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Wireworm control from Signal seed treatment

‘Wireworm reduction’ has been added to the Signal (cypermethrin) seed treatment product label.

‘Wireworm reduction’ has been added to the Signal (cypermethrin) seed treatment product label.


The extended label permits the use of the product for the control of wireworm damage to wheat and barley.


As a treatment that’s already established as an effective defence against wheat bulb fly infestation, it’s appeal has now been extended where there is a threat of wireworm.


Wireworm, the larvae of click beetles (Elateridae), typically originate from grassland but are also capable of attacking a wide range of crops as soon as seeds are planted.


Nigel Riches, Certis Technical Officer, is encouraged by the new authorisation, noting the yield-depleting effects of wireworm, inhibiting healthy stand during the critical stages of crop establishment.


“Wireworm is an increasingly common pest in cereals,” he notes. “It’s frequently a result of set-a-side, encroachment from grass margins or due to poor control of grass weeds in previous crops. It is also a problem where cereals are part of a traditional grass ley rotation,” he adds.


“Wireworm has become a more serious pest since the withdrawal of organochlorine insecticides and since winter cropping has come to dominate production. Heavy infestations can cause yield loss of up to 0.6t/ha in Cereals.
“Signal delivers on a par with competitors whilst offering a low dust, operator friendly formulation,” says Nigel.


Signal is an emulsion seed treatment containing the insecticide cypermethrin for the reduction of wireworm (Agriotes lineatus) and promoting an improved plant stand. It is equally effective at reducing wheat bulb fly (Delia coarctata) damage on wheat and barley.