Browsing Faculty of Natural and Agricultural Sciences by Title
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The host status of Amaranthus spp. genotypes to Meloidogyne spp. and verification of resistance in genotype Thohoyandou
(Elsevier, 2019)African leafy vegetables (ALVs) play a crucial role in substituting the diets and household income of local people. Production of ALVs is, however, hampered by plant-parasitic nematodes, particularly Meloidogyne spp. The ... -
The host status of Brassicaceae to Meloidogyne and their effects as cover and biofumigant crops on root-knot nematode populations associated with potato and tomato under South African field conditions
(Elsevier, 2018)Cover and biofumigant crops of Brassicaceae are potential alternatives to synthetically-derived nematicides for managing root-knot nematode pests in various crops. The host status of Eruca sativa (cvs. Rocket Trio and ... -
Host status of rotation crops in Asian rice-based cropping systems to the rice root-knot nematode Meloidogyne graminicola
(Springer, 2016)Rotation with nonhost crops is an important practice used for root-knot nematode (RKN) management. Screenhouse experiments were conducted to evaluate the response infection of 27 cultivars belonging to 14 crops (blackgram, ... -
Host suitability of selected South African maize genotypes to the root-knot nematode species Meloidogyne incognita race 2 and Meloidogynejavanica: a preliminary study
(Scientific Publishing (NISC), 2011)Thirty-one commercial maize (Zea mays L.) hybrids and open-pollinated varieties (OPV's) were screened in separate greenhouse trials with a resistant inbred line MP712W as reference genotype for host suitability to Meloidogyne ... -
Host-dependent differences in measures of condition associated with Anilocra spp. parasitism in two coral reef fishes
(Springer, 2018)Parasites account for over half of the biodiversity on coral reefs, yet their ecological impacts are poorly understood. Cymothoid isopods of the genus Anilocra are large, conspicuous ectoparasites of coral reef fishes. ... -
Host-dependent differences in resource use associated with Anilocra spp. parasitism in two coral reef fishes, as revealed by stable carbon and nitrogen isotope analyses
(Wiley, 2017)The role of parasites in trophic ecology is poorly understood in marine ecosystems. Stable isotope analyses (SIA) have been widely used in studies of trophic ecology, but have rarely been applied to study the role of ... -
Hotspots of stream tadpole diversity in forest and agricultural landscapes in Ranomafana, Madagascar
(Springer, 2020)Logging and human-induced conversion of natural forests into agricultural areas are major drivers of biodiversity loss in the tropics. Anuran larvae can be highly diverse, can reach high biomass and can play important roles ... -
How efficient is the Johannesburg Stock Exchange really?
(AOSIS, 2018)Background: There are various studies that confirm the efficiency of the Johannesburg Stock Exchange (JSE), implying that there are no opportunities for active portfolio managers to earn excess returns over the long ... -
How females of Achtheinus spp. (Pandaridae: Siphonostomatoida) attach to their elasmobranch hosts with notes on their effects on the hosts fins
(Institute of Parasitology, Biology Centre CAS, 2015)Copepods of the genus Achtheinus Wilson, 1908 (Pandaridae) are parasites of elasmobranchs that attach to their fins, gill slits and around the nostrils. Specimens of Achtheinus pinguis Wilson, 1912 were collected and ... -
How gravitational lensing helps y-ray photons avoid y-y absorption
(IOP Publishing, 2014)We investigate potential γ – γ absorption of γ-ray emission from blazars arising from inhomogeneities along the line of sight, beyond the diffuse Extragalactic Background Light (EBL). As plausible sources of excess γ – γ ... -
How to use voluntary, self-regulatory and alternative environmental compliance tools: Some lessons learnt
(North West University, 2010) -
How toxic is a non-toxic nanomaterial: behaviour as an indicator of effect in Danio rerio exposed to nanogold
(Elsevier, 2019)Gold nanoparticles are used as drug delivery vectors based on the assumption that they have low toxicity. Literature has, however, produced conflicting results over the last few years. As such, this study aimed to investigate ... -
How will South Africa’s mandatory salt reduction policy affect its salt iodisation programme? A cross-sectional analysis from the WHO-SAGE Wave 2 Salt & Tobacco study
(BMJ Publishing Group, 2018)Objective The WHO’s global targets for non-communicable disease reduction recommend consumption of<5 g salt/day. In 2016, South Africa was the first country to legislate maximum salt levels in processed foods. South Africa’s ... -
Human health risk from consumption of marine fish contaminated with DDT and its metabolites in Maputo Bay, Mozambique
(Springer, 2018)Many countries with incidence of malaria, including those surrounding Maputo Bay, use dichloro-diphenyl-trichloroethane (DDT) to reduce mosquitoes. This study is the first to estimate the human health risk associated with ... -
Humic acid and enzymes in canola-based broiler diets: effects on bone development, intestinal histomorphology and immune development
(South African Society for Animal Science (SASAS), 2017)The objective of the study was to investigate the effects of dietary inclusion of humic acid and enzymes on bone development, histomorphology of internal organs and the incidence of rickets in broiler chickens fed canola-based ... -
Humoral and cellular immune responses in mice after airway administration of Bacillus thuringiensis Cry1Ab and MON810 cry1Ab–transgenic maize
(Taylor & Francis, 2015)Genetically modified (GM) crops may bring new proteins with immunogenic and allergenic properties into the food and feed chains. The most commonly grown GM maize, MON810, expresses a modified version of the insecticidal ... -
Humusica 2, article 16: Techno humus systems and recycling of waste
(Elsevier, 2018)Techno humus systems correspond to man-made topsoils under prominent man influence. They may be purposely conceived for supporting agricultural activities or dumping of waste products, sometimes abandoned to an unknown ... -
Hurricane-induced disturbance increases genetic diversity and population admixture of the direct-brooding isopod, Gnathia marleyi
(Springer Nature, 2020)Severe disturbances can substantially alter eco-evolutionary processes and dynamics. While the impacts of catastrophic events on the biophysical attributes of communities are sometimes assessed, their effects on the genetic ... -
Hybrid compounds from thiosemicarbazone and triazole as antidiabetic agents and their antioxidant potentials
(Allied Academies, 2017)Diabetes mellitus is a metabolic disease that threatens and reduces the quality of life. Eight hybrids (1ah) of thiosemicarbozone and triazole were screened for their effects on genes related to type 2 diabetes as well as ... -
Hybrid DFT study of MWCNT/Zr-doped SrTiO3 heterostructure: hydrogen production, electronic properties and charge Carrier mediator role of Zr4+ ion
(Elsevier, 2018)Over the past decade, remarkable efforts have been made to design low-cost, non-toxic, stable and efficient photocatalyst for water splitting. In the present work, an effective alternative approach to enhance hydrogen ...