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1 July 2011 The Impacts of Fertilizer and Hexazinone on Sheep Sorrel (Rumex acetosella) Growth Patterns in Lowbush Blueberry Fields
Karen J Kennedy, Nathan S Boyd, Vilis O Nams, A. Randall Olson
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Abstract

Sheep sorrel is an invasive, creeping perennial weed of lowbush blueberry fields that decreases yields and hinders harvest. Much of the basic phenology of sheep sorrel in blueberry fields is unknown and not documented in peer-reviewed journals. Three levels of fertilizer (0, 20, and 40 kg N ha−1) and two levels of hexazinone (0 and 1.92 kg ai ha−1) were applied to three vegetative-year blueberry fields to determine their effects on root and shoot growth, biomass allocation, and seed production of sheep sorrel plants. Hexazinone efficacy varied widely between sites, but suppressed shoot biomass, achene number and weight, and reproductive biomass, as well as the reproductive ∶ shoot biomass ratio. Fertilizer tended to increase achene number and increased sheep sorrel shoot biomass in the absence of hexazinone, but had no effect on achene weight, root biomass, or reproductive biomass. When fertilizer was applied, sheep sorrel allocated resources to sexual reproduction at the expense of vegetative growth.

Nomenclature: Hexazinone; Velpar; sheep sorrel, Rumex acetosella L.; lowbush blueberry, Vaccinium angustifolium Ait. and Vaccinium myrtilloides Michx.

Weed Science Society of America
Karen J Kennedy, Nathan S Boyd, Vilis O Nams, and A. Randall Olson "The Impacts of Fertilizer and Hexazinone on Sheep Sorrel (Rumex acetosella) Growth Patterns in Lowbush Blueberry Fields," Weed Science 59(3), 335-340, (1 July 2011). https://doi.org/10.1614/WS-D-10-00088.1
Received: 7 June 2010; Accepted: 1 March 2011; Published: 1 July 2011
JOURNAL ARTICLE
6 PAGES


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KEYWORDS
biomass allocation
Broadleaf
perennials
phenology
reproductive biomass
seed production
Velpar
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