By Scout Nelson
Leafy spurge has started growing rapidly in South Dakota. Without proper control, it can lower the quality of pasture and rangeland, pushing out useful plants and wildlife. Early action is key to managing its spread.
Shows that leafy spurge has germinated and is in early growth stages. Some plants are beginning to show yellow bracts—modified leaves near flowers. This is a key stage, as yellow bracts signal that flowering and seed production will happen soon. It is also the best time to apply herbicides for better results.
Livestock can graze leafy spurge in early stages to slow growth. Mowing is another method that works if done regularly. Both help reduce the plant’s spread and seed production.
Leafy spurge beetles are also useful for control, especially in areas hard to reach or near sensitive land like rivers. These beetles feed on the plants and can be purchased for release. Naturally existing beetles may also be present. Regular scouting helps track their impact.
Herbicides remain the most effective control method if used alone. Applying them in spring can provide season-long control. In some cases, a second application in fall may be needed. Always check the latest Weed Control: Pasture and Range guide for suitable herbicide options.
Photo Credit: visionphotodisc-photo
Categories: South Dakota, General