Insecticiden

Äcker in Europa sind häufig durch einen Mix verschiedener Pflanzenschutzmittel belastet. Das zeigt eine neue Studie von Forschern der niederländischen Landwirtschafts-Universität Wageningen. „Das Vorhandensein von Rückstände gleich mehrerer unterschiedlicher Pestizide im Boden ist offenbar eher die Regel als die Ausnahme“, heißt es in der Studie.

Scientists said they’ve found that exposure to the neonicotinoid pesticide imidacloprid produces complex changes in the social behaviors and activities of bumblebees – a very bad thing for creatures who rely on their colonies to survive. Bumblebees exposed to imidacloprid became less social and spent less time together. The bees also spent less time nursing larvae, foraging and constructing the wax canopy which insulates and regulates the temperature of the hive.

Four water supplies, one in Kilkenny, two in Limerick and one in Longford currently have a level of pesticides above the set EU standard, according to Irish Water. The pesticide that is being detected most frequently in drinking water supplies in Ireland is an herbicide called MCPA. This herbicide is in many products used to control thistle, dock and rush. This increase is because products containing MCPA are being used to control weeds on hard surfaces, in gardens, on farms or in forestry.

We measured uptake and dissipation of soil-applied imidacloprid and dinotefuran in nectar and leaves of 2 woody plant species, a broadleaf evergreen tree (Ilex attenuata) and a deciduous shrub (Clethra alnifolia), to assess concentrations to which pollinators and pests might be exposed in landscape settings. Three application timings, autumn (postbloom), spring (prebloom), and summer (early postbloom), were evaluated to see if taking advantage of differences in the neonicotinoids’ systemic mobility and persistence might enable pest control while minimizing transference into nectar.

Scotland’s forests are treated and sprayed every year with hundreds of kilograms of a toxic pesticide blamed for killing bees and butterflies, The Ferret can reveal. Our investigation has uncovered widespread use of the nicotine-based insecticide, acetamiprid, by the forestry industry, provoking concerns from experts and alarm from environmentalists who fear “creeping degradation” of nature.