Content by Adam Varenhorst
Alfalfa Weevil Activity Prediction Update: June 5, 2024
Although the degree day estimates suggest that alfalfa weevils are no longer active in the fields and should be pupating, scouting has indicated otherwise.
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.
Alfalfa Weevil Activity Prediction Update: May 29, 2024
Most alfalfa weevil larvae that were observed this week were between the first and second instar, but it is likely that later instars are present in southern counties.
Common Stalk Borer Activity Estimate: May 24, 2024
Throughout South Dakota, common stalk borer caterpillars are still active in alternative weed and grass hosts.
Alfalfa Weevil Activity Prediction Update: May 16, 2024
South Dakota finally warmed up and as a result, alfalfa across the state should be scouted for alfalfa weevil larvae.
Current State of Noxious Weed Management in South Dakota
Results of an online survey to determine how South Dakota stakeholders are currently managing noxious weeds.
Alfalfa Weevil Activity Prediction Update: May 9, 2024
Although May hasn’t been extremely warm, the accumulated degree days in South Dakota since January 1, 2024, suggest that alfalfa weevil larvae could be active in several areas of the state.
I heard cicadas are having a big year. Are they coming to South Dakota?
Cicadas are making headlines—specifically the periodical cicadas in Brood XIII and Brood XIX. Both both broods are in the Midwest and are geographically close together. Find out where you can expect to see them this spring.
South Dakota Grasshopper Prediction for 2024
In 2024, grasshoppers are likely to cause problems in areas of South Dakota due to large populations that were present in 2023 and the relatively late first hard freeze date observed in much of the state.
Keep an Eye on Black Grass Bugs This Spring
In South Dakota, black grass bugs are a common spring pest of forage grasses. This native insect first appears in late April and May when grasses emerge from dormancy.