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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Flowering pigweeds…in the spring?

Have you ever seen pigweed flowering in the spring? In Corpus Christi, Texas, Texas A&M weed scientists observed mature seeds on Palmer amaranth by mid-March this year. This was followed by the the first siting of flower heads on Palmer plants on April 6 in College Station. Published on April […]

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Weed of the Week: Canada Thistle

Canada thistle is a common perennial weed in both conventional and organic cropping systems. It begins sprouting in mid-April to early May in the northern US, flowering mid-June to early July. It becomes difficult to control once it produces taproots and rhizomes, because 1) it spreads and reproduces via these […]

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