The parasitoid complex of the leafminer Chromatomyia fuscula (Diptera: Agromyzidae) in spring barley

altitud altitude auxiliaire de lutte biologique biological control organisms braconidae cereal crops chalcididae chromatomyia fuscula chrysocharis cultivos de cereales diglyphus dormance dormancy eupelmidae farmland fauna faune feuille hibernation hojas host parasite relations insecte nuisible insecte utile latitud latitude leaves noruega norway parasite parasites pest insects pteromalidae terre agricole trampas traps useful insects vespidae viabilidad viability