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Crop Management

All Crop Management Content

Green corn leaf with common stalk borer caterpillar within.

2019 Common Stalk Borer Activity Estimate

The hatching and movement of common stalk borer caterpillars can be estimated by using degree days with a developmental threshold of 41 degrees Fahrenheit. Common stalk borer eggs typically begin to hatch at 575 degree days.

South Dakota soybean late plant date map. View pdf map:  View text in Excel:

Multi-Peril Crop Insurance: Delayed and Prevent Plant Choices

Crop insurance late plant dates are fast approaching for planting crops in South Dakota. The weather and soil conditions this spring will likely lead to some prevent plant situations for farm producers.

Yellow seed hoppers being filled with pink-colored corn hybrid seeds.

Switching Corn Hybrid Maturities

The decision to change maturities is ultimately up to each individual producer and is based on unique situations such as risk tolerance and harvest capabilities, such as drying capacity.

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

2019 Alfalfa Weevil Activity Prediction

One of the major insect pests of alfalfa in South Dakota is the alfalfa weevil. In 2018, we received fewer reports of alfalfa weevils, which may have been a result of the cooler and wetter spring conditions. It’s possible that populations may also be lower in 2019 due to the similar spring conditions that we are currently experiencing.

Winter wheat blades with lesions with a dark brown center and yellow margin surrounding the lesion.

Diagnosing Early Diseases in Winter Wheat

Winter wheat progress is relatively behind the five-year average given the long winter season and low spring temperatures. However, it is important to scout and diagnose early-season diseases in winter wheat to determine the need for an early season fungicide.

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

How to Identify Common Stalk Borers and Thresholds

As corn is being planted, it is important to remember that there are insect pests capable of injuring young, vegetative corn. One such pest is the common stalk borer. Although common stalk borer outbreaks are sporadic, when present in high numbers they can cause significant yield loss.


2017-2018 Multi-State Organic Oat Variety Trial Results

The tight production margins currently present in agriculture have increased interest in growing organic oats.

A healthy, growing soybean field. Farmyard in the background.

Soybean Growers Sought for On-Farm Research Program

May 15, 2019

SDSU Extension and the South Dakota Soybean Research and Promotion Council are seeking South Dakota soybean growers to participate in a farmer-led On-Farm Research Program.

Soybean, Plant, Crop Management, Crop Treatments, Soil Fertility

grasshopper sitting on plant leaf

Grasshopper Mites in South Dakota

Fact sheet that covers the ectoparasite grasshopper mites.