Marit Almvik
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Marit AlmvikSammendrag
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Marianne Stenrød Marit Almvik Ole Martin Eklo Anne Louise Gimsing Roger Holten Kai Künnis-Beres Mats Larsbo Linas Putelis Katri Siimes Inara Turka Jaana Uusi-KämppäSammendrag
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Marit Almvik Randi Bolli Agnethe Christiansen Ole Martin Eklo Roger Holten Paulien Mulder Gunvor Senneset Marianne StenrødSammendrag
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Plastic mulch films are widely used in agriculture, often in combination with pesticide application. While biodegradable plastic mulch films (BDM) are designed for soil incorporation, their influence on pesticide fate remains poorly understood. We investigated the influence of BDM on the degradation kinetics of four widely used pesticides (boscalid, pyraclostrobin, fluopyram and pyraflufen ethyl) in two agricultural soils under controlled conditions. Pesticides were applied at agronomically relevant doses either directly to soil or adsorbed onto a commercially available PBAT-starch BDM prior to soil incorporation, and pesticides and their relevant metabolites were monitored for 112 days. Adsorption to BDM significantly slowed pesticide degradation for all compounds, increasing degradation half-life DT50 values by factors of 2-26 compared with direct soil application. While degradation pathways were not fundamentally altered, the presence of mulch delayed metabolite formation and prolonged pesticide persistence. Rapid degradation of pyraflufen ethyl led to the accumulation of pyraflufen-ethyl metabolite E 3, a highly persistent multi halogenated metabolite that remains analytically and regulatorily overlooked. BDM itself showed limited mass loss (12 %) over the experimental period, suggesting that pesticide-plastic interactions can persist over environmentally relevant timescales. Overall, this study identifies plastic mulch residues as overlooked modifiers of pesticide persistence and metabolite accumulation in soil, suggesting that plastic-pesticide interactions warrant further consideration in environmental exposure and risk assessment frameworks.
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Poster presented at SETAC 2026. Plastic waste in the environment has been suggested as a potential carrier for azoles and other pesticides, which may contribute to the selection and spread of fungal resistance to azole-based medicines and pesticides. Here, we report results from pesticide analyses of plastic litter collected across Norway. Although many of the 120 plastic samples were weathered and small, we detected pesticides and other contaminants on 36 of the samples, including azoles on 13 of them. Azole concentrations ranged from 2-66 µg/kg plastic litter. The concentrations of the other contaminants ranged from 1 to 731 µg/kg plastic litter, with the highest finding of the herbicide fluroxypyr-meptyl on a piece of hayball plastic wrap. 18 of the litter samples with findings were found in forest habitats, whereas 17 samples were sampled from farmland and grassland. The findings suggest certain pesticides and biocides, including azoles, bind more strongly to plastic than previously assumed, allowing contaminants to persist and spread beyond agricultural areas into natural habitats. This raises concerns about environmental transport of antifungal agents and the potential acceleration of resistance development, posing risks to health and ecosystems.
Divisjon for bioteknologi og plantehelse
Prioritering av plantevernmidler og metabolitter for overvåking av norske jordbruksbekker, basert på kartlegging ved hjelp av bredspektrede screeninganalyser
Divisjon for bioteknologi og plantehelse
Miljørisiko ved plantevernmidler: eksponering og risiko for pollinatorer i jordbruksnære områder (APIStrips)
Prosjektet skal undersøke pollinatorers eksponering for plantevernmidler og nedbrytingsprodukter i norske jordbrukslandskap ved hjelp av APIStrip-metodikk. Dette er en ny, ikke-inngripende metode med adosorberende plater som plasseres i bikuber og som fanger opp flere plantevernmidler enn tradisjonelle prøvetakingsmetoder.
Divisjon for bioteknologi og plantehelse
Diversity Oats - A more sustainable Norwegian oat industry by increased genetic diversity and diversified food products
Divisjon for bioteknologi og plantehelse
REKORN: Can regenerative cultivation methods contribute to reduce the risk of fungal diseases in cereals?
Regenerative agriculture is referred to as a bridge between organic and conventional agriculture and has received increased attention in recent years. Regenerative agriculture focuses on soil health and cultivation measures that can stimulate soil life and plant growth. An improvement in soil health is visualized, among other things, in increased carbon storage in the soil, limited soil compaction and increased microbiological diversity. The methods used to improve soil health within cereal cultivation may include crop rotation, reduced tillage, intercropping, use of catch crops and surface composting where plant residues are mixed into the top-soil layer.
Divisjon for bioteknologi og plantehelse
REKORN: Kan regenerative dyrkingsmetoder bidra til å redusere risiko for soppsjukdommer i korn?
I prosjektet «REKORN» ønsker vi å sammenlikne plantehelsa i korn fra skifter dyrket med ulike dyrkingsmetoder som benyttes innen regenerativt landbruk. Gjennom REKORN ønsker vi å utvikle kunnskap om sammenhengen mellom jordhelse og plantehelse.
Divisjon for bioteknologi og plantehelse
Kunnskap om faktorer som påvirker utvikling av sopp og soppgifter
Prosjektet skal identifisere faktorer som påvirker innhold av soppgifter eller andre naturlig dannede uønskede stoffer i planter, og utvikle kunnskap som kan bidra til å redusere forekomsten av slike gifter.
Divisjon for bioteknologi og plantehelse
Cropdrive
Cropdrive aims to identify a selection of cover crops suitable for use in root vegetable and potato production with beneficial impacts on both soil and plant health, and greenhouse gas exchange.