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116 results

  1. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups (Workshop), APW 06

    Modification of tobacco chemical constituents by molecular breeding

    LEWIS R.S.; DEWEY R.E.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    Tobacco plant chemistry affects consumer perception of derived products and also the potential for health risks associated with their use. Some cured leaf chemical components contribute positively to taste and aroma, while others have negative impacts and ...
  2. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 07

    Float water alkalinity adjustment in organic seedling production

    VANN M.C.(1); STEVENS D.A.(1); SHORT M.(1); McGINNIS M.(2)
    (1) North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.; (2) North Carolina Department of Agriculture & Consumer Services – Agronomic Division, Raleigh, NC, U.S.A.
    Float water bicarbonate (HCO 3-) concentration in excess of 2.0 meq/L (100 ppm) can result in stunted, unusable seedlings unless neutralized. In conventional greenhouse systems, sulfuric acid is used for this purpose; however, it is not currently approved ...
  3. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 09

    Chloride application: effects to nutrient assimilation, agronomic performance, and cured leaf chemistry of flue-cured tobacco

    VANN M.C.(1); FISHER L.R.(1); INMAN M.D.(1); HARDY D.H.(2)
    (1) North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.; (2) North Carolina Department of Agriculture & Consumer Services – Agronomic Division, Raleigh, NC, U.S.A.
    Chloride (Cl-) application in excess of 34 kg ha-1 has generally been discouraged in the production of U.S. flue-cured tobacco, due to the negative effects the nutrient can have on cured leaf yield, quality, and smoke sensory. However, fertilizer blending ...
  4. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 16

    Flue-cured tobacco tip leaf yield, quality, value, and color distribution as influenced by cultivar and harvest schedule

    VANN M.C.; FISHER L.R.; INMAN M.D.; WHITLEY D.S.; SEAGROVES R.W.; BARNES K.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    Changes in consumer preference and export strategy strongly influence the buying practices of tobacco leaf dealers and cigarette manufacturers. In current times, a dark-colored (orange to red) style of flue-cured tobacco is preferred over a brighter style ...
  5. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 21

    Quantifying dicamba residue in contaminated sprayers

    INMAN M.D.; VANN M.C.; FISHER L.R.; GANNON T.W.; JORDAN D.L.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    The deregulation of dicamba-tolerant cotton and soybean has increased the potential for dicamba exposure to tobacco through drift or tank contamination. Improper cleaning of sprayer equipment and off-target dicamba exposure can have detrimental ...
  6. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 22

    Field screenings of S-metolachlor for weed suppression in flue-cured tobacco

    CLAPP A.M.; VANN M.C.; FISHER L.R.; INMAN M.D.; SEAGROVES R.W.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    With limited herbicide options and a growing concern to herbicide-resistant weeds, there is a strong need for additional chemical weed control materials in tobacco. S-metolachlor is labeled for use in a variety of agronomic and horticultural crops in the ...
  7. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 23

    Engineering tobacco plants to degrade the potential NNK precursor pseudooxynicotine

    DEWEY R.E.; LEWIS R.S.; SELOTE D.
    North Carolina State University, Dept. of Crop and Soil Sciences, Raleigh, NC, U.S.A.
    Tobacco-specific nitrosamines (TSNAs) form when nitrous oxide species react with tobacco alkaloids. Although most published literature simplistically credits nicotine as being the alkaloid precursor for the potent TSNA NNK [4-(methyl nitrosoamino)-1-(3 ...
  8. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 24

    Downregulation of a putative nitrate transporter gene substantially reduces the accumulation of TSNAs in air-cured tobaccos

    GOEPFERT S.(1); BOVET L.(1); LU J.(2); CAMPANONI P.(1); LEWIS R.S.(2); DEWEY R.E.(2)
    (1) Philip Morris Products S.A. (part of Philip Morris International group of companies), PMI R&D, Neuchâtel, Switzerland; (2) North Carolina State University, Department of Crop Science, Raleigh, NC, U.S.A.
    Air-cured Burley tobacco leaves typically exhibit high levels of nicotine-derived nitrosamine ketone (NNK) and N'-nitrosonornicotine (NNN). It has been previously demonstrated that leaf nitrate accumulation in air-cured tobaccos serves as the source ...
  9. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, APPOST 27

    Critical period for weed control in flue-cured tobacco

    INMAN M.D.; VANN M.C.; FISHER L.R.; JORDAN D.L.
    North Carolina State University, Department of Crop & Soil Sciences, Raleigh, NC, U.S.A.
    Field experiments were conducted to determine the critical period for weed control (CPWC) in flue-cured tobacco. This period consists of two separately measured timings; a critical weed-free period and a critical timing for the weed removal period. ...