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A stem cut and blade delivery method of herbicide application for weed control

Published online by Cambridge University Press:  12 June 2017

Richard L. Wahlers ,
James D. Burton ,
Eleanor P. Maness  and
Walter A. Skroch
Richard L. Wahlers
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609
James D. Burton
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609
Eleanor P. Maness
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609
Walter A. Skroch
Affiliation:
Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609
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Abstract

Greenhouse and field studies were conducted to investigate the responses of container-grown dogfennel, multiflora rose, and purple loosestrife to clopyralid or triclopyr applied to plants from a pruning shear blade. Clopyralid or triclopyr was diluted with water to various concentrations and placed on one side of a pruning shear blade in final volumes of either 1 or 5 μl. The shears were then used to sever and treat stems. Results indicated that 20% triclopyr concentrations in 5-μl total volume (360 μg active) gave ≥ 96% reductions of foliar regrowth in dogfennel, multiflora rose, and purple loosestrife 70, 42, and 56 days after treatment (DAT), respectively. The same delivery rate for clopyralid gave 96% dogfennel control 70 DAT. Subsequent visual ratings with multiflora rose (105 DAT) and purple loosestrife (260 DAT) confirmed that early reductions in biomass were good indicators of long-term control.

Keywords

Clopyralidtriclopyrdogfennel, Eupatorium capillifolium (Lam.) smallmultiflora rose, Rosa multiflora (Thunb.)purple loosestrife, Lythrum salicaria (L.)Burch Wet Blade®cut and applicationpruning shearsEUPCAROSMALYTSA
Type
Weed Management
Information
Weed Science , Volume 45 , Issue 6 , December 1997 , pp. 829 - 832
Copyright
Copyright © 1997 by the Weed Science Society of America 

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