![]() For best herbicide activity wait until daytime air temperatures is greater than 50 F for two to three consecutive days. 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. However, legumes such as clovers interseeded with grass pastures can be severely injured or killed by these herbicide products. PastureGard, Crossbow), or metsulfuron (eg. ![]() Depending on other weeds present products that contain dicamba+2,4-D (eg. 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.įor chemical control, herbicides registered for use on grass pastures that contain 2,4-D will effectively control buttercup. Whereas, livestock animals allowed to overgraze fields during the fall and winter months is one of the main factors that contribute to buttercup problems. 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. Most buttercup plants emerge from seed during the fall or late winter months. This is one reason buttercups can survive year to year and new plants emerge each year. Waiting until after flowers appear can be too late to implement control tactics. ![]() New seed are produced during the time petals are showy. Although each of these plants may have somewhat similar flower heads, each of these buttercup species differs somewhat in their vegetative leaf characteristics. There are four different species of buttercups that may be found in Kentucky: bulbous buttercup (Ranunculus bulbosus), creeping buttercup (Ranunculus repens), tall buttercup (Ranunculus acris), and small flower buttercup (Ranunculus arbortivus). Plants typically produce five, shiny yellow petals in the early spring. In fact, many fields that have dense buttercup populations are fields heavily grazed by animals during the fall through the early spring months.īuttercups are sometimes classified as short-lived perennials, but often grow as winter annuals. As a cool season weed, this plant often flourishes in over grazed pasture fields with poor stands of desirable forages. Green, Extension Weed Scientist - 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. The use of reasonable rates of glyphosate to assist with killing the old pasture will help prevent this from happening, and MCPB or flumetsulam in the new pastures will kill off seedlings before they get too established and set up the next population of creeping buttercup.Dr. ![]() In recent research conducted at Massey University, we found that simply ploughing a paddock with no use of herbicide to regrass a paddock does not kill this species very well at all. Even after secondary cultivation to prepare a good seed bed, buttercup leaves are often the first foliage that pop up in the new pasture from old stolons that haven’t died, and creeping buttercup will be worse in a new pasture than the former pasture following regrassing without herbicide assistance. In pastures, either MCPA or flumetsulam can be used to remove it, and most turf herbicides kill it successfully in lawns, especially those based on MCPA. Rates of glufosinate or glyphosate that are not too low can give reasonable control in orchards, as can residual herbicides based around diuron. Its growth form makes it tolerant of mowing too, so it grows in the mown grass strips between rows of trees, and grows laterally into the sprayed strip, as does white clover. Creeping buttercup is commonly found in the herbicide strips of orchards and in waste places because it is tolerant of amitrole, simazine and low rates of glyphosate, all chemicals commonly used in orchards and waste places. ![]()
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