Abstract
A description is provided for Leptosphaeria coniothyrium. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Rosa and Rubus spp. and a wide range of hosts which it attacks as a wound parasite or saprophyte. DISEASES: Cane blight of raspberry, boysenberry, blackberry (43, 798; 56, 753; 56, 5722); graft canker of roses (49, 3349). GEOGRAPHICAL DISTRIBUTION: Africa, Asia, Australasia & Oceania, Europe, North and South America, Central America and West Indies (CMI Map 185, ed. 3, 1978). New records not mapped are: Africa (Egypt, Ethiopia, Mauritius, Sierra Leone, Sudan, Zambia); Asia (Bangladesh, Burma, Israel, Singapore, Sri Lanka, Turkey); South America (Venezuela). TRANSMISSION: By air, soil and waterborne-conidia (28, 340). Infection through wounds caused by mechanical injury, pruning or hailstones (39, 426; 52, 1753g; 56, 5721; 57, 4554).