Canadian Forest Service Publications

Uptake and persistence of the herbicide glyphosate vision in fruit of wild blueberry and red raspberry. 1989. Roy, D.N.; Konar, S.K.; Banerjee, S.; Charles, D.A.; Thompson, D.G.; Prasad, R.P. Canadian Journal of Forest Research 19(7): 842-847.

Year: 1989

Issued by: Pacific Forestry Centre

Catalog ID: 20617

Language: English

CFS Availability: PDF (download), PDF (request by e-mail)

Available from the Journal's Web site.
DOI: 10.1139/x89-128

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Abstract

Field studies on the uptake and persistence of glyphosate (N-(phosphonomethyl)glycine) on wild blueberry (Vaccinium myrtilloides Michx.) and red raspberry (Rubus strigosus Michx.) under boreal forest (Matheson, Ont.) conditions were undertaken. Uptake studies indicated that less than 10% of glyphosate penetrated the fruit in the first 9 h postapplication. Results of the persistence studies showed a gradual decline in residue levels with time. Times to 50% dissipation for glyphosate residue as determined by curvilinear regression analyses were <20 days (95% confidence limit of 8-26 days) and < 13 days (95% confidence limit of 6-14 days) for blueberry and raspberry fruit, respectively. Initial residue levels dissipated to approximately 4 and 6% after 61 and 33 days for the blueberry and raspberry, respectively. Results also showed that at no time during the study period did glyphosate levels in either substrate dissipate to below the maximum permissible residue level (0.01 ppm) as esablished by Health and Welfare Canada.