Polygonum warning
16 February 2001
Polygonum warning
HARD frosts and open canopies could prompt unusually high numbers of polygonum weeds in winter cereals this spring, warns Du Ponts Martyn Rogers.
"If you rush in with broad-leaved weed control too early you could miss a late flush coming through." Added to that some spring herbicides such as Ally are very weak on weeds such as black bindweed. Harmony M is a much better bet, he says.
Procams Dr Ellerton echoes his warning. "These weeds can be extremely competitive and cause major problems at harvest. You have to be aware of them." *
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