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Difficulty in Controlling Duncecap Larkspur (Delphinium occidentale)
Published online by Cambridge University Press: 12 June 2017
Abstract
Duncecap larkspur was not killed by triclopyr, picloram, or clopyralid applied once at recommended rates. Triclopyr at 1.1, 1.7, 2.2, and 4.6 kg ae/ha applied twice to the same plots in two consecutive years reduced duncecap larkspur density from 29 to 64%. However, the higher rates of triclopyr left 2 plants/m2, an unacceptable level for preventing cattle poisoning.
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- Copyright © 1989 by the Weed Science Society of America
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