Producers may need to tackle dock infestations in silage fields during the next few weeks, as the early spring led to first cuts being taken before these tough perennial weeds could be treated.
Where docks are present, weed control incurs a relatively small cost relative to the gain in extra grass and silage produced.
“After 2018’s forage shortage, it is understandable that producers were keen to get started on their silage. But this gave little opportunity for any weed control early on,” says Corteva Agriscience’s Nicola Perry.
“But it is not too late,” she adds. “Spraying with a modern translocated herbicide, like DoxtarPro, two to three weeks after first cut, will catch the weeds with rosettes of fresh green leaves and when they are all of a similar dinner-plate size. This will ensure good spray coverage.
“There will also be less grass growth around the weeds, so it will be easier to hit the target plants when spraying.”
DoxstarPro should be applied at a rate of two litres per hectare, in between 300 and 400 litres of water, unless low drift nozzles are used. In this instance, water rates can be reduced to 200 litres per hectare.