Browsing Natural and Agricultural Sciences by Title

Browsing Natural and Agricultural Sciences by Title

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  • First Report of soft rot of potatoes caused by Dickeya dadantii in Zimbabwe 
    Ngadze, Elizabeth; Coutinho, Teresa A.; Van der Waals, Jacqueline Elise (American Phytopathological Society, 2010-10)
    A survey was carried out in the potato- (Solarium tuberosum L.) growing regions of Zimbabwe in April 2009 to assess the prevalence of bacterial soft rot. A total of 125 tubers with soft rot symptoms were collected. The ...
  • The first report of storage mites, Caloglyphus hughesi (Acaridae) on laboratory-reared Aethina tumida Murray (Coleoptera: Nitidulidae) in South Africa 
    Crewe, Robin M.; Strauss, Ursula; Human, Hannelie; Pirk, Christian Walter Werner; Crewe, Robin M. (Entomological Society of Southern Africa, 2010)
    No abstract available.
  • First report of Teratosphaeria gauchensis causing stem canker of Eucalyptus in Kenya 
    Machua, Joseph; Jimu, L.; Njuguna, J.; Wingfield, Michael J.; Mwenje, E.; Roux, Jolanda (Wiley, 2016-04)
    Teratosphaeria stem canker is an important disease of Eucalyptus species in many parts of the world where these trees are intensively propagated in plantations. Symptoms similar to those of Teratosphaeria stem canker ...
  • First report of Teratosphaeria zuluensis causing stem canker of Eucalyptus grandis in Uganda 
    Jimu, L.; Wingfield, Michael J.; Mwenje, E.; Roux, Jolanda (Wiley, 2014-06)
    Teratosphaeria stem canker is one of the most important diseases to have emerged on nonnative plantation-grown Eucalyptus trees globally. In 2012, Eucalyptus grandis trees with typical Teratosphaeria stem canker symptoms ...
  • First report of the aphid parasitoid Aphidius ervi Haliday (Hymenoptera, Braconidae, Aphidiinae) from South Africa 
    Muller, L.; Kruger, Kerstin; Kfir, Rami (Entomological Society of Southern Africa, 2014)
    In August 2010, Aphidius ervi Haliday (Hymenoptera, Braconidae, Aphidiinae) was reared from a sample of the potato aphid, Macrosiphum euphorbiae (Thomas), which was collected in the field on Malva parviflora L. (Malvaceae) ...
  • First report of the detection of Bean yellow mosaic virus (BYMV) on Tropaeolum majus ; Hippeastrum spp. and Liatris spp. in South Africa 
    Schulze, Azille; Roberts, Ronel; Pietersen, Gerhard (American Phytopathological Society, 2017-05)
    The potyvirus, Bean yellow mosaic virus (BYMV) is an economically important plant virus which infects many leguminous crops (family Fabaceae) as well as members of the Liliaceae. BYMV has been detected in South Africa ...
  • First report of the thick-tailed bushbaby (Otolemur crassicaudatus) being preyed upon by an endemic carnivore (Caracal caracal) in South Africa 
    Cuozzo, Frank P.; Halajian, Ali; Sauther, M.L.; Rampedi, K.M.; Millette, J.B. (NISC (Pty) Ltd and Informa UK Limited (trading as Taylor & Francis Group), 2021)
    To date, there have been few published reports of Caracal spp. (or other non-domestic carnivores) preying upon nocturnal strepsirrhine primates anywhere in continental Africa. However, in South Africa, most studies of ...
  • First report of the wattle rust pathogen, Uromycladium acaciae (Raveneliaceae, Pucciniales) in Ethiopia 
    Pham, Nam Q.; Wingfield, Michael J.; Marincowitz, Seonju; Tanga, Agena A.; Tiki, Kumela R.; Kassie, Weldesenbet B.; Hurley, Brett Phillip; Germishuizen, Ilaria; Lawson, Simon A.; Healey, Madaline A.; Wondafrash, Mesfin (Oxford University Press, 2024-04)
    Australian Acacia species are among the most important trees planted for wood and pulp production in several African countries, including Ethiopia. In 2020, symptoms of a serious shoot and leaf rust disease were observed ...
  • The first report of urine overmarking of pro-oestrus female dung by a male white rhino 
    Marneweck, Courtney; Jürgens, Andreas; Shrader, A.M. (Adrian) (NISC (Pty) Ltd and Informa UK Limited (trading as Taylor and Francis Group), 2019)
    Although observed in other Perrisodactyla, urine overmarking in white rhinos has not been described. Using a single opportunistic sighting, we were able to collect two dung samples from one oestrous female white rhino; one ...
  • First Sagittarius A Event Horizon Telescope results. III. Imaging of the Galactic center supermassive black hole 
    Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Barrett, John; Baubock, Michi; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Chen (陈永军), Yongjun; Cheng, Xiaopeng; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger (IOP Publishing, 2022-05-10)
    We present the first event-horizon-scale images and spatiotemporal analysis of Sgr A* taken with the Event Horizon Telescope in 2017 April at a wavelength of 1.3 mm. Imaging of Sgr A* has been conducted through surveys ...
  • First Sagittarius A Event Horizon Telescope results. IV. Variability, morphology, and black hole mass 
    Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Barrett, John; Baubock, Michi; Benson, Bradford A.; Blackburn, Lindy; Blundell, Raymond; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Koushik; Chatterjee, Shamiuntranslated; Chen, Ming-Tang; Chen (陈永军), Yongjun; Cheng, Xiaopeng; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger (IOP Publishing, 2022-05-10)
    Please read abstract in the article.
  • First Sagittarius A Event Horizon Telescope results. VI. Testing the black hole metric 
    Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Bach, Uwe; Baczko, Anne-Kathrin; Ball, David; Balokovic, Mislav; Barrett, John; Baubock, Michi; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Bustamante, Sandra; Byun, Do-Young; Carlstrom, John E.; Ceccobello, Chiara; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Koushik; Chatterjee, Shami; Chen, Ming-Tang; Chen (陈永军), Yongjun; Cheng, Xiaopeng; Cho, Ilje; Christian, Pierre; Conroy, Nicholas S.; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Cui, Yuzhu; Davelaar, Jordy; De Laurentis, Mariafelicia; Deane, Roger (IOP Publishing, 2022-05-10)
    Astrophysical black holes are expected to be described by the Kerr metric. This is the only stationary, vacuum, axisymmetric metric, without electromagnetic charge, that satisfies Einstein’s equations and does not ...
  • The first space-related study of a kombucha multimicrobial cellulose-forming community : preparatory laboratory experiments 
    Podolich O.; Zaets, I.; Kukharenko, O.; Orlovska, I.; Reva, Oleg N.; Khirunenko, Ludmila; Sosnin, M.; Haidak, A.; Shpylova, S.; Rohutskyy, I.; Kharina, A.; Skoryk, M.; Kremenskoy, M.; Klymchuk, D.; Demets, R.; De Vera, J.P.; Kozyrovska, Natalia (Springer, 2017-06)
    Biofilm-forming microbial communities are known as the most robust assemblages that can survive in harsh environments. Biofilm-associated microorganisms display greatly increased resistance to physical and chemical adverse ...
  • The first syntheses of single enantiomers of the major methoxymycolic acid of Mycobacterium tuberculosis 
    Al Dulayymi, Juma'a R.; Baird, Mark S.; Roberts, Evan; Deysel, Madrey; Verschoor, J.A. (Jan Adrianus), 1953- (Elsevier, 2007-03-19)
    Mycolic acids (Scheme 1) are major constituents of the cell envelope of Mycobacterium tuberculosis and other mycobacteria, some of which are pathogenic to animals and humans.1 and 2 Their presence is thought to be linked ...
  • A first worldwide multispecies survey of invasive Mediterranean pine bark beetles (Coleoptera: Curculionidae, Scolytinae) 
    Faccoli, Massimo; Gallego, Diego; Branco, Manuela; Brockerhoff, Eckehard G.; Corley, Juan C.; Coyle, David R.; Hurley, Brett Phillip; Jactel, Herve; Lakatos, Ferenc; Lantschner, Victoria; Lawson, Simon; Martinez, Gonzalo; Gomez, Demian F.; Avtzis, Dimitrios (Springer, 2020-05)
    Several European and Mediterranean species of pine bark beetles (Coleoptera: Curculionidae: Scolytinae) have become established in North America and the southern hemisphere, posing a novel threat to planted and naturally-occurring ...
  • First year with COVID-19 : assessment and prospects 
    Bergquist, Robert; Kiani, Behzad; Manda, S.O.M. (Samuel) (PAGEpress, 2020)
    No abstract available.
  • First- and second-order global sequence stratigraphic correlations and accommodation charts for the Kaapvaal, Karelian, São Francisco (-Congo) and Slave cratons : an introduction 
    Eriksson, Patrick George; Catuneanu, Octavian; Bumby, Adam John (Elsevier, 2012-05)
    This work provides a pilot study of global sequence stratigraphic correlation for the Precambrian for five chosen cratons. Detailed chronostratigraphic charts summarize the supracrustal geological evolution of each craton, ...
  • First-order approximation towards empirical seismic vulnerability assessment of low-cost unreinforced masonry buildings in South Africa 
    Nqasha, Thando; Khoyratty, Zeenat; Akombelwa, Mulemwa; Singh, Mayshree; Kijko, Andrzej (Taylor and Francis, 2024)
    The 5 August 2014 Orkney earthquake in South Africa caused significant damage to low-cost unreinforced masonry buildings. After the earthquake, post-earthquake surveys were conducted to assess damage and deduce the intensity ...
  • First-order aspects of tree paths 
    Kellerman, Ruaan (Oxford University Press, 2015-08)
    Tree paths are investigated using first-order logic. The following results are obtained: (i) every definable path can be defined by a firstorder formula using at most one parameter chosen from the path itself; (ii) a ...
  • First-order regional seismotectonic model for South Africa 
    Singh, Mayshree; Kijko, Andrzej (Springer, 2011-10)
    A first-order seismotectonic model was created for South Africa. This was done using four logical steps: geoscientific data collection, characterisation, assimilation and zonation. Through the definition of subunits of ...