Phoma pinodella. [Descriptions of Fungi and Bacteria].
Abstract A description is provided for Phoma pinodella. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: A pathogen contributory to causing (spring/summer) black stem of legumes (mainly Pisum and Trifolium), involving foot rot, leaf spots and stem lesions. Also opportunistically pathogenic on many other host plants. HOSTS: On leaves, stems, roots and seeds of a wide range of plants and other substrata. The main hosts are Pisum (pea) and Trifolium (clover) but also recorded on other Papilionaceae including Arachis, Cicer, Glycine, Lathyrus, Lens, Lupinus, Medicago, Phaseolus, Vicia and Vigna. Non-leguminous host plants include Beta, Casuarina, Coffea, Galanthus, Gossypium, Hordeum, Lactuca, Oryza, Petroselinum, Phlox, Triticum and Zinnia. Also reported from soil, hay and straw; however, many records require verification. GEOGRAPHICAL DISTRIBUTION: AFRICA: Nigeria, Tanzania. NORTH AMERICA: Canada, USA. SOUTH AMERICA: Argentina, Chile. ASIA: Bangladesh, India, Iraq, Syria. AUSTRALASIA: Australia, New Zealand. EUROPE: Denmark, Germany, Great Britain, Ireland, Netherlands, Poland, Russian Federation, Sweden. Widespread, particularly in temperate regions. Thought to be of American origin (BOEREMA et al., 1993). TRANSMISSION: Plants are infected from seed or by rainsplash-dispersed conidia or from persistent fungal inoculum present on plant debris in the soil. The recent report of a teleomorphic state for this fungus raises the possibility that wind dispersal may also be involved (BOWEN et al., 1997). Cool, moist conditions favour infection but it is suppressed by warm weather.