![]() ![]() Red sorrel, smooth dock and curly dock are three cool-season plants that are in the same family and are collectively called sour dock by producers in Oklahoma. Herbicide applications that work well on buttercups include fall applications of Grazon P+D or early spring applications of Grazon, Cimarron max or Cimarron. These plants are a lot easier to control during these time periods. They are extremely difficult to control when they are in the flowering stage and producers who have observed them growing in their fields this past spring should consider a late fall herbicide application or a February or March herbicide application. There are several species of buttercups, but all of them tend to emerge in the fall and over winter as low-growing plants that send up a stems and flower in late spring. Our best advice at that time is to mow or spray these plants to keep them from going to seed and then treat those pastures the following fall or spring with an herbicide when they are easier to control.īuttercups are a problem in cool-season grass pastures and easily recognized in early spring by their bright yellow flowers. Usually, when we receive the call, the plants are already at the flowering stage and are expensive and difficult to control. The leaves contain the highest concentration of this harmful compound.It’s time to consider fall weed control applications on pastures that may have become infested with species such as musk thistle, buttercup, red sorrel and curly dock.Įvery spring, we in the Extension Service receive calls from livestock producers asking us how to get rid of these weeds. Ingestion leads to nausea, vomiting, dizziness, spasms, and potential paralysis. Warning: creeping buttercup and many other members of the Ranunculaceae family contain the chemical protoanemonin which is a severe skin irritant which induces rashes, blistering, and swelling in contacted areas. Meadow buttercup occupies a similar environmental niche as the creeping buttercup and the two species often overlap in their habitat and range. Meadow buttercup ( Ranunculus acris) is a another introduced, hairy, large-flowered perennial which can be distinguished by its taller stems and lack of stolons (runners). This plant was introduced to BC from Eurasia, and is now found all across North America save for the most extreme environments. It is very common at low elevations in BC where humans have settled, and is often regarded as an invasive noxious weed. Ranunculus repens inhabits moist recently disturbed sites such as ditches, clearings, fields, pastures, and gardens. Flowers usually have five petals (although have been observed with six to ten) and are 10-35 mm wide. Distinctive shiny butter-yellow flowers crown the stems. ![]() The stems support pale-spotted dark-green leaves which are toothed, lobed, and generally triangular in shape. Several flowering stems spring up from the central rooted nodes and creep outwards. Stalks grow from rooting stolons (runners) which can be up to 100 cm long. Creeping buttercup is a hairy perennial which grows to about 15 cm tall from its fibrous roots to the tips of its flowering stalks. ![]()
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