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Translocation of Nicosulfuron and Dicamba in Hemp Dogbane (Apocynum cannabinum)

Published online by Cambridge University Press:  20 January 2017

Pablo A. Kalnay  and
Scott Glenn
Pablo A. Kalnay
Affiliation:
Natural Resource Sciences and Landscape Architecture Department, University of Maryland, College Park, MD 20742
Scott Glenn
Affiliation:
Natural Resource Sciences and Landscape Architecture Department, University of Maryland, College Park, MD 20742
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Abstract

Absorption and translocation of nicosulfuron and dicamba applied alone and combined was studied in 25-cm-high hemp dogbane originating from lateral roots that had overwintered. Absorption of 14C-nicosulfuron by hemp dogbane was not affected by applications of 70 g ai/ha unlabeled dicamba. Upward translocation of 14C-nicosulfuron in hemp dogbane was 86% greater 6 d after treatment (DAT) when dicamba was tank mixed with nicosulfuron, compared to nicosulfuron applied alone. Combinations of nicosulfuron plus dicamba increased translocation of nicosulfuron to hemp dogbane crown and roots 237 and 130%, 1 and 6 DAT, respectively, compared to nicosulfuron applied alone. Absorption of 14C-dicamba by hemp dogbane was not affected by the addition of 31 g ai/ha nicosulfuron. Upward translocation of dicamba in hemp dogbane was 42% greater 6 DAT for nicosulfuron plus dicamba compared to dicamba applied alone. Increased hemp dogbane control with nicosulfuron plus dicamba compared to either herbicide applied alone can be explained by enhanced translocation of both herbicides.

Keywords

Dicambahemp dogbane, Apocynum cannabinum L.#3 APCCAAbsorptioninteractiontank mixtureAPCCADATdays after treatment
Type
Research Article
Information
Weed Technology , Volume 14 , Issue 3 , September 2000 , pp. 476 - 479
Copyright
Copyright © Weed Science Society of America 

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