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Three images of a small fly on gray background and also present on a penny. For an in-depth description, call SDSU Extension at 605-688-6729.

Soybean Gall Midge Adults Captured in South Dakota

Although soybean gall midge adults have been captured earlier this spring in neighboring states, the first adults were captured in South Dakota on June 17. So far, our captures are low with one adult at two locations near Burbank and Meckling.

Nitrate QuikTest for Forages

The Nitrate QuikTest for Forages is available at various SDSU Extension locations and veterinary clinics across the state and is designed to be used with standing forages prior to harvesting for hay or grazing.

Rangeland covered with dense thickets of maturing cedar trees.

Cedar Trees and Rangeland Loss

The issue of cedar tree invasion into South Dakota’s rangelands tends to be a regional conversation. There is generally broad agreement among most resource professionals that these trees are in fact changing our landscape in a negative way.

Eight green beetles in a row in the top half of the image and a row of seven yellow beetles with varying black stripes in the bottom half of the image.

Corn Rootworm Egg Hatch Estimates

Corn rootworms overwinter in the soil as eggs and hatch in the spring when enough soil degree days have been accumulated. Based on soil degree day accumulations, most of South Dakota has reached 50% corn rootworm egg hatch.

White and red caterpillar feeding within silken hideout on green soybean leaf.

Thistle Caterpillars Observed on Canada Thistle

Although thistle caterpillars are normally first observed in July or August, it is possible for them to appear earlier if weather conditions are favorable. While these caterpillars are generally not present in high numbers, they can cause severe defoliation.

A brown soybean stem with three bright orange larva on it.

Soybean Gall Midge Larvae Observed in South Dakota

Soybean gall midge emergence continues to be slow in South Dakota. In the past week, two additional adults have been captured in South Dakota.

Green soybean with wilting/dying soybean within the same row.

Soybean Gall Midge Larvae in South Dakota Soybean

Soybean gall midge larvae were observed in South Dakota soybean this week. Although insecticide applications haven’t been very effective at this stage, it is still important to scout fields and determine the location and extent of soybean gall midge infestations.