[Onion downy mildew (Peronospora destructor). Fungicides, resistance and thermotherapy [Norway]]

agentes nocivos agricultural chemicals agronomic characters alliaceae allium allium cepa antimicrobials antimicrobien application methods bactericidas biological control breeding breeding aims bulbous vegetables champignon crops cultivos disease resistance diseases drugs economic plants enfermedades fungosas escandinavia europa europe facteur nuisible fongicide fungi fungicidas fungicides hortalizas (plantas) hortalizas de bulbo injurious factors liliiflorae lutte biologique medicamentos methode methods mildews moho moisissure monocotyledons moulds mycose mycoses noruega norway objetivo de mejoramiento peronospora pest control methods pesticide pesticides plaguicidas plantas plante plante de culture plants produit agrochimique resistance to injurious factors resistencia a la enfermedad scandinavia scandinavie symptome symptoms tratamiento anterior a la siembra vegetable crops