Insect Pests

The Asian longhorned beetle is a non-native pest that threatens a number of hardwood trees in North America. The larva damage living trees as they tunnel through. History of Asian Longhorned Beetle The Asian longhorned beetle was first identified in New York City...

They’re baaaack. If you’ve spent much time outdoors recently, there’s a chance you’ve had an encounter with buffalo gnats. What do they look like, and what do they do? Buffalo gnats (Simuliidae), also known as black flies, are small, 1/16- to 1/8-inch-long, ...

Emerald ash borer (Agrilus planipennis) or EAB has cut a wide swath of destruction across a large portion of the United States, including Illinois. EAB has been responsible for the death of tens, if not hundreds, of...

Butterflies are among the most popular, if not the most popular, insects out there. In fact, many cultures around the world use a butterfly as a symbol of the human soul. Many people consider a butterfly landing on you to be...

Wasps have an undeserved bad reputation. While some species can be a tad on the aggressive side, they are, as a whole, rather beneficial. Admittedly they can be intimidating insects, particularly large ones. In 2020, Extension received more reports about large wasps than usual. Perhaps it’s...

Several different types of caterpillars will feed on tomatoes. The most well-known, and probably most dreaded, are the tomato (Manduca quinquemaculata) and tobacco (Manduca sexta) hornworms. These large (up to 4 inches long) green caterpillars have a prominent “horn” on their rear...