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    Lint Yield, Earliness and Pink Bollworm Resistance of Cottons Treated with Ethephon and Untreated

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    Author
    Wilson, F. Douglas
    Flint, Hollis M.
    Bariola, Louis A.
    Issue Date
    1988-03
    Keywords
    Agriculture -- Arizona
    Cotton -- Arizona
    Cotton -- Insect investigations
    
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    Publisher
    College of Agriculture, University of Arizona (Tucson, AZ)
    Journal
    Cotton: A College of Agriculture Report
    Abstract
    An early -maturing, nectariless, okra-leaf germplasm line of cotton, Gossypium hirsutum L., designated WC-12NL, was compared with a full- season, nectaried, regular -leaf cultivar, 'Deltapine 61' (DPL-61) over two locations, Maricopa, Arizona (AZ) and Brawley, California (CA), and two seasons, 1986 and 1987. Half of each plot was treated with ethephon ( =Prep) when the crop was approximately 60% open. Lint yields were higher in WC-12NL than in DPL-61 at AZ, but not at CA. WC-12NL was earlier maturing than DPL-61, but the difference was greater in untreated than in ethephon-treated plots and at AZ than at CA. From 33 to 67% less insecticide was needed to control pink bollworm, Pectinophora gossypiella (Saunders), on WC-12NL than on DPL-61. Pink bollworm infestations were also significantly lower in bolls of WC-12NL.
    Series/Report no.
    370072
    Series P-72
    Collections
    Cotton Report 1988

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