Content by Adam Varenhorst

Sod Webworm in South Dakota

Sod webworm moths are emerging throughout South Dakota. Although these pests are common during the fall, the number of moth sightings and population densities in the Western half of the state are higher than normal. The particular species being found is the vagabond sod webworm. Unlike several other webworm species found in the United States, vagabond sod webworms rarely cause much damage and the adult moths are no more than just a short-term nuisance.

Scouting Winter Wheat for Aphid Pests

Although we cannot predict aphid pressure in winter wheat, there are measures that may be taken to reduce the risk associated with these insects.

Root Weevils: Accidental Invaders

The latest insects to find their way inside South Dakota homes are the root weevils, a kind of beetle characterized by a distinct snout on the front of its head.

Why the 250 Threshold is Still Appropriate for Soybean Aphids

When gearing up for soybean aphid scouting, it is important to think about the population densities that warrant insecticide management.

Soybean Pests: Bean Leaf Beetles and Bean Pod Mottle Virus

With the number of bean leaf beetle observations in soybean fields during 2016, the need for monitoring soybean for Bean pod mottle virus (BPMV) development increases. Bean pod mottle virus was first identified in South Dakota in 1998, and is recognized as a very economically important disease in soybean due to the potential for it to cause devastating losses to soybean yields.

Black and Yellow Garden Spiders

As gardeners harvest the last of their produce, many are noticing the black and yellow garden spider (Argiope aurantia) living among the vegetation. This spider may also be observed in crops, or tall grass or weeds that provide protection for their webs. These spiders (at least the females) stand out because of their bright colors, large size, and distinctive large web. While they are often overlooked, the garden spider is common throughout the United States.

Gall Midge Larvae in Soybean Stems

Gall midge larvae were observed recently in soybean stems from a field in South Dakota. These insects were found under the epidermis of the stem that was slightly above the soil line.

I Found a Praying Mantis, Now What?

Praying mantises are one of the most distinctive large insects that can be found in South Dakota. Their striking appearance, size and perceived rarity contributes to the frequent calls and emails that we receive regarding sightings and captures of these insects.