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Phytotoxicity of pre-emergence herbicides to peach seedlings (Prunus persica)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.F. Lourens --- , Republic of South Africa A.H. Lange --- Extension Weed Scientist, United States of America F.J. Calitz --- , Republic of South AfricaPre-emergence herbicides were tested for relative phytotoxicity to Nemaguard peach seedlings (Prunus persica) in a sand culture. Typical symptoms, phytotoxicity ratings, growth and regrowth parameters were recorded. Diuron, the mixture diuron plus terbacil (1:1), terbutryne and norflurazon were rated phytotoxic... -
Effect of temperature on the severity of pre-and post-emergence damping-off and seedling blight of grain sorghum (Sorghum bicolor)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- , Republic of South Africa F. H.J. Rijkenberg --- Department of Microbiology and Plant Pathology, Republic of South AfricaThe effect of temperature regimes on seedling diseases of grain sorghum (Sorghum bicolor (L.) Moench), was investigated in growth cabinets and for five planting dates in field trials. The period from planting to seedling emergence was increased by low pre-emergence... -
Effect of sugary disease exudates on germination, seedling development and predisposition to seedling diseases of sorghum (Sorghum bicolor)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- Summer Grain Centre, Republic of South AfricaSorghum harvested for seed from Claviceps africana-infected fields becomes coated with sugary disease exudates in which the fungal spores are borne. The role of exudates in the inhibition of seed germination, seedling growth and predisposition to seedling diseases was investigated... -
Ecological factors affecting the early development of seedlings of three Acacia species from Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. Sánchez-Bayo --- Department of Wool and Animal Science, Australia G.W. King --- Department of Wool and Animal Science, AustraliaThree Acacia species from Ethiopia, namely Acacia nubica, A. seyal and A. horrida, were tested for growth and resistance to drought during the establishment phase in glasshouse and laboratory conditions. The experiments showed that each species has different preferences for... -
Effects of aqueous extracts from Artemisia afra parts and soil on seed germination and early seedling development in selected plant species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. Hansen-Quartey --- Department of Agronomy, Republic of South Africa K. Nyamapfene --- , Republic of South Africa S.A. Materechera --- School of Agriculture, Republic of South AfricaAqueous extracts from leaves, stems, roots of the aromatic shrub Artemisia afra and soil on which Artemisia was grown, were used to investigate their inhibitory effects on germination and seedling development of maize (Zea mays), bean (Phaseolus vulgaris) and ryegrass... -
Control of black wattle (Acacia mearnsii De Wild.) seedlings with Garlon herbicide applied by backpack mistblower
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.D. Viljoen --- , South Africa C.W. Stoltsz --- , South AfricaBlack wattle (Acacia mearnsii De Wild) has great economic value for South Africa, but also poses a tremendous threat to our natural ecosystems once it “escapes” from plantations into the surrounding grassland and watercourses, often forming dense, impenetrable thickets that... -
Effect of pine bark goat manure medium on seedling growth and N, P, K concentration of various vegetables
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.T. Mupondi --- Department of Agronomy, Faculty of Science and Agriculture, South Africa P.N.S. Mnkeni --- Department of Agronomy, Faculty of Science and Agriculture, South Africa P. Muchaonyerwa --- Department of Agronomy, Faculty of Science and Agriculture, South AfricaPine bark compost is the medium of choice for seedling growers in South Africa due to its availability, low cost and good physical properties. However, it is acidic, has low electrical conductivity (EC) and nutrient content such that fortification and... -
Shoot morphology and site climate affect re-establishment success of Pinus patula in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell J. Zwolinski N. B. JonesOperational experience has indicated that Pinus patula generally survives poorly on sub-optimal growing sites in South Africa, particularly when planted as cuttings. This observation will become increasingly important as softwood species of genetically selected stock are deployed as cuttings in... -
A root-bound index for evaluating planting stock quality of container-grown pines
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: D.B. South R. G. MitchellPot-binding can adversely affect the performance of container-grown stock. One factor that affects pot-binding is the size of the root system in relation to the size of the container. The aim of this study was to determine if an objective... -
Comparison of the tolerance of Pinus patula seedlings and established trees to infection by Fusarium circinatum
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: R Glen Mitchell --- York Timbers, South Africa Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute, South Africa Emma T Steenkamp --- Forestry and Agricultural Biotechnology Institute, South Africa Jolanda Roux --- Forestry and Agricultural Biotechnology Institute, South Africa Steven Verryn --- Creation Breeding Innovations cc, South Africa Teresa A Coutinho --- Forestry and Agricultural Biotechnology Institute, South AfricaSince the first appearance of Fusarium circinatum in South Africa in 1990, foresters have been challenged with poor field survival of Pinus patula seedlings at establishment. One of the best long-term solutions is to improve the genetic tolerance of P... -
Effect on nursery and field performance of Pinus patula seedlings after inoculation with Fusarium circinatum
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nicoletta B Jones --- Sappi Forests, South Africa Craig M Ford --- Sappi Forests, South Africa Marnie E Light --- Institute for Commercial Forestry Research, South Africa Ryan L Nadel --- Institute for Commercial Forestry Research, South Africa Izette Greyling --- Department of Microbiology and Plant Pathology, Tree Protection Cooperative Programme, Forestry and Agricultural Biotechnology Institute, South Africa Gerda Fourie --- Department of Microbiology and Plant Pathology, Tree Protection Cooperative Programme, Forestry and Agricultural Biotechnology Institute, South Africa Michael J Wingfield --- Department of Microbiology and Plant Pathology, Tree Protection Cooperative Programme, Forestry and Agricultural Biotechnology Institute, South Africa Andrew R Morris --- Sappi Forests, South AfricaFusarium circinatum is an important fungal pathogen of Pinus species. In South Africa, it is the most significant pathogen of Pinus patula seedlings in forestry nurseries where it presents a substantial constraint to productivity and can continue to cause mortality... -
Improved parameters of Pinus greggii seedling growth and health after inoculation with ectomycorrhizal fungi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rebeca Casique Valdés --- Department of Horticulture, Mexico Rosalinda Mendoza Villarreal --- Department of Horticulture, Mexico Fernando Galindo García --- Department of Horticulture, Mexico Susana González Morales --- Department of Horticulture, Mexico Sergio Sanchez Peña --- Department of Parasitology, MexicoPinus greggii Engelm. ex Parl. is an endemic pine of Mexico with notorious adaptability to eroded, shallow and poor soils. It is widely used in reforestation programmes worldwide. The purpose of the present study is to develop an ectomycorrhizal fungi... -
Time of permanence and rooting quality of minicuttings of eucalypt clones
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Glauce Taís de Oliveira Sousa Azevedo --- , Brazil Anderson Marcos de Souza --- , Brazil Gileno Brito de Azevedo --- , Brazil Paulo Eduardo Teodoro --- , Brazil Larissa Pereira Ribeiro Teodoro --- , Brazil José Raimundo Luduvico de Sousa --- , BrazilEstablishing the optimal time for rooting permanence and evaluation of the rooting quality of eucalypt clones allows us to optimise the production process and increase the quality of the seedlings produced. This study aimed to determine the optimal time for... -
The chemistry of the pedoderm – part 2: Dichrostachys cinerea patches and adjacent grassland in the southern Kruger National Park, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony J Mills --- , South Africa Tercia Strydom --- , South Africa Jessica L Allen --- , South AfricaThe small tree, Dichrostachys cinerea, occurs in dense patches within grasslands on gabbro-derived soils in the southern Kruger National Park. It is not known whether soil properties in the grasslands affect tree establishment. As a first step in identifying soil...