Content by Philip Rozeboom
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Although the degree day estimates suggest that alfalfa weevils are no longer active in the fields and should be pupating, scouting has indicated otherwise.
Considerations of Corn Postemergence Herbicides
Managing weeds after emergence is important to protect the yield potential of corn crops. Learn some important application considerations before selecting a postemergence herbicide.
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.
Critical Period of Weed Control: A good, but not perfect guideline
The critical period of weed control is the period during a crop lifecycle when weeds need to be managed to avoid a significant yield loss.
Leafy Spurge or an Imposter?
Leafy spurge is a statewide noxious weed that can be difficult to manage. However, are the recent yellow flowers appearing throughout South Dakota landscapes leafy spurge or another species?
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.
Weeds Are Starting to Emerge: Even After a Preemergence Herbicide Application
During recent scouting, weeds were noticed in plots treated with preemergence herbicides. Learn some troubleshooting considerations to help determine why some weeds emerge following preemergence treatments.
Common Stalk Borer Activity Estimate: May 24, 2024
Throughout South Dakota, common stalk borer caterpillars are still active in alternative weed and grass hosts.
Absinth Wormwood Control in the Spring
Absinth wormwood is a difficult-to-control, noxious weed that can produce great amounts of seed (50,000 seeds per-stem) and spreads only by seed, illustrating the importance of management prior to seed production.
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.