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

Common Stalk Borer Activity Estimate: May 6, 2021

We are beginning to accumulate degree days a little faster for common stalk borers. Eggs will be hatching through much of the state, and we will continue to monitor activity as the season progresses.

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

Alfalfa Weevil Activity Prediction Update: April 8, 2021

As the temperatures begin to warm up around South Dakota, it is important to remember that some insect pests are accumulating degree days. One of the insect pests that we use degree day models to monitor is the alfalfa weevil.

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

2021 South Dakota Overwintering Bean Leaf Beetle Predicted Mortality

Bean leaf beetle emergence is approaching, and it’s important to start thinking about this pest. Once soybean begin emerging, overwintering adult beetle populations will move into soybean fields and begin feeding on seedlings.

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

Alfalfa Weevil Activity Prediction Update: April 15, 2021

Due to the cooler temperatures, we didn’t accumulate a lot of degree days for alfalfa weevils during the last week. However, there are some areas in South Dakota where alfalfa weevils may be active.

Dirt patch in the center of a pasture caused by white grub feeding

Do You Have True White Grubs in Your Pasture or Rangeland?

Grub damage to pastures and rangeland is often observed in South Dakota. From past observations, some of the heaviest infestations in the state are located near the Missouri River.

Adult twospotted spider mites crawling on webbing that is attached to a leaf.

Dry Conditions Could Lead to Early Twospotted Spider Mite Infestations

Although it isn’t an insect, the twospotted spider mite is an occasional pest of crops in South Dakota, and its populations can rapidly increase during dry conditions.

Tim Schreiner at his food preservation booth at the Vermillion Area Farmers Market.

Schreiner Turns Backyard Hobby Into Community Support

Whether volunteering as a Master Gardener or a Master Food Preserver, Tim Schreiner says the interaction with people and seeing that “light bulb” moment after a conversation is really the fun part of the programs.

Field with field peas and blue sky with fluffy white clouds

Production and Utilization of Field Peas in South Dakota

Guide to field pea production and utilization in South Dakota

A patch of soybeans with several plants exhibiting browning and yellowing leaves.

Plant Disease Management Decisions to Make Before Planting

For most plant diseases, in-season management choices are very limited. In fact, there are no in-season management options available for diseases caused by nematodes, viruses, and bacteria.

A soybean root with several small white cysts growing on it.

Scout and Soil Test for the Soybean Cyst Nematode 

Soybean cyst nematode (SCN) is the main soybean production constraint in South Dakota. Soybean plants can be infested with SCN but may not display visible symptoms.