Agriculture, Pêche et Aquaculture
Department of Agriculture, Aquaculture and Fisheries
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  Evaluation of Graminicides applied in the Spring of the Sprout Year in Wild Blueberries

G.L. Graham1 and M.J. Melanson1

Parter: Bleuets NB Blueberries

Abstract: Grass weeds continue to be a major issue for blueberry production in New Brunswick. Commonly applied herbicides for grass control include hexazinone, terbacil and fluazifop-p-butyl. The herbicide families for these products have shown resistance in other weed populations, so evaluation of replacement products is prudent if resistance begins to appear within blueberry production. A trial was initiated near Tower Hill, New Brunswick to evaluate registered and new herbicide options for grass control in the sprout year of production. The grass population, consisting of quackgrass (Agropyron repens) and Canada bluegrass (Poa compressa) was highly variable and advanced at the stage of application, which may have influenced the results found. All herbicides tested demonstrated suppression of the species tested. No product offered improved control over the commercial standards. Flucarbazone applied after blueberry emergence caused significant crop injury and yield reductions. Further testing of the herbicides from this trial is warranted, especially for additional grass species.

1NB Department of Agriculture and Aquaculture, Crop Development Branch, P. O. Box 6000, Fredericton, NB, E3B 5H1

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