Short-term persistence of foliar insecticides and fungicides in pumpkin plants and their pollinators

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(4), P. e0311634 - e0311634

Published: April 2, 2025

To minimize the risk to bees and other beneficial insects, plant protection chemicals are typically applied pollinator-dependent crop plants when flowers absent or unopened. However, this approach does not entirely remove of pollinator exposure. Much research has focused on negative effects systemic insecticides (e.g., seed treatments) pollinators, but less is known about level hazard posed by translocation non-systemic foliar-applied pesticides pollen nectar that consume. In study we assess frequency persistence six in pumpkin ( Cucurbita pepo ) tissues their bee visitors. We analyzed residues three (carbaryl, lambda-cyhalothrin, permethrin) fungicides (chlorothalonil, quinoxyfen, triflumizole) leaves, pollen, collected from five farms north-central USA, one day before a spray event, one, three, seven days after. Bees foraging were after screened for same pesticides. Overall, present 56% leaf samples. Compared fewer (insecticide detected 16%, fungicide 16%) samples (14%, 0%) contained insecticide (carbaryl) two out 69 bees, only male squash (not bumble honey bees), which have life history traits bring them into prolonged close contact with sprayed plants. The some agrochemicals up week following application merits consideration managing crops. Even traditionally considered contact-based unopened can reach produce measurable bees.

Language: Английский

Fungicide consumption exacerbates the negative effects of a common gut parasite in bumble bee microcolonies

Royal Society Open Science, Journal Year: 2025, Volume and Issue: 12(4)

Published: April 1, 2025

Bumble bees face numerous environmental stressors, including gut-parasite infection and exposure to agricultural fungicides, which can negatively impact colony health. This study evaluates the interactive effects of these stressors on bumble bee ( Bombus impatiens ) microcolonies, focusing development, worker survival parasite dynamics. Our aim in evaluating interactions was determine if would experience synergistic negative health outcomes compared single- stressor exposures. We reared 40 queenless treated them with either fungicide-contaminated pollen, inoculation a gut parasite, both, or neither. Contrary original expectations, we did not observe significant between two stressors; however, found that consumption fungicide associated higher likelihood infection, delayed recovery from infection. Fungicide also connected smaller workers, male offspring. correlated decreased pollen overall, fewer developed pupae. provides insights into impacts co-occurring affecting emphasizes importance sublethal pollinator

Language: Английский

Effects of difenoconazole and pyraclostrobin on the development, reproduction, and detoxifying metabolism of Spodoptera frugiperda (J.E. Smith)

Crop Protection, Journal Year: 2024, Volume and Issue: unknown, P. 107081 - 107081

Published: Dec. 1, 2024

Language: Английский