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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.

A medium-sized shrub with many upright stems next to a white shed

Woody Weeds: Tatarian Honeysuckle

Tatarian honeysuckle (Lonicera tatarica) was brought to North America from Asia in the mid-18th century for ornamental uses. In South Dakota it was also used as a windbreak species until the 1980s.

Several wrapped bales of hay lined up near a barn.

Round Bale Storage Conservation

Fact sheet discussing conservation of round bale storage.

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

Map of South Dakota showing Fusarium head blight risk. Green indicates low risk, yellow moderate risk, and red high risk. Most of the state is green except for scattered, yellow areas within Edmunds, Faulk, Hyde, Hand, Buffalo, Jerauld, Brule, Aurora, Turner, Lincoln, McCook, Lake, Brookings, and Kingsbury counties. Some red, high risk areas are in Buffalo, Brule, Hyde, and Minnehaha counties.

Fusarium Head Blight Predicted Risk for Spring Wheat

Most of the spring wheat is at or will soon be at flowering. One disease that can develop in wheat at this growth stage is fusarium head blight (FHB or scab).

Diseases on three different wheat plants. From the left: powdery mildew, fusarium head blight, and leaf rust.

Winter Wheat Diseases Update

Powdery mildew, fusarium head blight and leaf rust were observed in a few winter wheat fields recently scouted. The recent rainfall showers and warm temperatures have favored these diseases to develop in winter wheat.

Green soybean plant with white mold present on the stem and pod.

Start of Flowering Is the Ideal Time for White Mold Management in Soybeans

Some early planted soybeans are starting to flower (R1 growth stage). One soybean disease that needs to be managed at this growth stage is white mold.

Two photos of oat plants exhibiting fusarium root and crown rot. Left: An oat tiller with pinkish color on the crown and first node indicative of Fusarium root and crown rot. Right: Green oat plant with yellow, dry markings throughout indicative of Fusarium root and crown rot.

Fusarium Crown and Root Rot Observed in Oats

Some oat fields are showing plants wilting with tillers dying prematurely and heads looking bleached. Inspecting the crown and sub-crown area reveals the discoloration and rotting and sometimes a pinkish color can be observed. These are typical symptoms of Fusarium root and crown rot.

Green and yellow grasshopper resting on a head of wheat.

Grasshoppers Are Causing Concerns in Close-to-Harvest Winter Wheat

During the end of last week, we received reports of grasshoppers feeding on winter wheat that was close to being ready to harvest. One of the questions with the report was, “What insecticide can be sprayed that won’t delay harvest?”

A mostly green corn leaf that is in brown to yellow markings caused by southern rust.

Is a Fungicide Applied at Tasseling Profitable in Corn?

Corn is currently at tasseling/silking across the state. This is usually the growth stage when a fungicide is applied to control fungal diseases.