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Small reddish-orange beetles on a green sunflower bud with a larger grey beetle also present.

Identifying Red and Gray Sunflower Seed Weevils

When scouting sunflower, the most observed weevil is the red sunflower seed weevil. However, there are two species of seed weevils that can be present on sunflower heads in South Dakota.

Red-brown colored weevil with bent antennae originating on the elongated mouthparts.

It’s Time to Start Scouting for Red Sunflower Seed Weevils

In South Dakota, sunflower flowering is getting underway. That means it is time to start scouting fields for red sunflower seed weevils.

Diseased sunflower head, showing sclerotia bodies that have replaced seeds.

Sclerotinia Concerns in Sunflower

Sclerotinia diseases are a concern in sunflowers, because the fungus can infect the plant through the root, mid-stalk or the head. Wet weather and cool temperatures two-to-three weeks prior to and during flowering favor disease development.

Black Angus crossbred cow standing to the right looking at the camera with two cattle grazing in the background with blank area to the left

Drought Management Tips for Beef Cattle Producers

Fact sheet with tips for Beef Cattle Producers for Drought Management

Brown and green insect with clear wings that are folded over its body like a tent.

What’s Buzzing in the Trees?

Each summer we hear a droning buzz that comes from the trees. Many residents of South Dakota attribute this noise to locusts. But that isn’t what is making the buzzing sound! The insects responsible for the buzz are actually called cicadas

Gray beetle with long antennae that are alternating white and black pattern on green leaf petiole.

Will Dectes Stem Borers Be an Issue in 2020?

Every year, there is a risk that sunflower in South Dakota will be infested by Dectes stem borer larvae. At this point in the season, adults are active, and females have likely been laying eggs in sunflower plants.

Numerous grasshoppers feeding on a yellow sunflower head.

Watch Sunflowers for Grasshopper Defoliation and Flower Feeding

Grasshoppers continue to be an issue in some areas of South Dakota. The hotspots seem to be along the Missouri River, but it is a reminder that everyone should be monitoring their crops for grasshopper feeding.

Green corn plant with abnormal tassel growth.

Crazy Top Disease Developing in Corn

Crazy top disease was observed in a few fields in the Southeast counties in the state. This disease develops in corn that is flooded or under full water saturation when corn has not reached the four-to-five leaf stage.

Gray tear drop shaped bugs feeding on a yellow squash.

Squash Bugs Are Active and Ready to Kill Your Plants

Squash bugs are a headache for gardeners almost every year in South Dakota. As their name implies, squash bugs feed on squash along with many other cucurbits. Injury caused by extensive feeding appears as wilting and may result in the death of infested plants.

Tan-gray Goss’s bacterial blight lesions were observed in scouted corn fields.

Goss’s Bacterial Wilt and Blight Developing

While out scouting corn fields (the week of August 11, 2020) Goss’s bacterial wilt and blight was found starting to develop in a number of fields.