Pseudomonas oryzicola. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
Oryza Sativa ◽  
Geographical Distribution ◽  
Brown Spot ◽  
Windy Weather

Abstract A description is provided for Pseudomonas oryzicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Oryza sativa. Khu (43, 1019) reports that it also attacks more than 30 other species of wild and cultivated Gramineae. DISEASE: Bacterial browning, brown spot, or brusone of rice. Greyish-green diffuse areas appear on the sheaths of the panicle; they turn brown, then reddish-brown, black and finally dry up and die. Panicles become infected as they emerge, while stems, seeds and, exceptionally, the leaves may be infected. GEOGRAPHICAL DISTRIBUTION: Hungary, E. and N.E. China (43, 736), and Japan (44, 2139; the name in the penultimate line of this abstract should be P. oryzicola). TRANSMISSION: No detailed information. Klement states that wet, windy weather favours spread, suggesting transmission in rain splashes.

Cochliobolus miyabeanus. [Descriptions of Fungi and Bacteria].

1971 ◽  
Author(s):  
M. B. Ellis
Keyword(s):  
Oryza Sativa ◽  
Geographical Distribution ◽  
Primary Infection ◽  
French Polynesia ◽  
Brown Spot ◽  
Seed Infection ◽  
Seedling Blight ◽  
Late Afternoon ◽  
Leaf Spots ◽  
Cochliobolus Miyabeanus

Abstract A description is provided for Cochliobolus miyabeanus. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Oryza sativa and other species of Oryza. DISEASE: Brown spot and seedling blight of rice. Oval leaf spots up to 1 cm long, at first usually brown, sometimes purplish, later forming white to grey centres, spots may coalesce and leaves wither. Glumes may be spotted, becoming velvety with sporulation. Infected seed is shrivelled and discoloured; coleoptiles bear lesions which can also occur on the roots of seedlings. GEOGRAPHICAL DISTRIBUTION: Widespread (CMI Map 92, ed. 3, 1966). Records not yet mapped: Angola, Cambodia, Chad, France (S.), French Polynesia, Hong Kong, Laos, Malawi, Nepal, Rhodesia. TRANSMISSION: Seed infection is important (mycelium remaining viable for up to 3 yr) and is probably responsible for most of the primary infection in young crops (9: 556; 34: 104). Grain is directly attacked and kernels in the flowering and milk stages are more susceptible than those in the soft dough and mature stages (45, 2834; 46, 317). Conidia are air-dispersed showing a diurnal periodicity with a max. in the late afternoon (43, 1017; 48, 3486).

Pyrenochaeta oryzae. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
Punithalingam. Punithalingam.
Keyword(s):  
Oryza Sativa ◽  
Sri Lanka ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Blade ◽  
Solomon Islands ◽  
Brown Spot ◽  
Infected Leaf ◽  
Nephotettix Virescens ◽  
Wet Weather

Abstract A description is provided for Pyrenochaeta oryzae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Oryza sativa. DISEASE: Sheath blotch of rice or known in Japanese as 'Yosho-kappanbyo' meaning sheath brown spot (Hashioka, 1972). The macroscopic symptoms are large brown lesions on leaf sheaths. At first lesions start from the margin of a sheath as dark brown oblong blotches which enlarge, become bluish-grey, finally covering the entire sheath. Lesions may reach up to 10 cm in length and often appear at the junction of sheath and leaf blade just below the collar without causing the collar to break. When dry the affected part of the sheath turns greyish-brown with or without distinct brown margins. GEOGRAPHICAL DISTRIBUTION: Africa (Sierra Leone, Swaziland); Asia (Burma, China, India, Japan, Malaysia, Philippines, Sri Lanka, Thailand); Australasia & Oceania (Fiji, Solomon Islands). TRANSMISSION: Presumably dispersed in the crop by splash-liberated conidia from infected leaf sheaths and glumes during wet weather. Lesions on leaves also appear at the site of oviposition of the green hopper, Nephotettix bipunctatus[Nephotettix virescens] (Hashioka, 1972).

Rice grassy stunt tenuivirus. [Distribution map].

1997 ◽  
Author(s):  
Keyword(s):  
Oryza Sativa ◽  
Sri Lanka ◽  
Papua New Guinea ◽  
Geographical Distribution ◽  
Tamil Nadu ◽  
Solomon Islands ◽  
New Guinea ◽  
Distribution Map ◽  
Brunei Darussalam ◽  
New Distribution

Abstract A new distribution map is provided for Rice grassy stunt tenuivirus Viruses: Tenuivirus. Hosts: Rice (Oryza sativa). Information is given on the geographical distribution in ASIA, Bangladesh, Brunei, Darussalam, China, India, Kerala, Tamil Nadu, Indonesia, Java, Nusa, Tenggara, Sulawesi, Sumatra, Japan, Kyushu, Korea Republic, Malaysia, Philippines, Sri Lanka, Taiwan, Thailand, Vietnam, OCEANIA, Fiji, Papua New Guinea, Solomon Islands.

Pestalotiopsis mangiferae. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
Hong Kong ◽  
Dominican Republic ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Host Plants ◽  
Solomon Islands ◽  
Mangifera Indica ◽  
Brown Spot ◽  
Leaf Spots

Abstract A description is provided for Pestalotiopsis mangiferae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Mangifera indica; also on Anacardium occidentale, Combretum decandrum, Eucalyptus spp., Mimusops spp., Vitis vinifera and many other unrelated host plants. DISEASE: Grey leaf spot of Mangifera indica. The spots vary in size from a few mm to several cm in length, are usually sharply delimited by a dark, raised border, and are silvery grey above and grey to brown below; leaf spots on other hosts are similar. Brown spot or rot of mango fruits is also known. GEOGRAPHICAL DISTRIBUTION: Ghana, Nigeria, Sierra Leone, Tanzania, Uganda, Zaire, Zambia; Bangladesh, Brunei, Burma, Hong Kong, India, Malaysia, Nepal, Sabah, Solomon Islands, Sri Lanka; Australia; Dominican Republic; Venezuela. TRANSMISSION: Inoculation studies with conidia and mycelium have shown P. mangiferae to be a weak parasite, capable of infecting young injured leaves, injured fruits, older uninjured leaves and healthy fruits if in contact with diseased tissue (35, 378; 40, 421). It has been isolated from soil, but the possibility of transmission through soil has not been investigated.

Heterodera oryzicola. [Distribution map].

2003 ◽  
Author(s):  
Keyword(s):  
Oryza Sativa ◽  
Geographical Distribution ◽  
Tamil Nadu ◽  
West Bengal ◽  
Madhya Pradesh ◽  
Distribution Map ◽  
Musa Spp ◽  
New Distribution

Abstract A new distribution map is provided for Heterodera oryzicola Rao & Jayaprakash Nematoda: Heteroderidae Hosts: Mainly rice (Oryza sativa), also banana and plantain (Musa spp.). Information is given on the geographical distribution in ASIA, India, Goa, Haryana, Kerala, Madhya Pradesh, Orissa, Tamil Nadu, West Bengal.

Septoria glycines. [Descriptions of Fungi and Bacteria].

1972 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Glycine Max ◽  
Geographical Distribution ◽  
Brown Spot ◽  
Early Symptoms ◽  
Central Canada

Abstract A description is provided for Septoria glycines. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Glycine max. DISEASE: Brown spot of soyabean (Glycine max). Early symptoms are usually on the cotyledons and first true leaves, spots are redish-brown, somewhat angular, up to 5 mm diam. and very numerous. They spread acropetally, coalesce and result in defoliation. Spots appear on stems and pods, which bear pycnidia (6: 74). GEOGRAPHICAL DISTRIBUTION: Occurs in E. Asia (China, Japan, USSR), and parts of E. and central Canada and USA (CMI Map 361, ed. 1, 1958). An additional record not yet mapped is Colombia. TRANSMISSION: Largely by seed which is penetrated mostly via the placenta and funicle; seed bears necrotic areas and pycnidia (35: 66; 37: 199).

scholarly journals QTL analysis of brown spot resistance in rice (Oryza sativa L.).

2008 ◽  
Vol 58 (1) ◽  
pp. 93-96 ◽  
Author(s):  
Hiroyuki Sato ◽  
Ikuo Ando ◽  
Hideyuki Hirabayashi ◽  
Yoshinobu Takeuchi ◽  
Sakae Arase ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Qtl Analysis ◽  
Oryza Sativa L ◽  
Brown Spot

Heterodera sacchari. [Distribution map].

2001 ◽  
Author(s):  
Keyword(s):  
Oryza Sativa ◽  
Burkina Faso ◽  
Geographical Distribution ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Saccharum Officinarum ◽  
Distribution Map ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
New Distribution

Abstract A new distribution map is provided for Heterodera sacchari Luc & Merny Nematoda: Tylenchida: Heteroderidae Hosts: Sugarcane (Saccharum officinarum) and rice (Oryza sativa). Information is given on the geographical distribution in ASIA, India, Delhi, Pakistan, Thailand, AFRICA, Benin, Burkina Faso, Chad, Congo, Cote d'Ivoire, Gambia, Ghana, Liberia, Nigeria, Senegal.

Rice tungro virus. [Distribution map].

1977 ◽  
Author(s):  
Keyword(s):  
Oryza Sativa ◽  
Geographical Distribution ◽  
Andhra Pradesh ◽  
West Bengal ◽  
Uttar Pradesh ◽  
Peninsular Malaysia ◽  
Distribution Map ◽  
Virus Distribution ◽  
New Distribution

Abstract A new distribution map is provided for Rice tungro virus Rivera & Ou. Hosts: Rice (Oryza sativa), Oryza spp. Information is given on the geographical distribution in ASIA, Bangladesh, India (Andhra Pradesh), Mysore (Uttar Pradesh, Bihar), (Kerala), (West Bengal), Indonesia (W. Java, S. Sumatra), (Kalimantan), Peninsular Malaysia, Philippines, Thailand.

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