Cargando…

A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees

As part of the agricultural landscape, non-target organisms, such as bees, may be exposed to a cocktail of agrochemicals including insecticides and spray adjuvants like organosilicone surfactants (OSS). While the risks of insecticides are evaluated extensively in their approval process, in most part...

Descripción completa

Detalles Bibliográficos
Autores principales: Wernecke, Anna, Eckert, Jakob H., Bischoff, Gabriela, Forster, Rolf, Pistorius, Jens, Odemer, Richard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10267468/
https://www.ncbi.nlm.nih.gov/pubmed/37324382
http://dx.doi.org/10.3389/fphys.2023.1171817
_version_ 1785058934975889408
author Wernecke, Anna
Eckert, Jakob H.
Bischoff, Gabriela
Forster, Rolf
Pistorius, Jens
Odemer, Richard
author_facet Wernecke, Anna
Eckert, Jakob H.
Bischoff, Gabriela
Forster, Rolf
Pistorius, Jens
Odemer, Richard
author_sort Wernecke, Anna
collection PubMed
description As part of the agricultural landscape, non-target organisms, such as bees, may be exposed to a cocktail of agrochemicals including insecticides and spray adjuvants like organosilicone surfactants (OSS). While the risks of insecticides are evaluated extensively in their approval process, in most parts of the world however, authorization of adjuvants is performed without prior examination of the effects on bees. Nevertheless, recent laboratory studies evidence that adjuvants can have a toxicity increasing effect when mixed with insecticides. Therefore, this semi-field study aims to test whether an OSS mixed with insecticides can influence the insecticidal activity causing increased effects on bees and bee colonies under more realistic exposure conditions. To answer this question a pyrethroid (Karate Zeon) and a carbamate (Pirimor Granulat) were applied in a highly bee attractive crop (oil seed rape) during bee flight either alone or mixed with the OSS Break-Thru S 301 at field realistic application rates. The following parameters were assessed: mortality, flower visitation, population and brood development of full-sized bee colonies. Our results show that none of the above mentioned parameters was significantly affected by the insecticides alone or their combination with the adjuvant, except for a reduced flower visitation rate in both carbamate treatments (Tukey-HSD, p < 0.05). This indicates that the OSS did not increase mortality to a biologically relevant extent or any of the parameters observed on honey bees and colonies in this trial. Hence, social buffering may have played a crucial role in increasing thresholds for such environmental stressors. We confirm that the results of laboratory studies on individual bees cannot necessarily be extrapolated to the colony level and further trials with additional combinations are required for a well-founded evaluation of these substances.
format Online
Article
Text
id pubmed-10267468
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-102674682023-06-15 A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees Wernecke, Anna Eckert, Jakob H. Bischoff, Gabriela Forster, Rolf Pistorius, Jens Odemer, Richard Front Physiol Physiology As part of the agricultural landscape, non-target organisms, such as bees, may be exposed to a cocktail of agrochemicals including insecticides and spray adjuvants like organosilicone surfactants (OSS). While the risks of insecticides are evaluated extensively in their approval process, in most parts of the world however, authorization of adjuvants is performed without prior examination of the effects on bees. Nevertheless, recent laboratory studies evidence that adjuvants can have a toxicity increasing effect when mixed with insecticides. Therefore, this semi-field study aims to test whether an OSS mixed with insecticides can influence the insecticidal activity causing increased effects on bees and bee colonies under more realistic exposure conditions. To answer this question a pyrethroid (Karate Zeon) and a carbamate (Pirimor Granulat) were applied in a highly bee attractive crop (oil seed rape) during bee flight either alone or mixed with the OSS Break-Thru S 301 at field realistic application rates. The following parameters were assessed: mortality, flower visitation, population and brood development of full-sized bee colonies. Our results show that none of the above mentioned parameters was significantly affected by the insecticides alone or their combination with the adjuvant, except for a reduced flower visitation rate in both carbamate treatments (Tukey-HSD, p < 0.05). This indicates that the OSS did not increase mortality to a biologically relevant extent or any of the parameters observed on honey bees and colonies in this trial. Hence, social buffering may have played a crucial role in increasing thresholds for such environmental stressors. We confirm that the results of laboratory studies on individual bees cannot necessarily be extrapolated to the colony level and further trials with additional combinations are required for a well-founded evaluation of these substances. Frontiers Media S.A. 2023-06-01 /pmc/articles/PMC10267468/ /pubmed/37324382 http://dx.doi.org/10.3389/fphys.2023.1171817 Text en Copyright © 2023 Wernecke, Eckert, Bischoff, Forster, Pistorius and Odemer. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Physiology
Wernecke, Anna
Eckert, Jakob H.
Bischoff, Gabriela
Forster, Rolf
Pistorius, Jens
Odemer, Richard
A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees
title A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees
title_full A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees
title_fullStr A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees
title_full_unstemmed A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees
title_short A selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees
title_sort selected organosilicone spray adjuvant does not enhance lethal effects of a pyrethroid and carbamate insecticide on honey bees
topic Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10267468/
https://www.ncbi.nlm.nih.gov/pubmed/37324382
http://dx.doi.org/10.3389/fphys.2023.1171817
work_keys_str_mv AT werneckeanna aselectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT eckertjakobh aselectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT bischoffgabriela aselectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT forsterrolf aselectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT pistoriusjens aselectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT odemerrichard aselectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT werneckeanna selectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT eckertjakobh selectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT bischoffgabriela selectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT forsterrolf selectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT pistoriusjens selectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees
AT odemerrichard selectedorganosiliconesprayadjuvantdoesnotenhancelethaleffectsofapyrethroidandcarbamateinsecticideonhoneybees