Moderate use of pesticides in allotment gardens as indicated by their residues in larval food provisions of Osmia solitary bees

Journal of Apicultural Research, Год журнала: 2023, Номер unknown, С. 1 - 13

Опубликована: Дек. 11, 2023

Exposure to pesticides may jeopardize pollinators, but it has rarely been examined in urban landscapes. We used larval food provisions (mix of pollen and nectar) mason bees (Osmia spp.) nested artificial shelters as matrices investigate the rate pesticide pollution twelve allotment sites Prague Brno cities. Seven commercial croplands (fruit orchards, oilseed rape fields) were selected for comparison. In total, 79 samples analysed using a validated UPLC–MS/MS method presence 262 and/or important metabolites. Fifty-six residues detected allotments 74 cropland sites. Fifty compounds common both Fewer found (14.3 ± 0.9, mean SE) than (21.5 1.1, SE; df = 17.4; t −2.9; p < 0.01), they present at low levels up 16 ppb. sites, ten occurred high individual concentrations (mean per site > 10 ppb). The highest observed fungicide pyrimethanil 1,989 ppb, maximum 3,983 ppb) among insecticides thiacloprid 136 170 results supported presumption lower risk exposure gardens croplands. Given limited knowledge on sublethal effects especially mixtures solitary bee development, regulation or control use is recommended.

Язык: Английский

Pollinator communities in a blackberry cropping system under intense pest management

Acta Horticulturae, Год журнала: 2024, Номер 1388, С. 197 - 208

Опубликована: Фев. 1, 2024

Язык: Английский