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
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