... • Herbicides kill the weeds, but may kill your legumes too . o Modelling the effects of a mycoherbicide with a hypothetical 50% kill of giant buttercup suggests that profitability improves by $485/ha. Once you have tried all the steps above to kill buttercup weeds, and only if they are still persistent, it is time to consider chemical warfare. NZ research shows mowing Californian thistle at specific times of the year is a great way to kill it off. This rate of 2,4-D will kill all red clover, but will do minimal damage to established white clover. Lower the acidity of soil, increase percolation and fertilize for cultural buttercup control. Do not seed clover for six weeks after herbicide application. Mow your thistles. To get rid of buttercups in your pasture or hayfield is a two step process; spray to kill the existing buttercups and improve the conditions that favor grass production. buttercup, chickweed, henbit, purple deadnettle and cressleaf groundsel. It is a non-residual herbicide for non-selective control of most annual and perennial weeds and a wide range of brush weeds in agriculture, horticulture, forestry and industrial areas. Controls Wide range of weeds in new and mature pasture. Controls most species of thistles, buttercup and many other flatweeds in pasture. Donaghys Grunt 600 Glyphosate is the strongest fully surfactant loaded glyphosate in the world. They can tolerate wet soil conditions better than many other species, including perennial ryegrass and white clover, allowing buttercups to out-compete more desirable species. Giant Buttercup Botanical name: Ranunculus acris Family name: Ranunculaceae Overview. Giant buttercup is not as common as creeping buttercup but is the most aggressive of the buttercups found in New Zealand. 4. Controlling buttercup and other pasture weeds Timing is the key University of Tennessee Extension forage specialists say timing is key to pasture management. For annual species such as hairy buttercup a herbicide application is best made from late autumn to late winter. 20L 200L Baton® Sprinter® Ammo®Max Synergy ™ 2,4-D Ester 680 Active ingredient: 680 g/litre 2,4-D as the ethylhexyl ester in the form of an emulsifiable concentrate. 4. Henbit. ... agreement with Dairy NZ, ... Utilise the extra pasture production when there is no giant buttercup in the pasture. 20L 200L It does not pay to rely solely on herbicides to control pasture weeds. Harmony ® 50SG is a soluble granule to be mixed with water and applied as a foliar spray for control of buttercups and docks in pasture and cereals. This will mean you’d need a contractor to come in to cultivate and later undersow pasture seed (undersowing is vastly superior to over-sowing). It can also be used for conservation tillage. Maintain the same cow numbers but feed them more to maximise efficiency. For selective control of Buttercup in grassy conditions such as pastures and hayfields, use the herbicide MCP Amine plus an adjuvant (wetting agent) such as Class Act. Hedge mustard (Sisymbrium officinale) is a widespread common annual herb, found throughout New Zealand in pasture, cultivated land, gardens and road-sides. Buttercup can tolerate wet soil conditions better than many other species, so buttercup out competes the grasses, and creeping buttercup in particular spreads rapidly. Non Volatile – Low Odour. Best results are obtained in the spring when weeds are actively growing within a vigorous, competitive pasture or … Kill Buttercup Weeds Chemically. Buttercups tend to be a problem in moist dairy pastures. Buttercup likes nutrient poor, compact soil with a low pH. It grows in a rosette Read more Read less. 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. 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