[West Flemish trials with industrial vegetables. Report 1991 [control of diseases and pests [Phytophthora infestans, phenology of Delia radicum, Mamestra brassicae, Mamestra oleracea, Plutella xylostella, Peronospora tabacina]]]

allium ascalonicum allium cepa apio-nabo belgique belgium cauliflowers celeriac chou fleur coliflor control de enfermedades courge cucumis sativus cultivation cultivo disease control endibia endives ensayos de variedades foeniculum vulgare insecte phyllophage insectos depredadores de las hojas lactuca sativa leaf eating insects mamestra marrows nicotiana tabacum papa peronospora pest control methods phytophthora plutella xylostella pomme de terre potatoes pratique culturale spinacia oleracea variety trials