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Seecorn maggot larva feeding on a seed in a field.

Seedcorn Maggot Degree Day Activity Estimates: June 3, 2021

We are currently between the second and third generation peak emergences in South Dakota. Seedcorn maggot management must be done before planting, or the populations can be avoided by not planting during times of peak emergence.

Purple-brown caterpillar with orange head on a green corn leaf.

Common Stalk Borer Activity Estimate: June 3, 2021

We still haven’t reached the degree day accumulation levels to see common stalk borers moving into corn fields. However, if weeds and grass are sprayed out along field borders, there is a very high probability that they will be forced into corn early.

Green corn leaf with ragged holes through-out caused by common stalk borer feeding.

Common Stalk Borers Observed in South Dakota Corn

While scouting corn this week, clear signs of common stalk borers were observed. Although our degree day estimates indicate that common stalk borers probably aren’t moving into corn yet, they can be forced into corn fields in certain situations.

Green beetle larvae with a white stripe running down its body.

Alfalfa Weevil Activity Prediction Update: June 3, 2021

It has been a busy week for alfalfa weevils. Throughout the state, alfalfa weevils have been causing significant feeding damage. We recommend scouting alfalfa fields for the next week and treating when necessary.

Aflafla field with light colored alfalfa mixed in with green alfalfa.

Why’s My Alfalfa Field Turning White?

There have been a lot of reports of alfalfa fields in South Dakota with a white or light-brown canopy. This discoloration is the result of extensive alfalfa weevil larvae feeding.

soybean pods

Next 'Notes from the Field' Webinar to be held June 4

June 01, 2021

South Dakota growers and agribusiness professionals are invited to join soybean research and Extension specialists from land-grant universities across the country as they host the monthly webinar series, "Science for Success: Notes from the Field."

Purple-brown caterpillar with orange head on a green corn leaf.

Common Stalk Borer Activity Estimate: May 27, 2021

Throughout South Dakota, we still haven’t accumulated enough degree days for common stalk borers to begin moving into corn, which is a good thing. At this point in time, common stalk borer activity is still going to be limited to weeds and grassy weeds.

Seecorn maggot larva feeding on a seed in a field.

Seedcorn Maggot Degree Day Activity Estimates: May 27, 2021

In South Dakota, we have accumulated enough degree days across the state that the peak emergence of the overwintering seedcorn maggot population has passed. In most of South Dakota, we are at peak emergence of the second generation or slightly past it.

Vast, rolling rangeland near the Black Hills of South Dakota.

'Good, Bad and Invasive Plant Tour' set for June 3

May 28, 2021

This year's tour will take place on June 3 from 9 a.m. to 3 p.m. (CST) at Sica Hollow State Park near Sisseton.

Garden plant surrounded by a layer of wood chip mulch.

Organic Garden Mulches To Conserve Moisture and Prevent Weeds

If you want to reduce time spent in your vegetable and flower gardens watering or pulling weeds, consider mulching the soil surface with an organic material to improve plant health and your enjoyment of the garden.