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Cyclic patterns of growth and rubber deposition in guayule Parthenium argentatum. Suggestions for a management programme
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.G. Gilliland --- , J. van Staden --- ,As the natural pattern of development and rubber synthesis in guayule (Parthenium argentatum) is cyclic any treatments to improve growth and rubber production should be synchronized with the normal sequence of events pertaining to growth and metabolism. Starting with 25-week-old... -
Bagworms (Lepidoptera: Psychidae): potential pests of guayule (Parthenium argentatum Gray) plantations in southern Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.R. Appleton --- UN/FRD Research Unit for Plant Growth and Development, Department of Botany, Republic of South Africa J. van Staden --- UN/FRD Research Unit for Plant Growth and Development, Department of Botany, Republic of South AfricaLarvae of the bagworm Eumeta hardenbergi (Bourgogne) (Lepidoptera: Psychidae) are reported for the first time to feed on the leaves and bark of guayule (Parthenium argentatum Gray) plants which were being examined as a potential source of natural rubber in... -
The breaking of seed dormancy of guayule (Parthenium argentatum Gray.) by treatment with gibberellic acid and smoke water solution
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.R. Bekaardt --- , South Africa P.J. Pieterse --- Department of Agronomy, South Africa J.H. Coetzee --- , South Africa G.A. Agenbag --- Department of Agronomy, South AfricaGuayule seed exhibits poor germination due to natural dormancy that can last from six- to twelve months after seed-set. In an attempt to stimulate seed germination, four guayule seed lines (AZ101, AZ-3, N565 and 11591) were treated with smoke water... -
Initial growth potential and biomass production of field established guayule (Parthenium argentatum Gray.) cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.R. Bekaardt --- , South Africa P.J. Pieterse --- Department of Agronomy, South Africa E.M. Reinten --- , South Africa G.A. Agenbag --- Department of Agronomy, South AfricaThe initial growth potential and biomass production of four guayule cultivars under dryland conditions were investigated at different localities in South Africa. Growth (plant survival, height, canopy diameter, stem diameter) and biomass (wet and dry mass) were recorded for (1)... -
Rooting responses of guayule (Parthenium argentatum Gray) cuttings to hormone solutions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.R. Bekaardt --- , South Africa P.J. Pieterse --- Department of Agronomy, South Africa E.Y. Reinten --- , South Africa G.A. Agenbag --- Department of Agronomy, South AfricaVegetative propagation of selected guayule (Parthenium argentatum Gray), with elite qualities of vigorous growth and high latex yield, was Investigated. Rooting responses of guayule cuttings to treatment solutions of indole butyric acid (IBA), naphthalene acetamide (NA) and naphthalene acetic acid...