The Richmond Register

Lifestyles & Community

February 26, 2014

Buttercups in grazed pastures

RICHMOND — One of the signs that spring has arrived is when the yellow flowers of buttercup begin to appear, but it’s during the winter months that the vegetative growth of buttercup takes place.

As a cool season weed, this plant often flourishes in overgrazed pasture fields with poor stands of desirable forages. In fact, many fields that have dense buttercup populations are fields heavily grazed by animals during the fall through the early spring months.

Buttercups are sometimes classified as short-lived perennials but often grow as winter annuals. Plants typically produce five, shiny yellow petals in the early spring. New seeds are produced during the time petals are showy.

Waiting until after flowers appear can be too late to implement control tactics. This is one reason buttercups can survive year to year with new plants emerging annually.

Most buttercup plants emerge from seed during the fall or late winter months. Therefore, pasture management practices that improve and promote growth of desirable plants during these months is one of the best methods to help compete against the emergence and growth of this plant.

Whereas livestock animals allowed to overgraze fields during the fall and winter months is one of the main factors that contribute to buttercup problems. Mowing fields or clipping plants close to the ground in the early spring before buttercup plants can produce flowers may help reduce the amount of new seed produced, but mowing alone will not totally eliminate seed production.

For chemical control, herbicides registered for use on grass pastures that contain 2,4-D will effectively control buttercup. Depending on other weeds present products that contain dicamba+2,4-D (eg. Weedmaster), aminopyralid (eg. ForeFront, Milestone), triclopyr (eg. PastureGard, Crossbow), or metsulfuron (eg. Cimarron) can also be used.

However, legumes such as clovers interseeded with grass pastures can be severely injured or killed by these herbicide products. For optimum results apply a herbicide in the early spring (February- March) before flowers are observed, when buttercup plants are still small and actively growing.

For best herbicide activity, wait until the daytime air temperature is greater than 50 F for two to three consecutive days. Consult the herbicide label for further information on grazing restrictions, precautions or other possible limitations.

For fields heavily infested with buttercup a variety of control tactics may be needed. Apply a herbicide to help reduce the population of buttercup plants in the spring plus use good pasture management techniques throughout the year to help improve and thicken the stand of desirable forages. (Source: Dr. J.D. Green, UK Extension Weed Scientist)

Educational programs of the Cooperative Extension Service serve all people regardless of race, color, sex, religion, disability or national origin.

 

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