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17 results

  1. CORESTA Congress, Sapporo, 2012, Agronomy/Phytopathology Groups, AP 17

    Responses of flue-cured tobacco to the fertilisation of sulphur (SO4) in South Africa

    BOSHOFF H.J.
    Agricultural Research Council – Institute for Industrial Crops, Rustenburg, South Africa
    The objective of this study was to investigate the possible benefits of an increased supply of calcium on the yield, quality and chemical composition of flue-cured tobacco, specifically on soils that proportionally have a large amount of extractable ...
  2. CORESTA Meeting, Agronomy/Phytopathology, 2011, Santiago, PPOST 09

    Black shank resistance in air-cured tobacco - South Africa

    DE BEER M.C.; TERBLANCHE J.
    ARC, Agricultural Research Council - Institute for Industrial Crops, Rustenburg, South Africa
    In the South African air-cured tobacco producing regions, black shank, caused by Phytophthora nicotianae var. nicotianae, is a major concern. The control of this disease is based only on crop rotation and chemical control by means of metalaxyl derivates. ...
  3. CORESTA Congress, Edinburgh, 2010, AP 24

    Evaluation of host suitability for meloidogyne species of rotational crops used in tobacco cultivation in South Africa

    VAN BILJON E.R.
    ARC, Agricultural Research Council - Institute for Industrial Crops, Rustenburg, South Africa
    Crop rotation is the single most useful practice that can realistically be applied to annual and short- term perennial crops. It is also not uncommon for a single field to have several nematode species present that could have a limiting effect on a ...
  4. CORESTA Meeting, Agronomy/Phytopathology, Rovinj, 2009, AP 18

    Responses of flue-cured tobacco to the fertilization of phosphorus on sandy soils in South Africa

    BOSHOFF H.J.
    ARC, Agricultural Research Council - Institute for Industrial Crops, Rustenburg, South Africa
    High soil-test values for available phosphorus often seem to be ignored by growers and large amounts of phosphates are generally applied. This causes much concern for it unnecessarily increases costs and also potentially raises the possibility of ...
  5. CORESTA Meeting, Agronomy/Phytopathology, Bucharest, 2003, A 01

    The effect of nitrogen on non-reduced nitrogen and tobacco-specific nitrosamines in dark air-cured tobacco

    BOSHOFF H.J.
    ARC, Agricultural Research Council - Institute for Industrial Crops, Rustenburg, South Africa
    Excessive amounts of nitrogenous fertilisers applied to dark air-cured tobacco are likely to increase the levels of non-reduced nitrogen in the tobacco. Non-reduced nitrogen will, under certain conditions, contribute to the formation of nitrosamines. A ...
  6. CORESTA Meeting, Agronomy/Phytopathology, Bucharest, 2003, P 01

    The use of sunflower as a trap crop to reduce virus incidences in tobacco

    SWANEPOEL A.
    ARC, Agricultural Research Council - Institute for Industrial Crops, Rustenburg, South Africa
    Infection with virus diseases is one of the limiting factors in producing high quality tobacco in South Africa; therefore, control of virus diseases is therefore very important to the tobacco farmer. Currently, we only have resistance to tobacco mosaic ...
  7. CORESTA Congress, New Orleans, 2002, AP 07

    The use of biologically active rotation crop for the suppression of Ralstonia Solanacearum in soils used for tobacco production

    TERBLANCHE J.
    ARC, Agricultural Research Council - Institute for Industrial Crops, Rustenburg, South Africa
    Bacterial wilt, caused by Ralstonia solanacearum (Race 1), is probably the most important bacterial disease of tobacco. The purpose of this study was to identify crops, which aggressively suppress R. solanacearum (Race 1), in their rhizospheres by means ...