1. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 61, AP11

    The tobacco breeding program of Institut du Tabac (SEITA, ALTADIS) : methods, results and future prospects

    VERRIER J.L.; ANO G.; TANCOGNE J.; VIDAL B.; DELON R.
    Altadis - Institut du Tabac, Bergerac, France
    Tobacco breeding at Tobacco Institute of Bergerac started with TMV resistance, then increased with the blue-mold epidemic of years 60, which necessitated creation and release of new, blue-mold resistant varieties. In order to diversify the French...
  2. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 67, AP17

    Biochemical changes in ß-cryptogein - elicited tobacco: a possible basis of induced resistance

    EDREVA A.; BLANCARD D.; DELON R.; BONNET P.; RICCI P.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    ß-cryptogein, a proteinaceous elicitor from the phytopathogenic fungus Phytophthora cryptogea , is known to induce leaf necrosis in tobacco and non-specific resistance (expressed in the perinecrotic leaf area) against a wide range of tobacco...
  3. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 141, A32, ISSN.0525-6240

    Study of cytoplasmic sterile male hybrids (CMS)-cytoplasm derived from Nicotiana goodspeedii

    PALAKARTCHEVA M.; YANTCHEVA A.; DELON R.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria; Institut de Tabac de Bergerac, France
    The aim of our research was the creation of cytoplasmic male hybrids (cytoplasm derived from N. goodspeedii. Sterile male lines with) sterile male cytoplasm from N. goodspeedii were used on the one hand on the other, the French varieties BB30 and...
  4. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 161, P04, ISSN.0525-6240

    Pathogenicity of North Carolina and French isolates of Chalara elegans and comparison of tobacco varieties resistant to black root rot

    SHOEMAKER P.B.; DELON R.
    North Carolina State University, Fletcher, NC, USA and SEITA/ITB, France
    Growth chamber and field experiments on tobacco black root rot (BRR) were conducted at the Institut du Tabac, Bergerac, France in summer 1989. Pathogenicity of 14 isolates of Chalara elegans, collected from 7 fields in North Carolina (NC) and 7...
  5. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 166, P09, ISSN.0525-6240

    Comparison of two new methods for measuring the resistance of tobacco to Phytophthora parasitica var. nicotianae usable in selection

    MAIA N.; DELON R.; TRENTIN F.; BONNET P.
    INRA, Station de Botanique et de Pathologie Végétale, Antibes, France
    Two methods for inoculating tobacco with the black shank agent Phytophthora parasitica var. nicotianae (Ppn) : the inoculation of a population of young plants in the cotyledon stage ("cotyledons test") and the inoculation of young plants at the two...
  6. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 168, P11, ISSN.0525-6240

    Involvement of free radicals and superoxide dismutase in the blue mold resistance of tobacco

    EDREVA A.; KARJIEVA R.; COUSSIRAT J.C.; DELON R.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The concentratio of free unpaired electrons (corresponding to the free radicals level) was investigated in tobacco seedlings during blue mold pathogenesis. The method of electron paramagnetic (spin) resonance was applied. The activity of the...
  7. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 183, PP01, ISSN.0525-6240

    Biochemical study of tobacco tested under"test-cotyledon"conditions : Effects of magnesium, reactions of plants resistant and sensitive to Peronospora tabacina. Cytochemical study of Callose

    GEORGIEVA I.D.; DELON R.; COUSSIRAT J.C.; EDREVA A.M.
    Institute of Genetics, Sofia, Bulgaria; Institut Expérimental du Tabac, Bergerac, France
    Tobacco obtained under cotyledon test conditions was inoculated with P. tabacina Adam conidia. The presence of callose deposits was detected in the cell walls of three genotypes. In the sensitive type, there was no formation of callose papillae in...
  8. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 185, PP03, ISSN.0525-6240

    Survey of pests and diseases of tobacco and chemicals used. Part. 2. Main chemicals used on tobacco

    DELON R.; HILL D.; PAPENFUS H.; TANCOGNE J.
    SEITA, Institut du Tabac France - Philip Morris, USA - Rothmans Int., UK
    This 2n part of the survey made in 1987, summarize the informations collected on the main pesticides used on tobacco in 50 tobacco growing countries, their frequency of use, field of application, the pest and diseases controlled, and also the maximum...