Sublethal effects of the herbicide glufosinate ammonium on crops and wild plants: short-term effects compared to vegetative recovery and plant reproduction.

Ecotoxicology
D Carpenter, Céline Boutin

Abstract

Current guidelines for phytotoxicity testing rely heavily on short-term testing of primarily crop species to predict the sensitivity of non-target, wild plants to herbicides. However, little is known on how plants recover following initial growth inhibitions in standard 14-28 day greenhouse tests conducted for pesticide assessment and registration. The objectives of this study were to assess the ability of plant species to recover (biomass and reproduction) when tested at the juvenile stage (routine regulatory testing), comparing crop and wild species and using the herbicide glufosinate ammonium. Ten crops and 10 wild species were tested with a one-time exposure to glufosinate ammonium in a greenhouse. Half the plants of each species (9 doses × 6 replicates) were harvested 3 weeks after being sprayed (short-term). The remaining plants were harvested several weeks later, coinciding with seed set or natural senescence (long-term). Total aboveground biomass and several endpoints related to crop production and plant reproduction were measured. Calculated IC50 values (dosage that results in a 50% decrease in the biomass of a plant as compared to the untreated controls) based solely on aboveground biomass, for species harvested in th...Continue Reading

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Citations

Oct 12, 2012·Archives of Environmental Contamination and Toxicology·Paula G SmithLoren Knopper
May 2, 2012·Ecotoxicology·Thomas PfleegerDavid Olszyk
Nov 5, 2015·Environmental Toxicology and Chemistry·Richard A Brain, James Hoberg
Jun 28, 2016·Environmental Toxicology and Chemistry·Hanne VercamptAnn Cuypers
Mar 7, 2017·Environmental Toxicology and Chemistry·Richard A BrainMark Ledson
Apr 27, 2017·Environmental Toxicology and Chemistry·David OlszykMilton Plocher
Jun 26, 2017·Ecotoxicology and Environmental Safety·Ferreira María FlorenciaGaletto Leonardo
Feb 27, 2018·Environmental Toxicology and Chemistry·Jette ReegFlorian Jeltsch
Mar 15, 2020·Environmental Toxicology and Chemistry·David J CarpenterChristian Damgaard
Jan 26, 2021·Environmental Toxicology and Chemistry·Solvejg K MathiassenChristian Damgaard

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