{"id":41701,"date":"2026-05-29T00:01:02","date_gmt":"2026-05-29T04:01:02","guid":{"rendered":"https:\/\/beyondpesticides.org\/dailynewsblog\/?p=41701"},"modified":"2026-05-28T11:15:42","modified_gmt":"2026-05-28T15:15:42","slug":"widespread-multiple-pesticide-exposure-with-adverse-effects-again-documented-in-honey-bee-hives","status":"publish","type":"post","link":"https:\/\/beyondpesticides.org\/dailynewsblog\/2026\/05\/widespread-multiple-pesticide-exposure-with-adverse-effects-again-documented-in-honey-bee-hives\/","title":{"rendered":"Widespread Multiple Pesticide Exposure with Adverse Effects Again Documented in Honey Bee Hives"},"content":{"rendered":"

(Beyond Pesticides<\/em>, May 29, 2026) In a new study published in Environmental Pollution<\/em><\/a>, researchers detected 15 currently used pesticides (CUPs)\u2014including 10 pesticide compounds detected but not applied within the study\u2019s managed fields\u2014 in the pollen of beehives in an environment meant to reflect a typical honey bee foraging range.<\/p>\n

The detection of pesticides that were not directly applied within the study\u2019s target radius demonstrates the pervasiveness of pesticide drift<\/a> into soils, streams, and bodies. In this context, public health and environmental advocates continue to call for a wholesale transition to organic land management.<\/p>\n

The findings are particularly concerning given the toxicity hazards to honey bees associated with pesticide exposure in this study and bolstered by other studies, resulting in documented threats to their health\u2014as reviewed in this Daily News <\/em>below.<\/p>\n

Methodology and Background<\/h2>\n

Researchers at the University of Bern and Agroscope, the Swiss government\u2019s agricultural research arm, conducted this research with agricultural land-use data for 2023 and 2024 from the Zurich (provincial\/Canton) government. The study area was defined as a 2-kilometer radius around the hive placement site, with 4 active hives over the course of a two-year period (April 10, 2023, through May 3, 2024). The land use within the target site was roughly 42 percent agricultural, 16 percent forestland, 21 percent urban built environment, and 16 percent urban green space. There are detailed pesticide application records available for just 9 percent of the agricultural use area. Five honey bee (<\/em>Apis mellifera carnica<\/em>) hives were installed and positioned in Agrocope-managed fields.<\/p>\n

To gather samples, pollen traps were set on each hive and activated one per week for a 24-hour period to minimize any colony stressors. Each sample consisted of 2 grams of pollen per colony, which were combined into a single 10-gram pooled sample per week. The goal with this approach is to create a composite sample of exposure across foraging areas and provide sufficient data on site-level pesticide contamination. For more details on the methodology and statistical analysis, please see pages 8-11 of the study PDF<\/a>.<\/p>\n

Out of the 50 target currently-used pesticides (CUPs) screened by the researchers, 15 (or 30 percent) were detected across both sampling seasons, including the neonicotinoid insecticide Acetamiprid, herbicides Prosulfocarb, Terbuthylazine<\/a>, and fungicides Difenoconazole<\/a> and Mandipropamid<\/a>.<\/p>\n

The core findings can be broken down into several groups:<\/p>\n