Insect & Pests

It’s Time to Scout Alfalfa for Cutworms

One of the earliest insect pests that can be found in South Dakota’s alfalfa fields are army cutworms. Injury from cutworms can sometimes be overlooked until large patches of an alfalfa field have been “cut.”

Check Your Bins This Spring

As it warms up this spring, don’t forget to check the bins. Grain bins work as solar heat collectors, and the grain inside of them may be much warmer than expected.

Monitor Wheat for Early-Season Cutworm Activity

It's finally warming up in South Dakota, and insect activity in wheat fields will be increasing. For wheat, a couple of early-season pests that may already be active are the army cutworm and the pale western cutworm.

Drought Conditions Magnifying Impact of Black Grass Bugs

With much of South Dakota continuing to experience moderate-to-extreme drought conditions, black grass bugs could become a concern in some areas. Large populations of black grass bugs can cause severe damage to pasture.

Be On the Lookout for Ticks

Ticks are one of the first pests to show up during spring. Learn some common ticks to watch out for in South Dakota, along with tips for preventing bites and removing ticks from your skin and clothing.

Alfalfa Weevil Activity Prediction Update: April 29, 2021

With another warmer week in the forecast, the need to scout for alfalfa weevils continues. Based on current degree day accumulations, overwintering alfalfa weevil adult activity is likely throughout all of South Dakota.

Alfalfa Weevil Activity Prediction Update: April 22, 2021

It was another cool week without a lot of degree day accumulations. With warmer temperatures in the upcoming forecast, the need to scout for alfalfa weevil activity will increase.

Sioux Falls to Host Emerald Ash Borer Tree Injection Workshop

April 21, 2021

As the season for emerald ash borer treatments nears in South Dakota, state forestry experts want applicators in the Sioux Falls area to be prepared.

Do You Have True White Grubs in Your Pasture or Rangeland?

Grub damage to pastures and rangeland is often observed in South Dakota. From past observations, some of the heaviest infestations in the state are located near the Missouri River.

Dry Conditions Could Lead to Early Twospotted Spider Mite Infestations

Although it isn’t an insect, the twospotted spider mite is an occasional pest of crops in South Dakota, and its populations can rapidly increase during dry conditions.