Docks are taking advantage of current warm conditions and springing into active growth in silage leys across much of the UK says David Roberts, grassland specialist with Dow AgroSciences.
Spray docks when the plant is dinner-plate size for best results.
“Docks roots can extend down into the soil many metres and reach water that grass roots can’t, giving them a head start. The higher than normal temperatures and sunshine of the past week have also stimulated weed growth which is much earlier than the past two years.
“Where a dock grows, grass doesn’t – so a 10% infestation will reduce grass yield by a corresponding amount, explains Mr Roberts.
“Where docks are present in fields shut up for silage, a broad-acre spray using a translocated herbicide containing triclopyr like Doxstar, which is completely safe to grass, applied at least three weeks before cutting will be cost-effective. Spraying when the new dock growth is ‘dinner-plate’ size will achieve the best results.”
Chickweed in new-sown leys
Other weeds are also growing quickly, including chickweed which is germinating now in new leys sown last autumn.
Quick to colonise any bare patches in gappy swards, it can soon outcompete perennial ryegrass for moisture, space and nutrients. Herbicides such as Doxstar and Pastor give good control against chickweed and will not harm the grass even when it is very young.
New Vistive Contracts Offer ‘Best Ever’ Speciality OSR Growing Opportunity
Near-Record Wheat Production Expected This Year
Wild Oat Reports Prompt Control Guidance