Effect of Granular Norflurazon (Zorial 5G) on Alfalfa Establishment in Parker Valley
Affiliation
La Paz County Cooperative Extension, University of Arizona, Parker, AZDepartment of Plant Sciences, University of Arizona, Tucson, AZ
Issue Date
1998-10Keywords
Agriculture -- ArizonaGrain -- Arizona
Forage plants -- Arizona
Alfalfa -- Arizona
Alfalfa -- Weed control
Metadata
Show full item recordAbstract
The tolerance of seedling alfalfa to norflurazon applied at planting or 6, 14, or 20 weeks after planting was evaluated in Parker Valley in the spring of 1998. At each application date, rates of 0, 1.5, 2, 3, or 4 lbs a.i./A of norflurazon formulated as a 5% sand granule (Zorial 5G) were applied using a ground driven Valmar granule applicator. Zorial 5G at rates ranging from 1.5 to 4.0 lbs a.i./acre applied no earlier than 6 weeks after planting had no effect on alfalfa seedling emergence and stand establishment. These applications also did not reduce the fresh weight of foliage harvested on July 1, 1998. For effective spring and summer purple nutsedge control, the first spring application of Zorial 5G should not be any earlier than 14 weeks after planting alfalfa or late January which ever is later. In a newly planted alfalfa field prone to high purple nutsedge weed pressure, spring Zorial 5G application rates ranging from 1.5 to 2.0 lbs a.i. /acre should be considered.Series/Report no.
AZ1059Series P-114