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Clopyralid Persistence in Spearmint (Mentha cardiaca) Hay Injures Potato (Solanum tuberosum)
Published online by Cambridge University Press: 12 June 2017
Abstract
Spent spearmint hay from mint that had been treated with clopyralid in the fall or spring injured ‘Russet Burbank’ potato planted into loamy sand soil amended with 50 g hay/kg soil. Lowering the ratio of mint hay to soil from 50 to 3.1 g/kg reduced, but did not eliminate, the injury to potato. Potato was inured by clopyralid at concentrations as low as 3 ppbw in soil.
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