Quizalofop and Sethoxydim Activity as Affected by Adjuvants and Ammonium Fertilizers
Autor: | Loren E. Bode, Edward W. Stoller, Thomas H. Beckett |
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Rok vydání: | 1992 |
Předmět: |
0106 biological sciences
Ammonium sulfate biology Ammonium nitrate 04 agricultural and veterinary sciences Plant Science engineering.material Phosphate biology.organism_classification 01 natural sciences 010602 entomology chemistry.chemical_compound chemistry Setaria faberi 040103 agronomy & agriculture engineering Urea 0401 agriculture forestry and fisheries Organic chemistry Ammonium Fertilizer Agronomy and Crop Science Ammonium polyphosphate Nuclear chemistry |
Zdroj: | Weed Science. 40:12-19 |
ISSN: | 1550-2759 0043-1745 |
DOI: | 10.1017/s0043174500056873 |
Popis: | Ammonium fertilizers, petroleum oil concen- trate, and nonionic surfactant were evaluated as post- emergence spray additives to improve giant foxtail and volunteer corn control by 28 g ai ha1 of the ethyl ester of quizalofop or 56 g ha-1 sethoxydim. Additions of 0.25% by vol nonionic surfactant or 2.5% petroleum oil concentrate improved grass control, but additions of 10% urea ammonium nitrate (28-0-0), 10% ammonium poly- phosphate (10-34-0), or 0.1M ammonium sulfate (21- 0-0-24S) did not consistently affect grass control. In laboratory studies with corn, greatest 14C absorption from leaf-applied 14C-quizalofop (8 h after treatment) was found with additions of petroleum oil concentrate (80% absorbed) or nonionic surfactant (18% absorbed), while less absorption was observed with treatments containing either no additive, urea ammonium nitrate, ammonium polyphosphate, or ammonium sulfate (8 to 13% ab- sorbed). Surface tension and droplet size of spray solutions were affected primarily by additions of nonionic surfactant, petroleum oil concentrate, and the formulated herbicides. Solution density, solute potential, pH, and buffering capacity were primarily affected by fertilizer additions. Nomenclature: Quizalofop, (?)-2-(4((6-chloro- 2-quinoxalinyl)oxylphenoxy)propanoic acid; sethoxydim, 2-(1-(ethoxyimino)butyll-5-(2-(ethylthio)propyl)-3- hydroxy-2-cyclohexen-1-one; giant foxtail, Setaria faberi Herrm. #3 SETFA; volunteer corn, Zea mays L. # |
Databáze: | OpenAIRE |
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