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98 results

  1. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 06

    Dark air-cured and dark fire-cured tobacco TSNA levels in response to potassium source and rate

    KEENEY A.B.; BAILEY W.A.
    University of Kentucky, Plant Science Building, 1405 Veterans Drive, Lexington, KY, U.S.A.; University of Kentucky Research and Education Center, 1205 Hopkinsville Street, Princeton, KY, U.S.A.
    Field experiments were conducted to evaluate the effect of potassium fertilizer source and application rate on yield, quality, and tobacco leaf chemistry constituents in dark air-cured (DAC) and dark fire-cured (DFC) tobacco. Field trials were...
  2. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 09

    The effect of farm vehicle exhaust emissions on TSNAs

    FISHER C.R.(1); KINNEY J.(1); JACK A.M.(2)
    (1) University of Kentucky, Department of Plant and Soils, Lexington, KY, U.S.A.; (2) University of Kentucky, Kentucky Tobacco Research and Development Center, KTRDC Building, Lexington, KY, U.S.A.
    Even low concentrations of nitrogenous gases (NOx) produced during combustion in direct-fired flue-cured barns increase tobacco-specific nitrosamines (TSNAs) in the cured leaf. Previous work in France and Kentucky, and in our recent storage study,...
  3. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 14

    Chemically topping Burley tobacco

    RICHMOND M.D.(1); PEARCE R.C.(1); BAILEY W.A.(2)
    (1) University of Kentucky, Department of Plant and Soil Sciences, Lexington, KY, U.S.A.; (2) University of Kentucky Research and Education Center, Princeton, KY, U.S.A.
    The act of topping tobacco (Nicotiana tabacum L.) involves the removal of the terminal bud or inflorescence of the tobacco plant. This practice ordinarily is accomplished by manually removing the top of each tobacco plant in an entire field, which is...
  4. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 32

    Evaluation of various NPK fertilizer formulations applied as side dressing to tobacco in Santa Cruz do Sul region, RS, Brazil

    MOORE J.M.(1); BAFALLUY R.(2); REAL R.(2); CHAVES L.C.S.V.(3)
    (1) University of Georgia, Tifton, GA, U.S.A.; (2) SQM, Alphaville, Barueri, Santana de Parnaíba, SP, Brazil; (3) SANTAGRO, Santa Cruz Agrícola Comercial Ltda, Santa Cruz do Sul, RS, Brazil
    The objective of this research was to evaluate the qualitative and quantitative yield of tobacco (Nicotiana tabacum L.) comparing various formulations of nitrogen-potassium fertilizers applied as sidedress treatments. Six trials were conducted in...
  5. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 38

    Agronomic performance of doubled haploid lines and their use as parental lines of hybrids

    OLIVEIRA E.D.(1); MILLER R.D.(2)
    (1) Alliance One Brasil Exp. de Tabacos Ltda, Vera Cruz, RS, Brazil; (2) University of Kentucky, Kentucky Tobacco Research and Development Center, Lexington, KY, U.S.A.
    Production of doubled haploid lines (DH) is often used to significantly reduce the amount of time required to achieve homozygosity in tobacco breeding populations. The most prominent reported disadvantage with regard to using DH techniques in tobacco...
  6. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 41

    Greenhouse method to screen for resistance to Granville wilt in tobacco

    MARTINEZ-OCHOA N.; MILLER R.D.
    University of Kentucky, Department of Plant and Soils, Lexington, KY, U.S.A.
    Granville wilt is a soilborne disease caused by Ralstonia solanacearum race 1 biovar 1. This bacterial pathogen is very persistent in the soil and is effectively managed with the use of resistant cultivars. Our objective was to incorporate a reliable...
  7. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 43

    Evaluation of dark tobacco transplanting intervals following 2,4-D and saflufenacil herbicide applications

    BAILEY W.A.; RODGERS J.C.; KEENEY A.B.; RICHMOND M.D.
    University of Kentucky Research and Education Center, Princeton, KY, U.S.A.
    Marestail (Conyza canadensis L.) has become a major weed problem in dark tobacco production in western Kentucky due to its persistence in conservation tillage production systems and its tolerance to glyphosate herbicide that is typically used in...
  8. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 50

    Trichome extracts from Nicotiana hybrids - a resource for testing disease/insect resistance

    MIHAYLOVA-KROUMOVA A.B.; WAGNER J.G.
    University of Kentucky, KTRDC, Lexington, KY, U.S.A.
    Glandular trichomes on the surface of species of the Solanaceae family produce sugar esters (SEs) that are species and cultivar-specific. SEs have insecticidal, antibiotic, and hormone-like properties, i.e. SE with medium-chain acyl groups (C7-C12)...