| backward crops = culture en retard de végétation |
| bactericide = bactéricide |
| bait = appât |
| band application = traitement localisé |
| barley yellow dwarf virus = jaunisse nanisante de l'orge |
| barley = orge |
| barley org = orge |
| barn = grange |
| barnyardgrass = panic pied de coq |
| barrier cream = crème protectrice |
| bean = haricot |
| beans = fèves, féveroles |
| behaviour trials = essais de comportement |
| belt = courroie |
| bentgrass = agrostide |
| bin = cellule (stockage) |
| bindweed = liseron |
| bioassay = test biologique |
| bioassay indicator = indicateur biologique |
| biological activity = efficacité biologique |
| biological control = lutte biologique |
| biological damage treshold = seuil de nuisibilité biologique |
| biological rules = lois de la biologie |
| biomass = biomasse |
| black nightshade = morelle noire |
| blackgrass = vulpin |
| blight = mildiou |
| boom = rampe de traitement |
| boot stage = montaison |
| booting = gonflement |
| brash = petites terres à cailloux |
| brassicas = crucifères |
| break crop = tête d'assolement |
| breakthrough = découverte |
| broadleaf (ves) = dicotylédones, dicots |
| broadleaved (weeds) = dicotylédones, dicots |
| broom spray = jet filé |
| bucket = godet |
| bucket elevator = élévateur à godet |
| buffer stage = stade buttoir |
| buttercup = renoncule |
| bedstraw = gaillet |
| black bindweed = renouée des oiseaux |
| to break up clods = casser les mottes |
| to broadcast = semer à la volée |
| to bury = enfouir, enterrer |
