STP1373

    Spray Droplet Size and Concentration of Metsulfuron-methyl Affects Ethylene Production in Oranges

    Published: Jan 1999


      Format Pages Price  
    PDF (324K) 12 $25   ADD TO CART
    Complete Source PDF (2.8M) 12 $55   ADD TO CART


    Abstract

    Metsulfuron-methyl has been suggested as a new experimental abscission chemical for harvesting Florida citrus fruit. The objective of the research was to determine the effects of spray droplet size and active ingredient (a.i.) concentration on the efficacy of the product.

    ‘Hamlin’ and ‘Valencia’ orange explants (fruit with peduncle) were sprayed using different droplet sizes or dipped in metsulfuron-methyl solution at three concentrations. Treatment solutions also contained adjuvants Kinetic and Buffer Xtra. The treated explants were stored under constant temperature and humidity conditions and assayed at 3, 5, 7, 9 or 10 days. The metsulfuron-methyl induced internal ethylene was measured by gas chromatography and used as response variable.

    Droplet size, a.i. concentration and measurement day had significant effects on ethylene production. Although the response was highly variable, ethylene production tended to increase with droplet size and metsulfuron-methyl concentration. Overall, the variability of response increased at the higher concentrations.

    Keywords:

    metsulfuron-methyl, spray droplet, abscission, gas chromatography, citrus


    Author Information:

    Salyani, M
    Associate Professor of Agricultural Engineering, Associate Professor of Horticulture, and Professor of Horticulture, University of Florida, Citrus Research and Education Center, Lake Alfred, FL

    Burns, JK
    Associate Professor of Agricultural Engineering, Associate Professor of Horticulture, and Professor of Horticulture, University of Florida, Citrus Research and Education Center, Lake Alfred, FL

    Kender, WJ
    Associate Professor of Agricultural Engineering, Associate Professor of Horticulture, and Professor of Horticulture, University of Florida, Citrus Research and Education Center, Lake Alfred, FL


    Paper ID: STP14278S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP14278S


    CrossRef ASTM International is a member of CrossRef.