Search

Blue green aphids present on a corn tassel.

Aphid Populations Observed in South Dakota Corn Fields

During the last week, we have observed low level aphid populations in corn fields. Although aphid populations can reach high densities in corn, their presence doesn’t indicate guaranteed yield loss.

Dense swarm of mosquitoes in the evening sky

West Nile Virus Update: July 29, 2026

As of July 30, 2026, the South Dakota Department of Health indicated that West Nile Virus positive mosquito pools have been detected in Brown, Codington, Hughes, Lincoln, and Minnehaha counties in South Dakota.

Green leaf with light colored aphids feeding on it.

Soybean Aphid Populations Have Reached Economic Threshold

Based on recently scouting observations, the economic threshold for soybean aphids has been reached. Once thresholds are reached, fields should be reevaluated in 3 to 4 days to confirm the populations didn’t decrease, and if they persist or increase, they should be treated.

Brown weevil adult with dark band down center of its body.

Alfalfa Weevil

Factsheet on Alfala Weevil identification, lifecycle, damage, scouting and management.

Green cloverworm caterpillar, Thistle caterpillar, and Oblique banded leaf roller.

Several Species of Caterpillars Are Actively Defoliating Soybean

There are several species of caterpillars that have recently been observed in a single soybean field. The species include the green cloverworm, cabbage looper, alfalfa, thistle, and oblique banded leaf roller caterpillars.

Aug 14

Dakota Sunflower StoryWalk

SDSU Extension will host a StoryWalk during the Fort Thompson Annual Wacipi, August 14-16, from 8:00 a.m.-5:00 p.m. each day at the Fort Thompson Powwow Grounds.

Family jogging together on a rural exercise trail.

Physical Activity

Everyone can benefit from moving their bodies more throughout each day, and all types of activity count towards your daily goal.

Little black bugs on a yellow flower

SDSU Extension experts win national agricultural association awards

July 30, 2026

South Dakota State University Extension experts were recognized nationally for their excellence in outreach and Extension programming.

a yong man presenting to a group of people

Growing Connections: An Organizational Map of the South Dakota Local Food System

Behind every farmer’s market, community supported agriculture share, or local food event is a network of advocates, educators, and organizations that make it all possible. The South Dakota Local Food System map illustrates the organizations that strengthen local food through a variety of roles and functions.

Bumble bee foraging on a pink swamp milkweed flower.
Sep 12

Insect Festival

SDSU Extension and McCrory Gardens will host the Ninth Annual Insect Festival on Saturday, September 12, 2026 from 1:00 to 4:00 p.m. CDT at McCrory Gardens (631 22nd Ave, Brookings, SD 57007).