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Dark colored caterpillar feeding on wheat head.

Scout for True Armyworms in Oats and Wheat

During most years, we start worrying about true armyworm activity in wheat fields in mid-July. However, the strong southerly winds that we experienced during the last two weeks pushed several insect pests north ahead of their normal schedule

Left: Brown moth with light markings present on a green leaf. Right: Brown moth with light markings present.

Army Cutworm Moths Among the Recently Reported Western Bean Cutworm Moths

Last week, we published an article about the presence of western bean cutworm moths being very abundant throughout Central and Western South Dakota. However, when talking with an entomologist from a neighboring state, they suggested the moths could also be army cutworm moths.

Green wheat stems with a gray slug feeding on them.

Slugs Causing Issues in Some South Dakota Wheat Fields

Slug activity in wheat fields has been reported in South Dakota. Although slugs are not normally an issue in South Dakota crops, they can pose a threat when field conditions are just right.

three grain bins in a flooded farm yard. Photo by John Shea, FEMA

Stored Grains and Flooding

According to the Food and Drug Administration, grain inundated by watercourses is considered adulterated and must be destroyed. The portion of the grain that is not affected by the water can still be salvaged for its use.

Three sets of rumen papillae photos. The first is labeled C and has several clusters of large, round, papillae. The second is DG1 and has several clusters of small to medium, round, papillae. The last is DG2 and has several clusters of small to medium, round, papillae.

Distillers’ Grains and Rumen Papillae Growth

Distillers grains are without a doubt one of the most versatile ruminant feedstuffs. Aside from their high concentration of sought-after nutrients (i.e. protein, energy, phosphorus), their impact on the digestibility of other feeds is minimal. In fact, by not interfering with the digestion particularly of structural carbohydrates, they allow for more energy to be obtained from forages.

A graph indicating rising corn yields and generally steady corn acreage from 1926 to 2016/2017.

Leveling the Playing Field for U.S. Corn

Corn grain has been for a long time the world standard when it comes to energy feeds for livestock. It has been traditionally a quite homogeneous, energy-dense feed, only surpassed from this perspective by oils and fats or by other feedstuffs also rich in lipids.

A stunted planting of corn with purple coloring on its leaves.

Fallow Syndrome: What is it and how do I deal with it?

Fallow syndrome received its name from the dry plains states, where fields routinely benefited from the additional moisture available after a year where the ground was fallowed. Corn sometimes had symptoms of phosphorus deficiency when grown on this previously fallowed ground, thus it received its current name, “fallow syndrome.”

a map showing the precipitation outlook for June 2020

Summer 2020 Climate & Drought Outlook

August 12, 2020

With alternating cool and warm weather patterns throughout the last few months and the summer season ahead, temperature continues to be a challenge for climate forecasters in South Dakota.

Corn plants with recently emerged tassel and ear in a field.

Flowering in Corn

Corn is at or near the most critical growth condition. Successful flowering and pollination are very important in determining the fate of the kernel setting and development. This article summarizes the pollination process and the effects of dry, hot conditions on pollination.

Top: Tan caterpillar with dark brown head on corn stalk. Bottom: Black caterpillar with light stripes and yellow-brown head capsule. Caterpillar also has small spines on body segments.

Caterpillars Active in South Dakota Corn Fields

Both European corn borer (Ostrinia nubilalis) and corn earworm (Helicoverpa zea) are active in corn fields. Sometimes the caterpillar activity and identity of these two species can be confused.