Ascochyta heveae. [Descriptions of Fungi and Bacteria].

Author(s):  
E. Punithalingam

Abstract A description is provided for Ascochyta heveae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Hevea brasiliensis. DISEASE: Marginal leaf scorch or rim blight of rubber leaves (Hevea brasiliensis). Early symptoms on mature leaves are groups of minute, yellowish spots merging with one another as they develop forming dry brown or greyish patches with a paler centre and a purplish brown border. Dry spots extend from the leaf margin inwards towards the midrib between the veins finally coalescing with one another so that the leaf is edged with a discoloured zone all the way round (Petch, 1921). GEOGRAPHICAL DISTRIBUTION: Africa (Zaire); Asia (Malaysia, Malaya, Sarawak, Sri Lanka). TRANSMISSION: No studies reported; conidia presumably dispersed by water splash.

Author(s):  

Abstract A new distribution map is provided for Ganoderma philippii (Bres. & P. Henn.) Bres. Hosts: Rubber (Hevea brasiliensis), tea (Camellia sinensis), coffee (Coffea) etc. Information is given on the geographical distribution in AFRICA, Central African Republic, Congo, Gabon, Ivory Coast, Nigeria, Zaire, ASIA, Burma, India (S.), Indonesia (Java), (Sumatra), Peninsular Malaysia, (Sabah), (Sarawak), Sri Lanka, Vietnam, AUSTRALASIA & OCEANIA, New Caledonia, Papua New Guinea.


Author(s):  
J. F. Bradbury

Abstract A description is provided for Curtobacterium flaccumfaciens pv. poinsettiae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Euphorbia pulcherrima. DISEASE: Bacterial canker of poinsettia. The early symptoms are usually watersoaked streaks on green stems. These may extend into petioles and leaves giving spots, blotches or defoliation, and downwards into the woody stem where it produces yellowing of the cortex and browning of vascular tissue. Golden brown bacterial ooze may be seen on ruptured stems and on leaf lesions. The disease is systemic and cuttings from infected stock plants may develop poorly or not at all. GEOGRAPHICAL DISTRIBUTION: New Zealand (N. Island), USA (Florida, New Jersey, New York, MD, Pennsylvania; also Alabama (40: 310)); possibly UK (isolated in 1984, but still regarded as non-indigenous) (IMI Distribution Map 550, ed. 1, 1982). TRANSMISSION: This disease is spread in infected cuttings and probably by water splash as infection can be artificially induced by spray inoculation without wounding (41: 604).


Author(s):  
J. E M. Mordue

Abstract A description is provided for Pericladium grewiae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Grewia spp., including G. columnaris, G. hirsuta, G. mollis, G. orbiculata, G. retusifolia, G. villosa; G. rotundifolia and G. tiliaefolia (as P. tiliacearum); G. flavescens (as P. flavesci). DISEASE: Stem smut of Grewia. Infection frequently results in the production of conspicuous witches' brooms. GEOGRAPHICAL DISTRIBUTION: Africa: Angola, Ethiopia. Asia: India (including Mysore, the north-western Himalaya, Rajasthan, south India), Sri Lanka. Australasia: Australia. TRANSMISSION: Ustilospores are presumably disseminated by air currents and water-splash. Young and mature plants are both susceptible (Josh, 1957), but no detailed studies have been reported.


Author(s):  

Abstract A new distribution map is provided for Rosellinia arcuata Petch. Hosts: Tea (Camellia surensis), Rubber (Hevea brasiliensis), Coffee (Coffea spp.) etc. Information is given on the geographical distribution in AFRICA, Central African Republic, Ghana, Nigeria, Uganda, Zaire, ASIA, India, Hong Kong, Indonesia (Java, Sumatra), Sri Lanka, AUSTRALASIA, Papua & New Guinea.


Author(s):  

Abstract A new distribution map is provided for Ganoderma philippii (Bres. & Henn.) Bres. Hosts: Rubber (Hevea brasiliensis), tea (Camellia sinensis), coffee (Coffea) etc. Information is given on the geographical distribution in Africa, Central African Republic, Congo, Gabon, Ivory Coast, Nigeria, Zaire, Asia, Bangladesh, Burma, China, Guangdong, India, Indonesia, Java, Sumatra, Malaysia, Sabah, Sarawak, Peninsular, Sri Lanka, Vietnam, Australasia & Oceania, New Caledonia, Papua New Guinea, South America, Brazil, Bahai, Amazonas.


Author(s):  

Abstract A new distribution map is provided for Phytophthora meadii McRae. Hosts: Rubber (Hevea brasiliensis) and others. Information is given on the geographical distribution in ASIA, Burma, China, India (S.), Peninsular Malaysia, Sri Lanka, Thailand, Vietnam, AUSTRALASIA & OCEANIA, Australia, Hawaii.


Author(s):  

Abstract A new distribution map is provided for Oidium heveae Steinm. Hosts: Rubber (Hevea brasiliensis). Information is given on the geographical distribution in AFRICA, Malawi, Tanzania, Uganda, Zaire, ASIA, Brunei, Burma, Cambodia, India (S) Indonesia, Peninsular Malaysia, (Sarawak), Sri Lanka, Thailand, Vietnam, AUSTRALASIA & OCEANIA, Papua New Guinea, SOUTH AMERICA, Brazil (Sao Paulo).


Author(s):  
E. Punithalingam

Abstract A description is provided for Septoria carthami. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Carthamus tinctorius and C. mareoticus. DISEASE: White leaf spot of safflower. Early symptoms appear as small distinct brownish lesions which enlarge and become circular or irregular and up to 6 mm wide. As the disease progresses lesions sometimes coalesce to form large blotches. Older lesions are usually bordered by dark brick margins with ash grey centres. GEOGRAPHICAL DISTRIBUTION: Africa (Egypt); Asia (Iraq, Turkey, USSR, West Siberia); Europe (Bulgaria, Rumania); North America (USA, Indiana, Texas). TRANSMISSION: It has been claimed that the fungus was introduced into West Siberia with infected seeds (14, 493-494). Also the fungus is probably disseminated by water-splash or by mechanical means.


Author(s):  

Abstract A new distribution map is provided for Oidium heveae Steinm. Hosts: Rubber (Hevea brasiliensis). Information is given on the geographical distribution in Africa, Congo, Malawi, Tanzania, Uganda, Zaire, Asia, Brunei, Burma, Cambodia, China, India, Indonesia, Malaysia, Sarawak, Sabah, Sri Lanka, Thailand, Vietnam, Australasia & Oceania, Papua New Guinea, South America, Brazil, Sao Paulo.


Author(s):  
E. Punithalingam

Abstract A description is provided for Phomopsis mangiferae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Mangifera indica (mango) (Anacardiaceae). DISEASE: Post-harvest decay and stem end rot. GEOGRAPHICAL DISTRIBUTION: Africa (Mauritius, Senegal, Seychelles, Zambia); Asia (Bhutan, Brunei, India, Malaysia (Sabah), Nepal, Pakistan, Sri Lanka); Australasia & Oceania (Australia: Queensland, Western Australia; (French Polynesia) Moorea); Central America and West Indies (Cuba, Dominica, Trinidad & Tobago). TRANSMISSION: Presumably by conidia dispersed by water splash during wet or humid conditions.


Sign in / Sign up

Export Citation Format

Share Document