Abstract
Abstract A description is provided for Alternaria radicina . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Daucus carota, Apium graveolens, Petroselinum crispum, Pastinaca sativa, Anethum graveolens . DISEASE: Black rot of carrot ( Daucus carota ); also attacks celery ( Apium graveolens ), parsley ( Petroselinum crispum ), parsnip ( Pastinaca sativa ) and dill ( Anethum graveolens ) (15: 275; 30: 140). Causes pre- emergence and post-emergence damping-off; primary lesions of older plants begin at the base of the petiole from where a dark, usually shallow, lesion spreads into the crown and sides of the root. Secondary lesions develop below ground and are often coincident with cracks and splits. A dry, mealy rot may develop in storage. Necrotic lesions occur on the inflorescence and occasionally on the older leaves but the leaf blight is probably not as severe as that caused by A. dauci (Kuhn) Groves & Skolko. GEOGRAPHICAL DISTRIBUTION: Africa (Nigeria), Americas (Argentina, Canada, USA), Asia (India, Israel, Japan), Australia and Europe (Britain, Bulgaria, Czechoslovakia, Denmark, Finland France, Germany, Hungary, Italy, Netherlands, Norway, Rumania, Sweden, USSR). TRANSMISSION: Seed-borne and soil-borne (12: 72; 22: 339; 26: 405; 44, 948; 46, 1160); persists in the soil for up to 6 yr (47, 3299i; 49, 3555d).
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