Content by Philip Rozeboom
Now is Time to Plan Your Weed Management Strategy for the 2025 Growing Season
As harvest season comes to an end, now is the time to start formulating your weed management plan for next year. Learn some expert tips for getting your operation off to a good start next growing season.
Current State of Row Crop Weed Management in South Dakota
Results of an online survey to determine how South Dakota stakeholders are currently managing row crop weeds.
Another Revisitation of Using 2,4-D and Dicamba for Corn Weed Management: Application timing and rates matter
While doing some final weed control ratings this season, ears were pulled from plants in plots treated with 2,4-D, dicamba, and a standard Group 27 herbicide program pre-and-postemergence. Learn what impacts these herbicides had on the ear's size and appearance.
Perennial Weed Management in the Fall
Most herbicide applications to manage perennial weeds have already occurred. However, now is the time to consider fall applications for weeds that were not treated or escaped the spring application.
Fall-Applied Residual Herbicides
Many parts of South Dakota can experience dry conditions when residual herbicides are applied, resulting in inadequate weed control. In these areas, residual herbicides can be applied in the fall and take advantage of a longer period to receive activating precipitation.
Sunflower Moths Causing Problems
While scouting late-planted sunflowers two weeks ago, there were increased observations of sunflower moth caterpillars in the heads that were later than the rest of the field. Sunflower moths are best managed as moths or early instar larvae.
Yellow Toadflax Has Not Flowered in Some Parts of South Dakota
Yellow toadflax is a difficult-to-manage weed that infests pastures and rangeland. In contrast with other weeds, yellow toadflax should be sprayed when flowers are present for more-effective management.
Cheap and Simple Soybean Herbicide Programs Do Not Pencil Out
While simple, one-herbicide programs are initially easy on the budget, it is important to consider indirect costs of surviving resistant weeds that reduce soybean yield and produce seed that will have to be managed later.
Management Recommendations for Soybean Aphids
In many fields across eastern South Dakota soybean aphid populations have reached economic thresholds, and there have been a lot of questions regarding the best approach to managing the 2024 outbreak.
Sunflower Moths Observed in South Dakota
Sunflower moths have been observed in South Dakota sunflower fields this week. Sunflower heads are most susceptible to damage caused by the sunflower moth caterpillars from the onset of flowering to when the ray petals begin drying.