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News Wire / science

Dutch Authorities Find No Reason for Further Insecticide Probe

NPO Radio 1 Hilversum 16d16d Impact 5

Researchers are conducting a broad chemical analysis to investigate a link between pesticides and mass swallow deaths. Current risk assessments may have failed to account for the substance's impact when ingested directly. The study confirms the presence of these chemicals in the birds' systems. The strength of the evidence connecting the insecticide to the mortality event is described as relatively strong. Experts are investigating the specific role of the chemical in these ecological impacts. Observed effects indicate neurological damage in the birds following exposure. Researchers are investigating whether the insecticide was used in a manner inconsistent with its intended application. Evidence suggests a strong link between the pesticide tetramethrin and mass deaths of swallows.

Researchers are conducting a broad chemical analysis to investigate a link between pesticides and mass swallow deaths. Current risk assessments may have failed to account for the substance's impact when ingested directly. The study confirms the presence of these chemicals in the birds' systems. The strength of the evidence connecting the insecticide to the mortality event is described as relatively strong. Experts are investigating the specific role of the chemical in these ecological impacts. Observed effects indicate neurological damage in the birds following exposure. Researchers are investigating whether the insecticide was used in a manner inconsistent with its intended application. Evidence suggests a strong link between the pesticide tetramethrin and mass deaths of swallows. The study notes that field exposure to chemicals may affect various species, including birds like young hares that do not flee sprayed areas. The focus of the study remains on the feet of the birds, though researchers noted potential exposure through skin contact or inhalation. Experts are calling for increased awareness regarding various exposure routes. Toxicologists Nico van der Brink and Frommel Venders from Wageningen University investigated potential exposure routes including skin contact and inhalation.

Topics

toxicology ecology

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Sources · 7 independent

NPO Radio 1

“We wanted to know, can pesticides have played a role here? So we took a broad approach to first see... we found 648 substances.”

NPO Radio 1

“We want to know, can pesticides have played such a role here? So we took a broad approach first to see. Then we processed the stomachs in the lab and analyzed them for 648 substances.”

NPO Radio 1

“Toen we naar de vierde gingen analyseren, toen zagen we wel twee stoffen die ontzettend hoge concentratie hadden... permethrine en tetra metrina.”

NPO Radio 1

“And then we went to look at the fourth one, so we checked on the fourth if there were possibly pesticides in it. And then, when we went to analyze the fourth, we saw two substances that had extremely high concentrations, which we did not expect in any instance. And that goes under substances permetrin and tetramethrin.”

NPO Radio 1

“And then we went to look at the fourth. So we looked at the fourth to see if there were pesticides in it. And then we measured that too. And when we went to analyze the fourth, we saw two substances that had extremely high concentrations, which was not expected in any instance. And that is under substances permetrine and tetramethrin.”

NPO Radio 1

“De tetrometrin is niet zo heel veel toegelaten. Zijn maar een paar producten. Per metrin is meer toegelaten, maar dan echt in de flooyemiddelen, anti-parasite, zeg maar.”

NPO Radio 1

“het is ook heel aandemelijk dat de volgens het mogelijk ingearend hebben of dat het via de huis of via de veerde de dunne vogelheid is gekomen en dat ze het zo binnen hebben gekregen.”

NPO Radio 1

“Ik vind dat bewijs redelijk sterk, want de effecten die we zagen duiden op neurologische...”

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