Control of the brassica root flies (Delia radicum and D. floralis) in swedes and forage rape in northern Norway

brassica napus chlorfenvinphos clorfenvinfos crop yield delia floralis delia radicum diazinon emulsion emulsions granule granules insecticidas insecticide insecticides isofenfos isofenphos isophenphos lindane lindano noruega norway recubrimiento de semillas rendement des cultures rendimiento de cultivos residues residuos rutabaga rutabagas seed dressing traitement phytosanitaire semences