ORIGINAL RESEARCH
Acute oral and contact toxicity of three plant protection products to adult solitary bees Osmia bicornis
 
More details
Hide details
1
Faculty of Biology, Jagiellonian University, Institute of Environmental Sciences, Poland
2
Polish Academy of Sciences, Institute of Nature Conservation, Poland
CORRESPONDING AUTHOR
Jaya Sravanthi Mokkapati   

Faculty of Biology, Jagiellonian University, Institute of Environmental Sciences, Gronostajowa 7, 30-387, Krakow, Poland
Submission date: 2020-04-28
Final revision date: 2020-11-07
Acceptance date: 2020-11-16
Online publication date: 2021-03-29
 
 
KEYWORDS
TOPICS
ABSTRACT
Bee pollinators decline worldwide over the last decades mainly due to widespread use of pesticides. However, the data on wild bee sensitivity to pesticides are scarce. As it may not be possible to stop using pesticides at the moment due to growing food demand, we need to make every effort to ensure that they are used in a way that do not jeopardize pollinator populations. We tested the toxicity of three agrochemicals, namely Dursban 480EC with chlorpyrifos as active ingredient (a.i.), Sherpa 100EC (a.i.-cypermethrin), and Mospilan 20SP (a.i.-acetamiprid), to female Osmia bicornis through oral and contact exposures. The estimated LC50s at infinite-time were lower than concentrations recommended for field application for Dursban in both exposure routes, whereas in case of Sherpa and Mospilan the values were lower for oral exposure only. Regardless of the exposure route, high mortality in less than 24 hours was observed in Dursban-treated bees at a fraction of concentration actually used by farmers in the field, indicating high toxicity of this product to O. bicornis. Therefore, some commonly used insecticides may cause unacceptable effects to pollinators even when applied in the field according to recommendations, indicating the urgent need for revising current pesticide usage regulations.
eISSN:2083-5906
ISSN:1230-1485