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Seecorn maggot larva feeding on a seed in a field.

Seedcorn Maggot Degree Day Activity Estimates: May 29, 2024

Many of the northern counties are approaching enough degree days for a peak second-generation seedcorn maggot emergence to occur.

Small white maggot next to a brown pill shaped pupa.

Monitor for Seedcorn Maggots in Wet Planted Fields

Current spring conditions, including wet soil and cool temperatures, could result in seedcorn maggot issues in South Dakota.

Producer with tablet observing a field in late autumn.

Critical Period of Weed Control: A good, but not perfect guideline

The critical period of weed control is the period during a crop lifecycle when weeds need to be managed to avoid a significant yield loss.

Small black and yellow beetle feeding on the green leaf of a canola plant.

Don’t Forget to Scout Canola for Flea Beetles

Canola emergence is well underway and ahead of emergence at this time in 2023. There are three species of flea beetles that commonly infest canola and feed on the leaves.

Two pictures of bright, green plants with yellow flowers.

Leafy Spurge or an Imposter?

Leafy spurge is a statewide noxious weed that can be difficult to manage. However, are the recent yellow flowers appearing throughout South Dakota landscapes leafy spurge or another species?

Four rows tilled through the three clover treatments

2023 On-Farm Experiences Growing Cucurbits in Newly Established Clover Living Mulch in Eastern South Dakota

Research report determining the impact of two established clover species on weed suppression, crop growth, and yield of squash.

Tan spot is a devastating disease of wheat in South Dakota and the rest of the wheat producing regions world over. It causes an estimated yield loss of about 5 percent in South Dakota but this loss can go up to 30 percent in individual fields.

Variety of vegetables growing inside a high tunnel.

SDSU Extension 2025 Garden Hour series starts May 6

May 02, 2025

/garden-yard/problems-and-solutions

A field divided into two planting areas. The left area has young corn plants emerging from the soil. The right has no visible corn emergence yet.

Grassy Weeds

Grassy weeds are a problem in all field crops. They must be identified at early stages of growth so they can be controlled before crop yields are seriously threatened. Control measures are not the same for all grassy weeds, so accurate seedling identification is important.

Corn plants and scattered weeds emerge from a dry, no-till field.

Dry Conditions May Hinder the Performance of Recently Applied Preemergence Herbicides

If a preemergence herbicide does not receive an activating rainfall, generally 0.5 to 1 inch of rain, many weeds will emerge, as the herbicide remains on the soil surface.