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Evaluation of the effects of scorching caused by the directed application of a paraquat-containing herbicide mixture to the base of maize plants at various ages
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. E.L. Thomas --- ,The effect of herbicides which scorched the lower leaves of maize was compared in three seasons. The first season was relatively dry whilst the other two were wetter seasons. A mixture of cyanazine + atrazine + paraquat + a wetting... -
A comparison of seed vigour tests for maize (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.A. van de Venter --- , Republic of South Africa H.W. Lock --- , Republic of South AfricaA number of seed vigour tests were conducted on two groups of maize seed lots. One group consisted of six seed lots of different cultivars while the other group consisted of six sub-lots of one cultivar, artificially aged for different... -
Patrone van opkoms van sekere onkruide in veldtoestande
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E.J du Toit --- , Republiek van Suid-Afrika M.R. Le Court De Billot --- , Republiek van Suid-AfrikaOpkomspatrone van 24 onkruidspesies, wat algemeen in bewerkte lande in somerreënvalgebiede voorkom, is ondersoek. Saad van onkruidspesies is gedurende die vorige herfs in die veld versamel. Een duisend sade van elk van die onkruide is ewekansig gekies uit die versamelde... -
The effects of various seed treatments on the germination, coleoptile length and emergence of South African winter wheats (Triticum aestivum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.L. Purchase --- Small Grain Centre, Republic of South Africa J. le Roux --- Small Grain Centre, Republic of South Africa H.A. van Tonder --- Small Grain Centre, Republic of South AfricaThe effect of four seed treatments and storage period of treated seed on the germination, coleoptile length and emergence of five winter wheat genotypes was investigated. The first trial was conducted under controlled conditions to determine the effect of triadimenol,... -
The effect of a diurnal period of supra-optimal temperature on the seed vigour of sunflower
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- , Republic of South AfricaThe daily maximum temperature in the upper 20 mm of sandy soils is often higher than 45°C on cloudless days during November, December and January in the summer rainfall region of South Africa. At these supra-optimal temperatures, sunflower seedling vigour... -
Phytotoxicity resulting from a combination of a pre-emergence herbicide and a pesticide seed dressing in maize (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E. J. Saayman-du Toit --- , South AfricaThis study was prompted by reports from maize producers, indicating phytotoxicity to occur when using pre-emergence herbicides in combination with seed dressings under cold conditions on sandy soils. A greenhouse experiment was conducted in which the insecticide imidacloprid and the... -
Effect of soil nutrient status on severity of seedling diseases and root rot of sorghum (Sorghum bicolor)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- , Republic of South AfricaThe hybrid NK283 was subjected to a range of nutrient element concentrations to determine their effect on predisposition of sorghum to seedling diseases and root rot. Emergence was not affected by soil nutrient status. Similarly N, P and K did... -
A comparison between hydroponics systems and pots for growing wheat in the greenhouse
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. G.A. du Toit --- , M.T. Labuschagne --- Department of Plant Sciences, South AfricaGrowing wheat hydroponically for crossing block and germplasm multiplication purposes may hold emergence, yield and seed quality advantages compared to traditional planting methods. The aim of this study was to compare wheat planted in pots with soil to hydroponically grown... -
Predicting seedling emergence of cabbage and onion using vigour tests
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.K. Fessehazion --- Department of Plant Production and Soil Science, South Africa D. Marais --- Department of Plant Production and Soil Science, South Africa P.J. Robbertse --- Department of Plant Production and Soil Science, South AfricaPredicting seedling emergence using standard and non-standard germination temperatures, standard accelerated ageing (AA) and saturated salt accelerated ageing (SSAA) tests, were investigated. Germinations were performed at temperatures of 10°, 20°, 20°/30° and 30°C for cabbage (Brassica oleracea var. capitata L.)... -
Early establishment performance of local and hybrid maize under two water stress regimes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Mabhaudhi --- , Pietermaritzburg A.T. Modi --- , PietermaritzburgMaize (Zea mays L.) is the major grain crop in South Africa where most subsistence farmers still plant landraces. The objective of this study was to compare two landrace selections of maize with two hybrids popular among small-scale farmers in... -
Soil seed bank evaluation and seedling establishment along a degradation gradient in a semi-arid rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HA SnymanThe effects of rangeland degradation on the size and species composition of the seed bank and seedling establishment in the field were quantified over a two year period (2000–2001 and 2001–2002 growing seasons). Soil seed bank sampling was carried out... -
Vermicompost leachate improves seedling emergence and vigour of aged seeds of commercially grown Eucalyptus species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: LS Kandari --- Research Centre for Plant Growth and Development, School of Biological and Conservation Sciences, South Africa MG Kulkarni --- Research Centre for Plant Growth and Development, School of Biological and Conservation Sciences, South Africa J van Staden --- Research Centre for Plant Growth and Development, School of Biological and Conservation Sciences, South AfricaVermicompost leachate (VCL) is a liquid generated by earthworms and microorganisms during the conversion of organic matter into vermicompost. Vermicompost leachate is rich in nutrients and believed to contain both known and unknown plant growth substances, which are beneficial to... -
The effect of bacterial-based biofertilisers and cytokinin on the emergence of sunflower at non-limiting and supra-optimal temperatures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Andries A Nel --- Agricultural Research Council–Grain Crops Institute, South AfricaSubsurface sunflower (Helianthus annuus L.) seedling growth often deteriorates on sandy-textured soils due to supra-optimal temperature levels on the Highveld area of South Africa leading to poor emergence and suboptimum plant population densities. It has been shown that seedling growth... -
Re-imagining decision making: addressing a discrete social driver of HIV/AIDS through the lens of complexity science
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Christopher J Burman --- The Development Facilitation and Training Institute (DevFTI), South Africa Linda Moerschell --- State University of New York at Potsdam, USA Robert Mamabolo --- The Development Facilitation and Training Institute (DevFTI), South Africa Marota Aphane --- The Development Facilitation and Training Institute (DevFTI), South Africa Peter Delobelle --- School of Public Health, South AfricaThis article argues that decision making is a discrete social driver that can be associated with the HIV/AIDS epidemic in the Limpopo province in South Africa. The authors argue that complexity science can inform future research and interventions by presenting... -
Crop rotation and tillage system effects on reducing ryegrass occurrence in spring wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sinovuyo M Nteyi --- Department of Agricultural Management, South Africa Raymond MB Auerbach --- Department of Agricultural Management, South Africa Michael I Ferreira --- Plant Sciences, South Africa Johan Labuschagne --- Plant Sciences, South AfricaUnder the Mediterranean climatic conditions of the Western Cape province, the Swartland region is intensively cropped, producing spring wheat (Triticum aestivum L.), but due to ryegrass competition, yield is reduced. In addition, ryegrass has developed resistance to herbicides. This necessitates... -
Induction behaviour and race and its association with postoperative agitation in paediatric elective surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Euodia Dorothea Swart --- Department of Anaesthetics, South Africa Chantal Rajah --- Perioperative Research Group, Department of Anaesthetics, South Africa Reitze Nils Rodseth --- Perioperative Research Group, Department of Anaesthetics, South AfricaBackground: It has been suggested that preoperative agitation in children may be a risk factor for postoperative delirium and postoperative vomiting. Previous studies have suggested that adult African patients have a lower incidence of postoperative nausea and vomiting, but no... -
Emergence agitation in paediatric patients using sevoflurane and isoflurane anaesthesia: a randomised controlled study
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Trishna Pradeep --- Department of Anesthesiology, Kasturba Medical College, India Jesni Joseph Manissery --- Department of Anesthesiology, Kasturba Medical College, India Madhusudan Upadya* --- Department of Anesthesiology, Kasturba Medical College, IndiaBackground: Emergence agitation (EA) is a well-recognised phenomenon often observed in children following general anaesthesia. The aim of this study was to compare the incidence and severity of EA in the paediatric age group under sevoflurane or isoflurane anaesthesia using... -
Emergence response of sunflower (Helianthus annuus) cultivars to supra-optimal soil temperatures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lize Henning --- Department of Soil, Crop and Climate Sciences, South Africa Gert Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa André A Nel --- Agricultural Research Council–Grain Crops Institute, South AfricaSeedling emergence is a sensitive stage during sunflower (Helianthus annuus L.) establishment. Abiotic stresses, such as high soil temperatures (above 40 °C), can cause delayed emergence resulting in uneven stand and ultimately poor yields. Therefore, the emergence and early growth... -
Effect of short-term maize–cover crop rotations on weed emergence, biomass and species composition under conservation agriculture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Joyful T Rugare --- Department of Agronomy, South Africa Petrus J Pieterse --- Department of Agronomy, South Africa Stanford Mabasa --- Department of Crop Science, ZimbabweRecent advances in crop production have identified crop rotation with cover crops as a key component of sustainable crop production. However, the implementation of conservation agriculture (CA) systems involving crop rotations in Zimbabwe is still minimal partly due to the...