Cylindrocladiella elegans. [Descriptions of Fungi and Bacteria].

1993 ◽  
Author(s):  
P. W. Crous
Keyword(s):  
South Africa ◽  
Glycine Max ◽  
Pisum Sativum ◽  
South African ◽  
Leaf Litter ◽  
Geographical Distribution ◽  
Arachis Hypogaea ◽  
Medicago Truncatula ◽  
Splash Dispersal

Abstract A description is provided for Cylindrocladiella elegans. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Arachis hypogaea, Eucalyptus leaf litter. DISEASE: Found on peanut roots, leaf litter and in soil. South African isolates have been found to be pathogenic to Medicago truncatula (alfalfa), Arachis hypogaea (peanut), Glycine max (soyabean) and Pisum sativum (pea). GEOGRAPHICAL DISTRIBUTION: South Africa. TRANSMISSION: Probably occurs by wind and splash dispersal.

Calonectria scoparia. [Descriptions of Fungi and Bacteria].

1993 ◽  
Author(s):  
P. W. Crous
Keyword(s):  
South Africa ◽  
Pisum Sativum ◽  
Geographical Distribution ◽  
Root Rot ◽  
Persea Americana ◽  
Damping Off ◽  
Araucaria Heterophylla ◽  
Splash Dispersal ◽  
Shoot Blight ◽  
Stem Cankers

Abstract A description is provided for Calonectria scoparia. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Acacia spp. (68, 1566), Araucaria heterophylla, Eucalyptus spp., Fragaria sp., Luma sp., Medicago sativa, M. truncatula, Persea americana, Pinus spp., Pisum sativum, Rhododendron spp., Prunus sp., Syncarpia gummifera. DISEASE: Damping off, root rot, cutting rot, stem cankers, leaf spotting, seedling and shoot blight. GEOGRAPHICAL DISTRIBUTION: Australia, Brazil, India, Kenya, Mauritius, South Africa. TRANSMISSION: Wind and splash dispersal.

Diplocarpon earliana. [Descriptions of Fungi and Bacteria].

1976 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
South Africa ◽  
Hong Kong ◽  
North America ◽  
South America ◽  
Eastern Europe ◽  
Geographical Distribution ◽  
Canary Islands ◽  
Perfect State ◽  
Splash Dispersal ◽  
The Tropics

Abstract A description is provided for Diplocarpon earliana. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Fragaria. DISEASE: Strawberry leaf scorch. GEOGRAPHICAL DISTRIBUTION: Throughout temperate zones and extending into the tropics in Malaysia, Taiwan, Australia and New Guinea; Africa (Rhodesia, Zambia, South Africa, Canary Islands); Europe (except Ireland, Spain, Sweden, Russia); North America (Canada, USA, Jamaica); South America (Brazil, Uruguay); Asia (Armenia, Cambodia, Hong Kong, India, Israel, Japan, W. Malaysia). Appears to be most important in USA and eastern Europe (CMI Map 452, ed. 1, 1969). TRANSMISSION: Mainly by splash dispersal of conidia from infected leaves. Ascospores appear to be unimportant and in some regions (Poland; 46, 2074) where the perfect state has not been found.

Scirtothrips aurantii. [Distribution map].

1961 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
South African ◽  
Geographical Distribution ◽  
Distribution Map ◽  
Southern Rhodesia ◽  
New Distribution

Abstract A new distribution map is provided for Scirtothrips aurantii Faure (Thysanoptera, Thripidae) (South African Citrus Thrips). Hosts: Citrus, Acacia spp., etc. Information is given on the geographical distribution in AFRICA, Egypt, Nyasaland, Republic of South Africa, Southern Rhodesia, Sudan.

Ditylenchus africanus. [Distribution map].

2001 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
Geographical Distribution ◽  
Arachis Hypogaea ◽  
Distribution Map ◽  
Field Crops ◽  
New Distribution

Abstract A new distribution map is provided for Ditylenchus africanus Wendt et al. Nematoda: Tylenchida: Anguinidae Hosts: Groundnut (Arachis hypogaea); also a range of field crops. Information is given on the geographical distribution in AFRICA, Mozambique, South Africa.

A Taxonomic Revision of the Othonna bulbosa Group (Asteraceae: Senecioneae: Othonninae)

2019 ◽  
Vol 104 (4) ◽  
pp. 515-562 ◽  
Author(s):  
Simon L. Magoswana ◽  
James S. Boatwright ◽  
Anthony R. Magee ◽  
John C. Manning
Keyword(s):  
South Africa ◽  
South African ◽  
Geographical Distribution ◽  
Taxonomic Revision ◽  
Cape Floristic Region ◽  
The South ◽  
Winter Rainfall ◽  
African Species ◽  
Taxonomic Treatment ◽  
Rainfall Region

Othonna L. (Asteraceae: Senecioneae: Othonninae) is a genus of some 120 species concentrated in the Greater Cape Floristic Region (GCFR) of South Africa, with a few species extending into southern Namibia, Angola, and Zimbabwe. The South African species of Othonna were last revised more than a century ago, and many species, particularly from the southern African winter rainfall region, remain poorly understood. This study focused on the geophytic species comprising the O. bulbosa group, distinguished by their tuberous rootstock and annual, leafy, aerial stems. A comprehensive taxonomic treatment is presented, including descriptions, complete nomenclature and typification, illustrations, and geographical distribution. Twenty-five species are recognized, of which four are newly described (O. lilacina Magoswana & J. C. Manning, O. nigromontana Magoswana & J. C. Manning, O. revoluta Magoswana & J. C. Manning, and O. sinuata Magoswana & J. C. Manning), and 18 names are reduced to synonymy. The species differ in habit, shape and incision of foliage, capitulum type (radiate vs. disciform), number of involucral bracts, pappus length, and cypselae (myxogenic vs. nonmyxogenic). We place the species into four morphologically diagnosable series (series Heterophyllae Magoswana & J. C. Manning, series Disciformes Magoswana & J. C. Manning, series Perfoliatae Magoswana & J. C. Manning, and series Undulosae Magoswana & J. C. Manning) based on habit and capitulum type.

The genus Rubus in South Africa. I. Chromosome numbers and geographical distribution of species

Bothalia ◽  
1984 ◽  
Vol 15 (3/4) ◽  
pp. 591-596 ◽  
Author(s):  
J. J. Spies ◽  
H. Du Du Plessis
Keyword(s):  
South Africa ◽  
South African ◽  
Geographical Distribution ◽  
Chromosome Numbers ◽  
The Other ◽  
The South ◽  
African Species ◽  
Rubus Species ◽  
First Time

The geographical distribution of 14 of the Rubus species in South Africa is presented. Chromosome numbers of nine of the species were determined: six for the first time, one is confirmed and additional polyploid levels are described for the other two species. It is demonstrated that the South African species of the subgenus Idaeobatus contain less diploid specimens and more polyploid specimens than their extra-African counterparts. This phenomenon could be attributed to hybridization between the subgenera Eubatus and  Idaeobatus.

Calonectria colhounii var. macroconidialis. [Descriptions of Fungi and Bacteria].

1993 ◽  
Author(s):  
P. W. Crous
Keyword(s):  
South Africa ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Root Rot ◽  
Eucalyptus Grandis ◽  
Splash Dispersal

Abstract A description is provided for Calonectria colhounii var. macroconidialis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Eucalyptus grandis (Crous et al., 1993a). DISEASE: Leaf spot, root rot, wilt (Crous et al., 1993b). GEOGRAPHICAL DISTRIBUTION: South Africa (Crous et al., 1993a, b). TRANSMISSION: Splash dispersal in Eucalyptus cutting nurseries.

Fusarium oxysporum f. sp. vasinfectum. [Descriptions of Fungi and Bacteria].

1992 ◽  
Author(s):  
D. Brayford
Keyword(s):  
South Africa ◽  
Puerto Rico ◽  
Glycine Max ◽  
Nicotiana Tabacum ◽  
Fusarium Oxysporum ◽  
Geographical Distribution ◽  
Central African Republic ◽  
Lupinus Luteus ◽  
Vascular Wilt ◽  
Wide Range

Abstract A description is provided for Fusarium oxysporum f. sp. vasinfectum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cotton (Gossipium spp., including G. hirsutum, G. barbadense, G. arboreum, G. herbaceum), Chinese lantern (Physalis alkekengi), lucerne (alfalfa) (Medicago sativa), lupin (Lupinus luteus), okra (Abelmoschus esculentus), soyabean (Glycine max), tobacco (Nicotiana tabacum). A wide range of other plants may also be infected without external symptoms (51, 2512). DISEASE: Vascular wilt. GEOGRAPHICAL DISTRIBUTION: Widespread (IMI map 362). Africa: Central African Republic, Congo, Egypt, Ethiopia, Israel, Madagascar, Republic of South Africa, Senegal, Somalia, Sudan, Tanzania, Uganda, Zimbabwe. America: Argentina, Brazil, Chile, Colombia, Guatemala, Mexico, Nicaragua, Paraguay, Peru, Puerto Rico, Salvador, St. Kitts-Nevis, St. Vincent, USA (south eastern states), Venezuela. Asia: Burma, China, India, Iran, Iraq, Pakistan, Taiwan, USSR. Europe: France, Greece, Italy, Romania, Yugoslavia. TRANSMISSION: The fungus is soil borne and may be transmitted by seed (11, 713; 32, 186) and in irrigation water (62, 4911).

Ramularia onobrychidis. [Descriptions of Fungi and Bacteria].

2004 ◽  
Author(s):  
J. C. David
Keyword(s):  
Great Britain ◽  
Geographical Distribution ◽  
Arachis Hypogaea ◽  
Leaf Spot ◽  
Republic Of Georgia ◽  
Leaf Fall ◽  
Splash Dispersal ◽  
Rain Splash

Abstract A description is provided for Ramularia onobrychidis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot of sainfoin. HOSTS: Arachis hypogaea, Onobrychis altissima, O. arenaria, O. hajastana, O. hohenhackeriana, O. miniata, O. oxyodonta, O. pulchella, O. sintenisii, O. transcaucasica, O. vaginalis, O. viciifolia (BRAUN, 1998) (Fabaceae). GEOGRAPHICAL DISTRIBUTION: ASIA: Armenia, Azerbaijan (EIBATOVA, 1958), Republic of Georgia, Kabardino-Balkariya, Kazakhstan, Kirgistan, Tadzhikistan (OSIPYAN, 1975), Turkmenistan, Uzbekistan. EUROPE: Austria, Belarus (OSIPYAN, 1975), Bulgaria, Denmark, Estonia, France, Germany, Great Britain, Hungary, Italy, Latvia, Lithuania, Moldova (OSIPYAN, 1975), Romania (BONTEA, 1985), Russia, Sweden, Turkey, Ukraine, Serbia. TRANSMISSION: By wind and rain-splash dispersal of conidia. HUGHES (1949) stated that sclerotia are formed in the lesions: the leaflets are readily detached and in moist conditions the sclerotia can develop after leaf fall, they can also be blown around aiding dispersal of the fungus.

Regulation of Amitrole and Diuron Toxicity by Phosphorus

Weed Science ◽  
1970 ◽  
Vol 18 (5) ◽  
pp. 619-623 ◽  
Author(s):  
F. L. Selman ◽  
R. P. Upchurch
Keyword(s):  
Triticum Aestivum ◽  
Zea Mays ◽  
Glycine Max ◽  
Phaseolus Vulgaris ◽  
Pisum Sativum ◽  
Arachis Hypogaea ◽  
Lolium Multiflorum ◽  
Soil Phosphorus ◽  
Phosphorus Level ◽  
Sorghum Vulgare

The influence of soil-applied phosphorus on the phytotoxicity of soil-applied 3-amino-s-triazole (amitrole) and 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron) for corn(Zea maysL.), ryegrass(Lolium multiflorumL.), rye(Secale cerealeL.), snapbeans(Phaseolus vulgarisL.), soybeans(Glycine max(L.) Mers.), sorghum(Sorghum vulgarePers.), wheat(Triticum aestivumL.), cotton(Gossypium hirsutumL.), peanuts(Arachis hypogaeaL.), and peas(Pisum sativumL.) was studied under greenhouse conditions. All species except cotton and peanuts indicated an amitrole-phosphorus interaction. Greater phytotoxicity was found for a given rate of amitrole as the soil phosphorus level was increased. A diuron-phosphorus interaction was observed for cotton and soybeans only.

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