Search Results

85 results

  1. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 04

    Contributions to the study of gall wasp occurrence in Eucalyptus woodlots in southern Brazil

    ROESCH F.(1); FEUERBORN M.(1); KOEHLER A.(2); RAUBER M.(2); FARIAS J.(3); WELTER C.A.(3); TEIXEIRA D.S.(3)
    (1) Japan Tobacco International (JTI), Santa Cruz do Sul, RS, Brazil; (2) Universidade de Santa Cruz do Sul (UNISC), Laboratory of Entomology, Santa Cruz do Sul, RS, Brazil; (3) Universidade Federal de Santa Maria (UFSM), Centro de Pesquisas Florestais, Campus Universitário, Santa Maria, RS, Brazil
    Firewood from Eucalyptus spp. is the main source of energy for tobacco curing in South Brazil. Leptocybe invasa Fisher & Lasalle, 2004 (Hymenoptera: Eulophidae) is a gall inducing wasp species that causes damage to eucalyptus plantations and...
  2. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 49

    Potential alternative control for Ephestia spp. using parasitoid wasps

    KÖHLER A.(1); PEZZINI C.(1); ROESCH F.(2); FEUERBORN M.(2)
    (1) Universidade de Santa Cruz do Sul (UNISC), Laboratory of Entomology, Santa Cruz do Sul, RS, Brazil; (2) Japan Tobacco International (JTI), Santa Cruz do Sul, RS, Brazil
    Different practices are already used to control lepidopteran pests in stored tobacco, mostly including chemical or physical practices, preventive or disinfesting. Biological methods, used more frequently in tobacco field sites, are not used yet in...
  3. CORESTA Congress, Sapporo, 2012, Agronomy/Phytopathology Groups, AP 20

    Characterisation and comparison of French and Brazilian potato virus Y (PVY) isolates collected from PVY-susceptible or -resistant tobacco plants carrying the recessive resistance gene va

    LACROIX C.(1,2*a) ; GLAIS L.(3); KERLAN C.(1); CHARLIER C.(4); JANZAC B.(1,2); LORENCETTI C.(5); MORNET F.(6); CAILLETEAU B.(2); VERRIER J-L.(2); JACQUOT E.(1*b)
    (1) INRA-Agrocampus Ouest-Université Rennes1, UMR1349 IGEPP (Institute of Genetic, Environment and Plant Protection), Le Rheu, France; (2) Imperial Tobacco Group, SEITA, Institut du Tabac, Bergerac, France; (3) FNPPPT (Fédération Nationale des Producteurs de Plants de Pomme de Terre), Paris, France; (4) Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil; (5) Alliance One Brasil Exportadora de Tabacos Ltda, Vera cruz, RS, Brazil; (6) ANITTA, Bergerac, France
    Improved tobacco cultivars possessing alleles of the “va” recessive resistance gene have been deployed worldwide to mitigate consequences of potato virus Y (PVY) infections. Unfortunately, necrotic PVY symptoms were reported, suggesting that PVY is...
  4. CORESTA Meeting, Agronomy/Phytopathology, 2011, Santiago, AP 23

    Spatial distribution and impact of adjacent vegetation on families of parasitic Hymenoptera associated with organic tobacco in Santa Cruz do Sul, RS, Brazil

    DORFEY C.(1); KÖHLER A.(2); SCHOENINGER K.(2)
    (1) JTI Kannenberg Comércio de Tabacos do Brasil Ltda, Brazil; (2) University of Santa Cruz do Sul (Unisc), Brazil
    The objectives of the research were to assess the fauna of Hymenoptera parasitoids associated with tobacco under organic management, to verify its spatial distribution within the growing area and to assess the impact of the presence of adjacent...
  5. CORESTA Meeting, Agronomy/Phytopathology, Rovinj, 2009, AP 17

    Characterization of TSNA content in cured leaf of dark fire-cured and dark air-cured tobaccos grown in KY and TN, U.S.A. in 2006-2008

    NIELSEN M.T.; BENNETT C.B.; FUFA S.; HELTSLEY D.; FINCH J.
    U.S. Smokeless Tobacco Manufacturing Co., Nashville, TN, USA
    Tobacco specific nitrosamines (TSNA's) found in the cured leaf of dark tobaccos are formed by the nitrosation of secondary amine alkaloids during post-harvest stages of leaf production. While previous research has identified many factors, including...
  6. CORESTA Congress, Shanghai, 2008, AP 05

    Down-regulating the nicotine demethylase gene lowers NNN content levels with little or no effect on field performance of Burley and dark tobaccos

    NIELSEN M.; XU Dongmei; LUSSO M.; DAVIS G.; SHEN Yanxin; BAILEY A.; HART F.; CUI Mingwu; NORMAN D.
    U.S. Smokeless Tobacco Co., Winchester, KY, USA
    Down-regulating nicotine demethylase (ND) activity in tobacco using RNAi interference mechanisms or by mutating the ND gene reduces nornicotine formation and should lead to lowering N-nitroso-nornicotine (NNN) levels in cured leaf. Over the past two...
  7. CORESTA Congress, Shanghai, 2008, AP 06

    Reducing nicotine conversion: stability of RNAi-mediated and mutant down-regulation of nicotine demethylase

    XU Dongmei; SHEN Yanxin; LUSSO M.; BAILEY A.; NORMAN D.; DAVIS G.; HART F.; CUI Mingwu; NIELSEN M.
    U.S. Smokeless Tobacco Co., Winchester, KY, USA
    Nornicotine, a secondary alkaloid formed from the demethylation of nicotine in tobacco, is the precursor of N'-nitrosonornicotine (NNN), a TSNA formed by nitrosation during tobacco curing. In earlier studies, we reported that GMO (RNAi) and non-GMO...