Effect of fertilizers and adjuvants on quizalofop, sethoxydim, and thiameturon foliar uptake and weed control

Combinations of urea ammonium nitrate (UAN), ammonium polyphosphate (APP), ammonium sulfate (AS), petroleum oil concentrate (POC), and non-ionic surfactant (SURF) were evaluated as postemergence spray additives to improve giant foxtail (Setaria faberi Herrm.) and volunteer corn (Zea mays L.) control by 28 g ai/ha of the ethyl ester of quizalofop $\{({\pm})$-2- (4 ((6-chloro-2-quinoxalinyl)oxy) phenoxy) propanoic acid$\}$ or 56 g/ha sethoxydim $\{$2- (1-(ethoxyimino)butyl) -5- (2-(ethylthio)propyl) -3-hydroxy-2-cyclohexen-1-one$\}$. UAN (9.4 L/ha), APP (9.4 L/ha), and AS (2.8 kg/ha), in general, did not affect grass control. Compared to no adjuvant, SURF (0.25%) and POC (2.3 L/ha) improved grass control; however, POC typically provided more consistent and greater weed control than SURF. The effects of the additives on $\sp{14}$C-quizalofop uptake into corn leaves at 8 h after treatment (HAT) were also determined. Greatest $\sp{14}$C uptake was found with POC (80% uptake) and SURF (18%) additions, while less uptake was observed with treatments containing either no additive, UAN, APP, or AS (8 to 13%).

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agronomy

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Beckett, Thomas Homer

Contributors dc:contributor

• Stoller, Edward W.

• Agriculture, Agronomy

Statement dc:rights

• Copyright 1989 Beckett, Thomas Homer

Language dc:language

eng

Identifier

AAI8924768
(UMI)AAI8924768

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/22849