TheEU suspension of Poncho (clothianidin) seed treatment on maize left growerswithout protection from wireworms but fortunately there is now an alternativeoption for 2014.
Followingthe suspension of imidacloprid products on maize in France, Bayer CropSciencedeveloped a thiacloprid-based seed treatment (Sonido) for the French marketwhich also allowed treated seed to be imported to the UK. Bayer has nowreceived approval for Sonido in the UK allowing seed to be treated locallygiving greater flexibility.
Itis now the only effective option that UK growers have for this damaging pestand has provided comparable control of wireworms to Poncho, says Peter Stacey,Seed Treatment Manager for Bayer CropScience UK. But he warns wireworm controlwill always be lower in difficult conditions especially where soils are coldand wet during the early growth phase. Growers should always ensure they waituntil conditions are favourable before planting crops. Sonido is also notrecommended for co-treatment with Mesurol (methiocarb) seed treatment soadditional protection from bird damage may be required
Sonidocan be used on maize seed intended for grain, silage or game cover at a maximumplanting rate of 2.2 unit/ha (45,000 seeds/acre).