scholarly journals Impact of the flower-galling midge, Dasineura rubiformis Kolesik, on the growth of its host plant, Acacia mearnsii De Wild, in South Africa

2013 ◽  
Vol 87 ◽  
pp. 118-121 ◽  
Author(s):  
Fiona A.C. Impson ◽  
Judy A. Post ◽  
John H. Hoffmann
Keyword(s):  
South Africa ◽  
Host Plant ◽  
Acacia Mearnsii

Carmenta chromolaenae Eichlin, a new species (Lepidoptera: Sesiidae) for the biological control of Chromolaena odorata (L.) King & Robinson (Asteraceae)

Zootaxa ◽  
2009 ◽  
Vol 2288 (1) ◽  
pp. 42-50 ◽  
Author(s):  
THOMAS D. EICHLIN ◽  
OONA S. DELGADO ◽  
LORRAINE W. STRATHIE ◽  
COSTAS ZACHARIADES ◽  
JOSE CLAVIJO
Keyword(s):  
South Africa ◽  
Biological Control ◽  
New Species ◽  
Host Plant ◽  
Control Agent ◽  
Chromolaena Odorata ◽  
Male And Female ◽  
Invasive Range ◽  
Clearwing Moth ◽  
A New Species

A new species of Sesiidae, Carmenta chromolaenae Eichlin, is described to make the name available to researchers evaluating the moth's potential for biological control of its host plant, Chromolaena odorata, in South Africa and other parts of the plant's invasive range. This clearwing moth species was reared from the host plant in Venezuela. The adult moth, including the male and female genitalia, larva, and pupa are described and illustrated. Its biology and possible use as a control agent are discussed.

scholarly journals First Report of Ceratocystis Wilt of Acacia mearnsii in Uganda

Plant Disease ◽  
2001 ◽  
Vol 85 (9) ◽  
pp. 1029-1029 ◽  
Author(s):  
J. Roux ◽  
M. J. Wingfield ◽  
D. Mujuni Byabashaija
Keyword(s):  
South Africa ◽  
Ribosomal Rna ◽  
Acacia Mearnsii ◽  
Internal Transcribed Spacer Region ◽  
First Report ◽  
Ceratocystis Wilt ◽  
Forestry Industry ◽  
Xylem Discoloration ◽  
Stem Cankers ◽  
Southwestern Uganda

Ceratocystis albofundus, the cause of Ceratocystis wilt of Acacia mearnsii, is known only from South Africa. The only known hosts of this fungus are A. mearnsii, Acacia decurrens, and two species of Protea (1). This pathogen causes stem cankers, xylem discoloration, wilt, and the death of susceptible A. mearnsii trees in South Africa, leading to considerable losses to the forestry industry (1). During a recent survey of forest plantation diseases in Uganda, A. mearnsii trees with “streaked” discoloration of the xylem, typical of Ceratocystis infection, were found in southwestern Uganda. These trees had been damaged mechanically by the harvesting of side branches and/or stems for firewood and construction. Xylem discoloration was spreading through the trees from these wounds. Trees showed typical stem cankers and gummosis, which is associated with C. albofundus infection, as well as foliage wilting. Isolations from infected trees yielded a fungus that was similar morphologically to C. albofundus, with typical hat-shaped ascospores and light-colored perithecial bases (2). Sequencing of the internal transcribed spacer region of the ribosomal RNA operon of Ugandan isolates (CMW5329, CMW5964, GenBank accession no. AF388947) confirmed their identification, grouping them with C. albofundus and separating them from all other Ceratocystis species. This is the first report of C. albofundus from a country other than South Africa. C. albofundus is an important pathogen, and strategies to reduce losses need to be established in Uganda because the aggressiveness of C. albofundus to A. mearnsii has been shown in inoculation experiments (1). References: (1) Morris et al. Plant Pathol. 42:814, 1993. (2) Wingfield et al. Syst. Appl. Microbiol. 19:191, 1996.

Prays citri. [Distribution map].

1982 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
Host Plant ◽  
Geographical Distribution ◽  
Canary Islands ◽  
Distribution Map ◽  
Prays Citri ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Prays citri (Mill.) (Lepid., Yponomeutidae) (Citrus Flower Moth). Host Plant: Citrus. Information is given on the geographical distribution in EUROPE, Corsica, Dodecanese Islands, France, Greece, Italy, Malta, Portugal, Sardinia, Sicily, Spain, ASIA, Cyprus, Israel, Lebanon, Turkey, AFRICA, Algeria, Canary Islands, Egypt, Libya, Madeira, Mauritius, Morocco, Seychelles, South Africa, Tunisia, Zimbabwe.

scholarly journals The Genus Urodontidius Louw (Anthribidae: Urodontinae) Rediscovered and Its Biological Secrets Revealed: A Tribute to Schalk Louw (1952–2018)

Diversity ◽  
2018 ◽  
Vol 10 (3) ◽  
pp. 92 ◽  
Author(s):  
Rolf Oberprieler ◽  
Clarke Scholtz
Keyword(s):  
South Africa ◽  
Life History ◽  
Host Plant ◽  
Life Histories ◽  
Morphological Characters ◽  
Silk Spinning

The paper records the rediscovery of the rare Urodontidius enigmaticus Louw, 1993 in South Africa, based on specimens reared from galls in the succulent leaves of Ruschia versicolor. The original account of some of the morphological characters of the species is corrected, and its habitus, antennae, pygidium and genitalia are illustrated. Its life history and galling habit on its host plant are described and illustrated, and its larva is compared with those of the genera Urodontellus Louw and Urodontus Louw, which represent different larval types with different life histories. The silk-spinning habits of the Urodontellus larva are briefly described. A tribute to the late Schalk Louw is presented, together with a list of his publications on weevils.

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