Articles by Author: Frikkie J Calitz

Search results for Frikkie J Calitz

We found 11 results for you
  1. Efficacy of fungicides, plant resistance activators and biological control agents against guava wilt disease caused by <em>Nalanthamala psidii</em>

    Efficacy of fungicides, plant resistance activators and biological control agents against guava wilt disease caused by <em>Nalanthamala psidii</em>

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Guava wilt disease (GWD) caused by the fungus Nalanthamala psidii remains a major constraint to guava production in South Africa and South-east Asia. In the current study, chemical and biological products as well as plant resistance activators were evaluated for...
  2. Inoculum availability and infection patterns of Fusarium mangiferae, the causal agent of mango malformation in South Africa

    Inoculum availability and infection patterns of Fusarium mangiferae, the causal agent of mango malformation in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Mango malformation, caused by Fusarium mangiferae, is a serious disease of mango in South Africa, causing severe economic losses annually. The occurrence of conidia of F. mangiferae on malformed inflorescences and leaves and the timing of airborne infections were studied...
  3. Integrated control of mango blossom malformation in South Africa

    Integrated control of mango blossom malformation in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Mango malformation disease (MMD) is a serious disease worldwide, causing severe economic losses annually. In South Africa, recommendations for managing MMD are to break out malformed inflorescences when clearly visible. Despite these recommendations, high incidences of MMD were reported during...
  4. Assessing legumes indigenous to South Africa, Lesotho and Swaziland for their pasture potential

    Assessing legumes indigenous to South Africa, Lesotho and Swaziland for their pasture potential

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    In contrast to the exploration and use of southern African grass plant genetic resources over the past century, only a few indigenous legume species are currently used as forages, notwithstanding the vast untapped legume diversity available in southern Africa. The...
  5. Pruimonderstamme: Verdere evaluaste van plaaslik-geteelde klone

    Pruimonderstamme: Verdere evaluaste van plaaslik-geteelde klone

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Drie-en-twintig plaaslik-geteelde pruimonderstamseleksies is met virusvrye, klonale Marianna, virusbesmette Marianna en perskesaailing vergelyk. In teenstelling met perskesaailing wat oorwegend Kakamas en Du Plessis is, word hierdie seleksies vegetatief vermeerder. Kumulatiewe opbrengs, stamomtrek en opbrengsdoeltreffendheid is as maatstawwe vir vergelyking gebruik...
  6. Phytotoxicity of pre-emergence herbicides to peach seedlings (<em>Prunus persica</em>)

    Phytotoxicity of pre-emergence herbicides to peach seedlings (<em>Prunus persica</em>)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Pre-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...
  7. The effect of poor quality seed and various levels of grading factors on the germination, emergence and yield of wheat

    The effect of poor quality seed and various levels of grading factors on the germination, emergence and yield of wheat

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    High quality seed is essential for establishing productive stands of wheat. Seed should have, amongst others, a high germination percentage, be free of seed borne diseases and should not contain any weed seed. Protein content (PC), hectolitre mass (HLM) and...
  8. INVOEGING AS VERTAALSTRATEGIE VIR OORKLANKINGSVERTALING: 'N VERGELYKING VAN DIE AFRIKAANSE EN DUITSE KLANKBANE VAN ISTVAN SZABO SE <em>MEPHISTO</em>

    INVOEGING AS VERTAALSTRATEGIE VIR OORKLANKINGSVERTALING: 'N VERGELYKING VAN DIE AFRIKAANSE EN DUITSE KLANKBANE VAN ISTVAN SZABO SE <em>MEPHISTO</em>

    Item type: Journal Article • Journal: South African Journal of Linguistics
    Die oorklankingsvertaler kom voor spesifieke uitdagings te staan waarvan ekstra-linguistiese faktore soos lipsinchronisasie van die doeltaal met die sigbare mondbewegings van karakters die belangrikste is. Lipsinchronisasie dwing die vertaler soms tot invoeging, skrapping en vervanging. In hierdie voorlopige ondersoek word...
  9. Spatial and temporal population dynamics of rodents in three geographically different regions in Africa: Implication for ecologically-based rodent management

    Spatial and temporal population dynamics of rodents in three geographically different regions in Africa: Implication for ecologically-based rodent management

    Item type: Journal Article • Journal: African Zoology
    As part of a three-year study to develop ecologically-based rodent management (EBRM) in southern Africa, a capture–mark–recapture study was carried out in Tanzania, Namibia and Swaziland to establish the demographic patterns and population dynamics of rodents. Two study grids were...