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    Early Postemergence Herbicide Weed Control in Onions

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    Author
    Umeda, K.
    MacNeil, D.
    Issue Date
    1999-10
    Keywords
    Agriculture -- Arizona
    Vegetables -- Arizona
    Vegetables -- Herbicides
    
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    Publisher
    College of Agriculture, University of Arizona (Tucson, AZ)
    Journal
    Vegetable: A College of Agriculture Report
    Abstract
    Onions treated with bromoxynil (Buctril7) or oxyfluorfen (Goal7) at the time when the first true leaf was emerging were not injured. No significant onion crop stand reduction occurred from any of the postemergence (POST) treatments. Onion height was not affected by any of the POST treatments through the season. A single application of Goal or Buctril offered up to 7 WAT of very good weed control with excellent crop safety. Onions treated at the typical 2-leaf stage of growth with Buctril or Goal exhibited no significant crop injury. Delayed and reduced control of knotweed (Polygonum aviculare) could have contributed to the decreased onion yield in the herbicide treated onions compared to the handweeded check. Onions in the untreated check were significantly reduced compared to Goal treated onions or the handweeded check.
    Series/Report no.
    AZ1143
    Series P-118
    Collections
    Vegetable Report 1999

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