Articles by Keyword: Ryegrass Mosaic Virus

Search results for Ryegrass Mosaic Virus

We found 67 results for you
  1. A preliminary survey of viruses in pasture grasses in South Africa

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Little work has been done in South Africa on the incidence of viruses in pasture grasses. The aim of this work was to carry out a survey of virus infections of some of the economically‐important pasture grasses in South Africa...
  2. Epidemiology of ryegrass mosaic virus in South Africa

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The distribution and seasonal occurrence of ryegrass mosaic virus (RMV) in South Africa was determined. Italian ryegrass plants were collected from eight different research stations twice during the growing season in 1990 and 1991. Samples were tested for the presence...
  3. Use of a chimeric transgene construct to confer broad resistance in zucchini (<em>Cucurbita pepo</em> L.) plants against cucurbit-infecting potyviruses occurring in KwaZulu-Natal, South Africa

    Use of a chimeric transgene construct to confer broad resistance in zucchini (<em>Cucurbita pepo</em> L.) plants against cucurbit-infecting potyviruses occurring in KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The frequent identification of cucurbit-infecting viruses across the province of KwaZulu-Natal (KZN) in South Africa necessitates developing effective methods of controlling these diseases. Putative transgenic baby marrow (Cucurbita pepo L.) plants resistant to Zucchini yellow mosaic virus (ZYMV), Moroccan watermelon...
  4. The relationship between the nitrogen and nitrate content and nitrate toxicity potential of <em>Lolium multiflorum</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The interrelationships between the nitrate‐N and nitrogen content and dry matter yield of Midmar ryegrass (Lolium multiflorum cv. Midmar) were investigated. Data were collected from N fertility trials, from two seasons (1985 and 1987) on four soil sites (Metz, Griffin,...
  5. The effect of source of nitrogen on the dry matter yield, nitrogen and nitrate‐N content of <em>Lolium multiflorum</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Three sources of N fertilizer (urea, limestone ammonium nitrate (LAN) and ammonium sulphate) showed no consistent significant trends in terms of the dry matter yield and nitrogen or nitrate‐N content of midmar ryegrass. Ammonium sulphate was found to acidify the...
  6. An evaluation of the problem of volunteer ryegrass in seed production

    An evaluation of the problem of volunteer ryegrass in seed production

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    This investigation was conducted to establish the degree and means of eliminating unwanted volunteers of Lolium multiflorum from fields used for seed production of a cultivar of the same species. This information is necessary in order to make recommendations with...
  7. An assessment of cassava African mosaic disease in South Africa and Swaziland

    An assessment of cassava African mosaic disease in South Africa and Swaziland

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A preliminary assessment of the distribution of African mosaic disease (AMD) in cassava in Natal, Transvaal and Swaziland suggests that at present the threat to commercial plantings in Natal has been contained through (i) commercial establishment of cassava in an...
  8. Resistance of South African maize hybrids to maize streak virus

    Resistance of South African maize hybrids to maize streak virus

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Data from maize cultivar trials at Vaalharts over a five-year period were used to evaluate the level of resistance to maize streak virus (MSV) in commercial maize hybrids, and to determine the potential value of such resistance. Maize hybrids presently...
  9. Resistance in wheat to maize streak virus

    Resistance in wheat to maize streak virus

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sixteen spring wheat cultivars were screened for resistance to maize streak virus (MSV) in the eastern Transvaal where the disease often attains epidemic proportions in wheat and maize. In this area four cultivars were resistant, two were susceptible and ten...
  10. Soil water use and rooting depth of Italian ryegrass (<em>Lolium multiflorum</em> Lam.) in a small plot experiment

    Soil water use and rooting depth of Italian ryegrass (<em>Lolium multiflorum</em> Lam.) in a small plot experiment

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Italian ryegrass is planted mainly under irrigation in the summer rainfall region of South Africa. Irrigation practices are often based on the assumption that Italian ryegrass has an extremely shallow root system. A small plot experiment was conducted to ascertain...