Apple scab (Diapositiva) - Ithaca : Cornell University, (s.a.) - 6 diapositivas col. 2 x 2 plg. - Plant disease profiles ser. 1 ; 11 . - Plant disease profiles ser. 1 ; 11 . Tambien en CD 4 3/4 plgs. LCCN: 19344 Subjects--Topical Terms: Manzana--Enfermedades.Venturia inaequalis.