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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.

A green leafy spurge plant with small, yellow bracts at top. Various brown and green plants surround the green leafy spurge plant.

Leafy spurge has germinated and is growing rapidly in South Dakota: Scout carefully!

Leafy spurge can reduce the value and productivity of pasture and displace desirable vegetation. Now is the time to scout for infestations to determine which management tactics will be most effective.

Color-coded map showing precipitation outlook for the United States. For a detailed description, please call SDSU Extension at 605-688-4792.

May 2025 Drought and Climate Update

Drought has plagued South Dakota since last year’s growing season. While producers welcome a spell of dry weather for planting spring crops at this time of year, recent moisture will not be enough to carry through the growing season.

A wheelbarrow full of harvested eggplants.

Eggplant: How to Grow It

Eggplant has culinary versatility, beautiful flowers and colors, and abundant yields. Learn some expert tips for planting, growing, and harvesting it in this resource!

Organic cabbage and sweet corn plants at the SDSU Southeast Research Farm.

Producing Organic Cabbage and Sweet Corn with Cover Crop Integration and Reduced Tillage: Updates from the SDSU Southeast Research Farm

Research on clover cover crops grown in combination with four tillage and weed suppression methods was conducted at the SDSU Southeast Farm. Vegetable crops trialed included sweet corn and three varieties of cabbage.

Green alfalfa weevil larvae with a white stripe running down its body.

Alfalfa Weevil Activity Prediction Update: May 22, 2025

Degree day accumulations for alfalfa weevil larvae indicate that third to fourth instar larvae should be active in fields throughout South Dakota.

Alfalfa weevil larvae and adult.

Alfalfa Weevils Are Active in Some Parts of South Dakota

Degree day accumulations indicate that alfalfa weevil larvae should be active throughout South Dakota.

A yellow beetle with a black head, and square black markings on its back standing on a soybean leaf.

South Dakota Overwintering Bean Leaf Beetle Predicted Mortality: 2024-2025

Each year we evaluate the overwintering success of bean leaf beetles in South Dakota. For adult bean leaf beetles that successfully overwintered, emergence will begin in the spring and they will move into soybean fields.