Search Results

190 results

  1. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 01

    Reducing TSNAs in Burley tobaccos through alteration of the N-assimilation pathway

    DEWEY R.E.; LU J.; LEWIS R.S.; ZHANG L.
    North Carolina State University, Raleigh, NC, U.S.A.
    There is great interest in lowering the levels of tobacco-specific nitrosamines (TSNAs) in tobacco products. Because air-cured Burley tobaccos generally contribute a disproportionate share of TSNAs in typical “American blend” cigarettes, reducing...
  2. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 03

    Preliminary investigation of curing environment and TSNA accumulation within barns in dark air-cured tobacco

    RICHMOND M.D.; BAILEY W.A.; PEARCE R.C.
    University of Kentucky, Research and Education Center, Princeton, KY, U.S.A.
    A graduate student project was initiated in 2012 through support from a CORESTA Study Grant to evaluate correlation between curing microenvironments within designated areas of curing barns and TSNA accumulation. Experiments were conducted in barns...
  3. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 04

    Effect of nitrate levels in tobacco leaves on TSNA formation during storage

    SUN Wenshu(1); SHI Hongzhi(1); ZHOU Jun(2); MA Yanjun(2); YANG Huijuan(1); JI H.(3); BAI Ruoshi(2); JACK A.M.(3)
    (1) Henan Agricultural University, China National Tobacco Cultivation & Physiology & Biochemistry Research Center, Key Laboratory for Cultivation of Tobacco Industry, Zhengzhou, P.R. China; (2) Beijing Cigarette Factory of Shanghai Tobacco (Group) Co., Beijing, P.R. China; (3) University of Kentucky, Lexington, KY, U.S.A.
    Nitrogen oxides and alkaloids are the precursors of tobacco-specific nitrosamines (TSNAs). The objective of this study was to determine the effect of nitrate content on TSNA formation during tobacco storage. Two experiments were done: a field...
  4. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 05

    Reproduction of M. arenaria on flue-cured tobacco homozygous for Rk1 and/or Rk2 resistance genes, and possible effects of soil temperature on resistance

    POLLOK J.R.(1,2); JOHNSON C.S.(1,2); EISENBACK J.D.(2); REED T.D.(1)
    (1) Virginia Tech, Southern Piedmont Agriculture Research and Extension Center, Blackstone, VA, U.S.A.; (2) Virginia Tech Dept. Plant Pathology, Physiology, & Weed Science, Blacksburg, VA, U.S.A.
    Meloidogyne incognita has historically been the most significant root-knot nematode species on tobacco (Nicotiana tabacum L.) in Virginia. However, most commercial cultivars now possess the Rk1 resistance gene to races 1 and 3 of M. incognita, and M....
  5. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 06

    Resistant cultivars: a sustainable management option for the tobacco root-knot nematode in Zimbabwe

    MAHERE T.S.; MAKUNDE P.T.; CHINHEYA C.; DIMBI S.
    Tobacco Research Board, Harare, Zimbabwe
    The root-knot nematode (rkn) is an economically important pest in tobacco. Among the effective control measures is the use of resistant cultivars. While the breeding programme at the Tobacco Research Board, Zimbabwe, since 1954 has been aimed at...
  6. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 07

    Comparative tests among nematode agrochemicals and alternative products on Virginia Bright tobacco

    MILLI G.(1); BARGIACCHI E.(2); MIELE S.(2)
    (1) Fattoria Autonoma Tabacchi, Città di Castello, Italy; (2) Consortium INSTM, Firenze, Italy
    There is an increasing interest in reducing the use of agrochemicals in tobacco, to maintain a high integrity of the leaf and accomplish the agro-environmental practices, presently permitting nematode agrochemicals only with a temporary permission....
  7. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 09

    Investigation of black shank resistance and agronomic performance of flue-cured tobacco lines and hybrids carrying the introgressed Nicotiana rustica region, Wz.

    DRAKE-STOWE K.(1); MOORE J.M.(2); BERTRAND P.(2); FORTNUM B.(3); PETERSON P.(3); LEWIS R.S.(1)
    (1) North Carolina State University, Raleigh, NC, U.S.A.; (2) University of Georgia, Tifton, GA, U.S.A.; (3) Clemson University, Florence, SC, U.S.A.
    Black shank, caused by Phytophthora nicotianae, is one of the most important diseases affecting tobacco production in the United States. Growers require genetic resistance to multiple races of P. nicotiane that can be combined into cultivars which...
  8. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 10

    Black shank resistance and leaf surface chemistry of flue-cured breeding lines nearly-isogenic for QTLs of Beinhart 1000 origin

    MA J.M.; STEEDE T.; LEWIS R.S.
    North Carolina State University, Raleigh, NC, U.S.A.
    Black shank (caused by Phytophthora nicotianae) is among the most significant causes of tobacco yield losses in the United States. Host plant resistance is the most effective and cost-efficient means of control. Some sources of resistance have been...