racine (1) province (1) plantation (d'arbres) (1) agent pathogène (1) industrie (1) hygiène (1) récolte (1) équipement (1) maladie (1) investigation (1) contamination (1) Afrique (1) Control (1) Care and hygiene (1) Polymerase chain reaction (1) Weights and measures (1) Value (1) Tunnels (1) Surfaces (1) South Africa (1) Readers (Primary) (1) Powdery scab (1) Pathogenic microorganisms (1) Industries (1) Hygiene (1) Growing media (1) Sources (1) Sources (1) Planting (1) Detection (1)