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615 results

  1. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 01

    Flue-cured tobacco response to sub-lethal rates of glufosinate

    VANN M.C.(1); JORDAN D.L.(1); FISHER L.R.(2)
    (1) North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.; (2) NC Agriculture Research Service, North Carolina State University, Raleigh, NC, U.S.A.
    Glufosinate is a broad-spectrum, contact herbicide that is currently applied to genetically engineered row crops that tolerate exposure to the chemical, such as cotton (Gossypium hirsutum), maize (Zea mays), and soybean (Glycine max). Flue-cured...
  2. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 04

    Experiences in evaluation of boron needs in North Carolina flue-cured tobacco production: a summary of plant tissue sufficiency data and impacts on yield and quality

    HARDY D.(1); VANN M.C.(2); JERNIGAN C.(3); McGINNIS M.(1); HICKS K.(1)
    (1) Agronomic Division, North Carolina Dept. of Agriculture and Consumer Services, NC, U.S.A.; (2) Crop and Soil Science Department, North Carolina State University, NC, U.S.A.; (3) Helena Chemical Co., U.S.A.
    Boron (B), an essential micronutrient for optimum plant growth, is required in trace amounts (<1.1 kg B ha-1) by flue-cured tobacco. In past decades, boron deficiency in North Carolina has not been prevalent. However, recently, its deficiency has...
  3. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 06

    Auxin herbicide exposure: comparisons of 2,4-D and dicamba drift to flue-cured tobacco

    VANN M.C.(1); JORDAN D.L.(1); FISHER L.R.(2)
    (1) North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.; (2) NC Agriculture Research Service, North Carolina State University, Raleigh, NC, U.S.A.
    Auxin herbicide application has increased in North Carolina due to the commercialization of 2,4-D and dicamba tolerant crops. Flue-cured tobacco is extremely sensitive to both herbicides, yet is commonly grown in close proximity to genetically...
  4. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 10

    Genetic analyses of a major partial disease resistance quantitative trait locus (QTL) in tobacco

    SHI Rui(1); JIN Jing(2); SHEW D.(2); LEWIS R.S.(1)
    (1) Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, U.S.A.; (2) Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, U.S.A.
    Partial resistance of tobacco to plant pathogens controlled by quantitative trait locus (QTL) is desirable in cultivar development programs because of its increased durability. However, mechanisms underlying this type of resistance are difficult to...
  5. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 21

    Impact of genotype and management on nicotine concentration in Burley tobacco

    VANN M.C.; MACHACEK J.L.; CHEEK J.A.; SHORT M.M.; WHITLEY D.S.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    Proposed standards from the US-FDA suggest that nicotine should be lowered to non-addictive concentrations in cigarettes (0.3 to 0.5 mg g-1). One such method for lowering nicotine in finished products is to source leaf material with...
  6. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 23

    Effects of genotype and cultural practices on flue-cured tobacco growth, development, and chemistry

    VANN M.C.; CHEEK J.A.; MACHACEK J.L.; WHITLEY D.S.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    The reintroduction of proposed nicotine standards by the US-FDA warrants further investigations of selected tobacco genotypes and management strategies that may reduce concentrations of the metabolite. To quantify these effects, research was...
  7. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 43

    Cigar wrapper response to nitrogen fertilizer rates in western North Carolina

    SHORT M.M.; VANN M.C.; CHEEK J.A.; MACHACEK J.L.; WHITLEY D.S.
    Department of Crop & Soil Sciences, North Carolina State University, Raleigh, NC, U.S.A.
    Cigar wrapper tobacco is a new and emerging cash crop in western North Carolina. To develop nitrogen (N) fertilizer recommendations, field trials were initiated in 2020 to quantify the impact of N application rate to cigar wrapper tobacco yield,...
  8. CORESTA Meeting, Agronomy/Phytopathology, 2021, Online, AP 49

    Consequences of molecular genetic alteration of leaf nitrate levels on TSNAs, alkaloids, flowering time, and biomass in Burley tobaccos

    DEWEY R.E.(1); BOVET L.(2); GOEPFERT S.(2); CAMPANONI P.(2); LEWIS R.S.(1)
    (1) North Carolina State University, Dept. of Crop and Soil Sciences, Raleigh, NC, U.S.A.; (2) PMI R&D, Philip Morris Products S.A., Neuchatel, Switzerland
    We have previously demonstrated that tobacco-specific nitrosamine (TSNA) levels in Burley tobaccos can be substantially lowered using two distinct molecular genetic techniques designed to impede the plant’s ability to store high levels of free...
  9. TSRC, Tob. Sci. Res. Conf., 2021, 74, abstr. 21

    Characterization of free radicals in cigarette smoke and e-cigarette aerosols by spin-trapping EPR spectroscopy

    DAVIS M.(1); PROBERT C.C.(2); SMIRNOVA T.(2); SMIRNOV A.(2); PRASAD G.L.(3)
    (1) R.J. Reynolds Tobacco Company, Winston-Salem, NC, USA; (2) North Carolina State University, Raleigh, NC, USA; (3) RAI Services Company, Winston-Salem, NC, USA
    E-cigarettes have gained popularity since their introduction in the market; however, only limited data about free radical content of e-cigarette aerosols and the nature of the radicals formed are available in the literature. The overall goal of this...
  10. 49th TWC, Tob. Work. Conf., 2020, abstr. 02

    Tobacco industry changes: global outlook - Panel Discussion

    JAYSON D.(1); BROWN B.(2); SNELL W.(3)
    (1) Tobacco Marketing Association, Princeton Junction, NJ USA; (2) North Carolina State University, Raleigh, NC USA; (3) University of Kentucky, Lexington, KY USA
    Speaker 1:  Darryl Jayson (TMA) "Trends in the Global & US Tobacco Market" Speaker 2:  Blake Brown (NCSU) "Flue-Cured Tobacco Situation and Outlook" Speaker 3:  Will Snell (Uni. Kentucky) "Burley and Dark Tobacco...