Phytophthora porri. [Distribution map].

A new distribution map is provided for Phytophthora porri Foister. Hosts: Leek (Allium ameloprasum var. porrum) and other hosts. Information is given on the geographical distribution in Africa, South Africa, Asia, Japan, Australasia & Oceania, Australia, New South Wales, South Australia, Europe, Greece, Netherlands, Norway, Switzerland, UK, North America, Canada, Alberta.

Phytophthora porri. [Distribution map].

A new distribution map is provided for Phytophthora porri Foister. Hosts: Leek (Allium porrum) and other hosts. Information is given on the geographical distribution in ASIA, Japan, EUROPE, Britain & Northern Ireland, Greece, Irish Republic, Netherlands, Norway, Switzerland.

Phytophthora porri. [Descriptions of Fungi and Bacteria].

A description is provided for Phytophthora porri. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Allium spp. (leek, onion, scallion), cabbage, Campanulapersicifolia, tulip. DISEASE: White tip of leek; onion white leaf spot; storage rot of white cabbage; crown rot of Campanula. GEOGRAPHICAL DISTRIBUTION: Europe (UK, Netherlands, Switzerland, Norway); Asia (Japan). (CMI Map 204, ed. 2, 1967). TRANSMISSION: Suggested by wind-blown sporangia from the soil surface to leek leaves (11, 151). Sporangia were found in soil round diseased Campanula plants (31, 65). Tulip bulbs were invaded through the young bud but not through the scale leaf (54, 2855). Cut stems of cabbages were infected from the soil at harvest by soil splash or from the cutting knife (52, 266; 56, 899).