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18 results

  1. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 97, A9

    Lowering the nicotine content of flue-cured tobacco cultivars in South Africa

    VAN TONDER C.S.M.; KRUGER J.; DIPPENAAR M.C.
    Tobacco and Cotton Research Institute, Soil and Crop Science Division, Rustenburg, South Africa
    The nicotine content of flue-cured tobacco produced in the RSA is determined by factors suchas soil fertility, climatic conditions and production practices. The nicotine content of the leaf cannot be reduced dramatically without a detrimental effect on ...
  2. CORESTA Meeting, Agronomy/Phytopathology, Montreux,1997, AP55

    Integrated nematode control on tobacco in South Africa: present status

    BOTHA-GREEFF M.S.; VAN BILJON E.R.; DIPPENAAR M.C.; VORSTER T.B.
    Tobacco and Cotton Research Institute, Rustenburg, South Africa
    A strategy for nematode research with the objective of eventual integrated control of nematodes on tobacco has been implemented at TCRI. Long- and short-term research objectives for laboratory, greenhouse and field research have been identified and are ...
  3. CORESTA Meeting, Agronomy/Phytopathology, Oxford, 1995

    The effect of genetic resistance against meloidogyne spp. in tobacco on nematode populations

    BOTHA-GREEFF M.S.; VAN BILJON E.R.; CLAASSEN A.
    ARC, Tobacco & Cotton Research Insitute, Rustenburg, South Africa
    An integrated nematode control research strategy, with the accent on genetic resistance, crop rotation and chemical control, is presently followed at TCRI. Promising tobacco breeding lines with resistance or tolerance against Meloidogyne javanica and M. ...
  4. CORESTA Meeting, Agronomy/Phytopathology, Oxford, 1995

    Using changes in electrical conductivity and sucrose content of flue-cured tobacco leaves to assess ripeness more objectively

    NOLTE C.R.
    Tobacco and Cotton Research Institute, Rustenburg, South Africa
    No objective method to measure ripeness of flue-cured tobacco exists at this stage. Leaf ripeness is still assessed in a subjective manner according to leaf colour. Several factors, such as water logging, under fertilization and cultivar differences can ...
  5. Bull. Spec. CORESTA Congress, Harare 1994, p. 23, A 14

    Comparing drip and sprinkler irrigated flue-cured tobacco in South Africa

    DIPPENAAR M.C.; BARNARD C.; PRETORIUS T.; STEENKAMP C.J.
    Tobacco and Cotton Research Institute, Rustenburg, South Africa
    Low yield and poor leaf quality from tobacco under sprinkler irrigation can often be ascribed to poor management, faulty design and bad maintenance of equipment. Many crops as well as tobacco responded well to the high moisture regime provided by drip ...