similar so correct identification is important. Bring any suspect insects to your local UNL Extension office for correct identification.



Fall Webworm
By Sarah Browning, UNL Extension Horticulture Educator

Image of Fall webwormLate summer and fall is the season of fall webworm. Fall webworm attacks many hosts, over 85 known species of deciduous trees, including elm, hickory, pecan, plum, chokecherry, poplar, walnut and willow. In fact, almost all fruit, shade and ornamental trees, except conifers, can be affected by fall webworm. A similar insect, called Mimosa webworm, is very common on honeylocust.

Homeowners often spot fall webworm as they enlarge their silken webs in late summer. Adults of this native insect are white moths, with reddish-orange front legs and a 1.25 inch wingspan. Immature insects are pale yellowish caterpillars with red heads and reddish-brown spots. An alternate color variation among the larva is yellow-green caterpillars with black heads a broad dark stripe on the back and black spots. The caterpillars have many long, fine hairs on their backs. There are one to two generations per year in Nebraska.