Agriculture, Pêche et Aquaculture
Department of Agriculture, Aquaculture and Fisheries
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  Evaluation of Herbicides for the Control of Borage in Rotational Crops

G.L. Graham1, A. Smith1 and P. Scott2

Abstract: Borage (Borago officinalis) is a potential new crop for New Brunswick producers. Since borage has an indeterminate growth habit, seed drop from the plant before harvest can be an issue. Borage volunteers could become weedy in the following year of the crop rotation. A trial was established near Richmond Corner, New Brunswick to evaluate herbicide control options for borage within potato, cereal, field corn and forage rotational crops. Two application timings were utilized to mimic typical timing used in rotational crops. Glyphosate, rimsulfuron, thifensulfuron/tribenuron and atrazine controlled borage while 2,4-D amine and dicamba suppressed populations. Metribuzin control was effective in early season evaluations but declined as the trial progressed. All other products did not offer consistent control. Borage plants were grown in monoculture within this experiment, so the competition effect from a seeded crop plus suppression from a herbicide, may combine for adequate control. Herbicide control of borage volunteers is possible in typical New Brunswick crop rotations.

1NB Department of Agriculture and Aquaculture, Crop Development Branch, P. O. Box 6000, Fredericton, NB E3B 5H1
2Potato Development Centre, NB Department of Agriculture and Aquaculture, 39 Barker Lane, Wicklow, NB, E7L 3S4

Agriculture, Aquaculture and Fisheries
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