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Absorption, Translocation, and Metabolism of Amicarbazone in Annual Bluegrass (Poa annua), Creeping Bentgrass (Agrostis stolonifera), and Tall Fescue (Festuca arundinacea)

Published online by Cambridge University Press:  20 January 2017

Jialin Yu ,
Patrick E. McCullough  and
William K. Vencill
Jialin Yu
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223-1797
Patrick E. McCullough*
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223-1797
William K. Vencill
Affiliation:
Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223-1797
*
Corresponding author's Email: [email protected]
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Abstract

Amicarbazone controls annual bluegrass in cool-season turfgrasses but physiological effects that influence selectivity have received limited investigation. The objective of this research was to evaluate uptake, translocation, and metabolism of amicarbazone in these species. Annual bluegrass, creeping bentgrass, and tall fescue required < 3, 56, and 35 h to reach 50% foliar absorption, respectively. At 72 h after treatment (HAT), annual bluegrass and creeping bentgrass translocated 73 and 70% of root-absorbed 14C to shoots, respectively, while tall fescue only distributed 55%. Annual bluegrass recovered ≈ 50% more root-absorbed 14C in shoots than creeping bentgrass and tall fescue. Creeping bentgrass and tall fescue metabolism of amicarbazone was ≈ 2-fold greater than annual bluegrass from 1 to 7 d after treatment (DAT). Results suggest greater absorption, more distribution, and less metabolism of amicarbazone in annual bluegrass, compared to creeping bentgrass and tall fescue, could be attributed to selectivity of POST applications.

Keywords

Amicarbazoneannual bluegrass, Poa annua L.creeping bentgrass, Agrostis stolonifera L.tall fescue, Festuca arundinacea SchrebEfficacyselectivityturfgrass
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 61 , Issue 2 , June 2013 , pp. 217 - 221
Copyright
Copyright © Weed Science Society of America 

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