Weed of the Week: Giant Foxtail

Giant foxtail is a common summer annual grass in row crops and forages. It emerges for a long period in the spring. It typically begins emerging after the beginning of ragweed and lambsquarters emergence. Seeds emerge from shallow soil (1 inch or less) and plants produce between 500-1500 seeds. Herbicides […]

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Weed of the Week: Johnsongrass

Johnsongrass is a widespread perennial grass weed throughout the US, with herbicide resistant populations in the midwest, south, and mid-Atlantic. It spreads via rhizomes underground. Management: This information is based on Adam Davis and Bill Curran’s discussion of Johnsongrass management here. Managing perennial weeds that grow from both rhizomes and seeds, […]

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Tillage and residuals are powerful weapons against Palmer amaranth

Palmer amaranth requires a well-planned, integrated approach to management in order to keep it at bay and stop new plants from establishing. A recent multi-state study showed that tillage-based weed management programs are most powerful against Palmer when they combine a PRE residual herbicide program with deep tillage using a moldboard plow. […]

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Spring Weed Control in Grass Hay and Pasture

From Penn State Extension Field Crop News, April 12, 2017 If you were unable to control winter annuals and biennials last fall, there is still time now. However, the timing of herbicide application or mowing is critical and can make the difference between an effective tactic and a waste of […]

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Weed of the Week: Common ragweed

Common ragweed has already emerged in row crops and pastures around the country. Like most summer annual weeds, applying herbicide treatments now when they are still small will target them when they are most vulnerable and help ensure full control prior to planting. Herbicide resistant populations of common ragweed exist in many states, […]

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Weed of the Week: Barnyardgrass

Adapted from Barnyardgrass Management in the Mississippi Delta, Jason Bond, Mississippi State University Barnyardgrass is the most troublesome weed in Mississippi rice. Barnyardgrass that is allowed to survive and produce seed in soybean can cripple a rice weed control program the following year.  Fewer barnyardgrass escapes means less seed production, […]

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Weed of the Week: Horseweed (marestail)

Have you seen horseweed beginning to pop up with the recent spring weather? At this time of year, you could be seeing either spring-emerging horseweed or fall-germinated seedlings that are re-emerging for the spring. Now is the time to begin plans to till or use an herbicide burndown so that […]

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IWM tips for early-emerging kochia

Timely scouting and strategic crop rotation can help optimize kochia control as part of an integrated weed management program. Long stretches of warm temperatures in February have spurred kochia seedlings to start emerging in parts of the midwest including western Nebraska. Since control of kochia seedlings is best shortly after […]

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