Sphaceloma fawcettii var. scabiosa . [Descriptions of Fungi and Bacteria].

A description is provided for Sphaceloma fawcettii var. scabiosa . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Rough and sweet lemon, lime, grapefruit, sweet orange, mandarin and satsuma orange, citron ( Citrus medica), C. japonica and C. jambhiri . Sour orange somewhat resistant (McCleery, 1930) or immune (51, 2478). DISEASE: Tryon's scab or Australian citrus scab. GEOGRAPHICAL DISTRIBUTION: Australia (Queensland, New South Wales), S.W. Pacific (New Guinea, New Caledonia (41, 85), Fiji, British Solomon Islands); probably New Zealand (Jenkins, 34, 516), S.E. Asia (Malaysia, Hong Kong, Sri Lanka), Africa (Malagasy Republic and Comores Islands (51, 2478), Malawi, Rhodesia and Zambia); South America (Argentina (33, 292)). (From literature cited and specimens in Herb. IMI: CMI Map 161, ed. 2, 1966.) TRANSMISSION: Presumably by wind and rain splash as in common citrus scab (CMI Descript. 438) infection arising at start of season from lesions on old fruits and twigs (McCleery, 1930).