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Two flies side-by-side. The left fly is a Western horse fly. The right fly is a deer fly.

Horse Flies and Deer Flies Becoming Abundant

The above-average precipitation this year has led to increased numbers of horse flies and deer flies across South Dakota. Widespread flooding and an overall abundance of available water has made conditions perfect for these flies.

Adult female emerald ash borer

Emerald Ash Borer Life Cycle in South Dakota

This fact sheet is a general description of the emerald ash borer life cycle in South Dakota.

Numerous nymph grasshoppers feeding on corn.

Large Grasshopper Populations Detected in South Dakota

Very large populations of grasshoppers have been detected in southeastern South Dakota. Although these grasshoppers aren’t causing serious defoliation in crops yet, there is the possibility that they will as the season progresses.

A pasture containing a mixture of grasses and alfalfa.

An identification guide for Alfalfa Insect Pests in South Dakota

Pictorial guide for common insect pests of alfalfa in South Dakota

A sprawling sorghum field ready for harvest

An identification guide for Sorghum Insect Pests in South Dakota

Pictorial guide for common insect pests of sorghum in South Dakota.

Map of South Dakota with green (zero to three grasshoppers), orange (four to seven grasshoppers), and red (8 or more grasshoppers) dots indicating grasshopper populations that were sampled in 2021. The north central region, west of the Missouri River, has the highest concentration of red and orange dots.

South Dakota Grasshopper Prediction for 2022

Data from the 2021 USDA Adult Grasshopper Survey of South Dakota suggests that grasshopper populations may continue to be problem in parts of central and western South Dakota during the spring of 2022.

A small black bug with tan margins on its wings resting on a grass seed head.

Black Grass Bugs May Cause Issues if Drought Persists

In western South Dakota, black grass bugs are a common spring forage pest that can cause considerable damage during periods of drought. Learn how to monitor and manage this pest to protect your forages this spring.

Left: Adult honey bee. Right: Bicolored striped-sweat bee

Beneficial Pollinators: Honey Bees and Bicolored Striped-Sweat Bee

With temperatures increasing in South Dakota, expect to see an increase of beneficial pollinators searching for blooming plants. Learn about two important pollinators, the honey bee and the native bicolored striped-sweat bee.

Cream colored larvae feeding on sunflower seed.

An identification guide for Sunflower Insect Pests in South Dakota

Identification guide to assist with insect identification and management in sunflowers.