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115 results

  1. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 100, A13

    Short and long-term effects of applying lime in fractions of the full required amount on soil features and on yield and quality of tobacco

    MANDALA L.W.
    ARET, Agricultural Research and Extension Trust, Lilongwe, Malawi
    The fact that most soils in Malawi are acidic has been known for some time and such soils have detrimental effects on tobacco production. Correcting soil acidity is achieved by proper liming regimes with the aim of increasing soil pH and the...
  2. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 121, P1

    Population dynamics and race structure of the black shank pathogen in North Carolina tobacco fields

    SHEW H.D.; SULLIVAN M.; MELTON T.A.
    North Carolina State University, Dept. of Plant Pathology, Raleigh, NC, USA
    Black shank, caused by the soilborne pathogen Phytophthora parasitica var. nicotianae , is an important root and crown rot disease of flue-cured and Burley tobacco in North Carolina. The most common race of the pathogen in both tobacco types is...
  3. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 124, P4

    Diversity of Ralstonia solanacearum in the Southeastern United States

    ROBERTSON A.E.; FORTNUM B.A.; KLUEPFEL D.A.; WOOD T.C.
    Clemson University, Dept. of Plant Pathology and Physiology, Pee Dee REC, Florence, SC, USA.
    Bacterial (Granville) wilt, caused by Ralstonia solanacearum , is a major disease of tobacco in both North and South Carolina. In contrast, Granville wilt rarely occurs on tobacco in Georgia, Florida and Virginia. This difference was noted over...
  4. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 126, P6

    Study on the predictive models of tobacco virus disease transmitted by aphids

    WANG Fenglong; QIAN Yumei; SHI Jiao; WANG Jinbo; CHEN Dexin; ZHAO Liming; MU Jianmin
    Qingzhou Tobacco Research Institute of CNTC, Qingzhou, Shandong, China
    In China, CMV, PVY and TEV transmitted by aphids have seriously impaired tobacco production in most tobacco-growing areas. In this paper, several predictive models, concerning aphid-transmitted tobacco virus disease, were formulated. Based on the...
  5. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 127, P7

    Characterization of PVY strains occurring in Poland and Hungary, and comparisons with foreign strains

    DOROSZEWSKA T.; FISHER C.R.
    Institute of Soil Science and Plant Cultivation, Dept. of Special Crops, Pulawy, Poland.
    The necrotic strain of Potato virus Y (PVY), causing brown venial necrosis of tobacco is an economically important in Poland, but even more serious in Hungary. Other important crops infected include potatoes, which is most likely the major source of...