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Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera)

Commercial beekeepers transporting honey bees across the United States to provide almond pollination services have reported honey bee deaths, possibly due to pesticide applications made during crop bloom. Pesticides are often applied as “tank mixes”, or mixtures of fungicides and insecticides combin...

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Autores principales: Shannon, Brandon, Walker, Emily, Johnson, Reed M
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10564267/
https://www.ncbi.nlm.nih.gov/pubmed/37656894
http://dx.doi.org/10.1093/jee/toad161
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author Shannon, Brandon
Walker, Emily
Johnson, Reed M
author_facet Shannon, Brandon
Walker, Emily
Johnson, Reed M
author_sort Shannon, Brandon
collection PubMed
description Commercial beekeepers transporting honey bees across the United States to provide almond pollination services have reported honey bee deaths, possibly due to pesticide applications made during crop bloom. Pesticides are often applied as “tank mixes”, or mixtures of fungicides and insecticides combined into a single application. Spray adjuvants are often added to tank mixes to improve the application characteristics of a pesticide and include spreaders, stickers, or surfactants. The goal of this research was to determine toxicity of adjuvants to adult worker honey bees, both when applied alone and in adjuvant-pesticide tank mixtures. Field-relevant combinations of formulated products were applied to 3-day-old adult worker honey bees using a Potter Spray Tower, and mortality was assessed 48 h following exposure. Adjuvants tested included Activator-90, Attach, Choice Weather Master, Cohere, Dyne-Amic, Induce, Kinetic, LI 700, Liberate, Nu-Film P, PHT Latron B-1956, and Surf-90; fungicides tested include Luna Sensation (Fluopyram and Trifloxystrobin), Pristine (Pyraclostrobin and Boscalid), Tilt (Propiconazole), and Vangard (Cyprodinil), and insecticides tested include Altacor (Chlorantraniliprole), Intrepid 2F (Methoxyfenozide), and a positive control Mustang Maxx (Zeta-cypermethrin). Results demonstrated that exposure to some adjuvants causes acute honey bee mortality at near-field application rates, both when applied alone and in combination with pesticides. Some adjuvant-pesticide combinations demonstrated increased toxicity compared with the adjuvant alone, while others demonstrated decreased toxicity. A better understanding of adjuvant and adjuvant-pesticide tank mixture toxicity to honey bees will play a key role in informing “Best Management Practices” for pesticide applicators using spray adjuvants during bloom when honey bee exposure is likely.
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spelling pubmed-105642672023-10-11 Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera) Shannon, Brandon Walker, Emily Johnson, Reed M J Econ Entomol Apiculture and Social Insects Commercial beekeepers transporting honey bees across the United States to provide almond pollination services have reported honey bee deaths, possibly due to pesticide applications made during crop bloom. Pesticides are often applied as “tank mixes”, or mixtures of fungicides and insecticides combined into a single application. Spray adjuvants are often added to tank mixes to improve the application characteristics of a pesticide and include spreaders, stickers, or surfactants. The goal of this research was to determine toxicity of adjuvants to adult worker honey bees, both when applied alone and in adjuvant-pesticide tank mixtures. Field-relevant combinations of formulated products were applied to 3-day-old adult worker honey bees using a Potter Spray Tower, and mortality was assessed 48 h following exposure. Adjuvants tested included Activator-90, Attach, Choice Weather Master, Cohere, Dyne-Amic, Induce, Kinetic, LI 700, Liberate, Nu-Film P, PHT Latron B-1956, and Surf-90; fungicides tested include Luna Sensation (Fluopyram and Trifloxystrobin), Pristine (Pyraclostrobin and Boscalid), Tilt (Propiconazole), and Vangard (Cyprodinil), and insecticides tested include Altacor (Chlorantraniliprole), Intrepid 2F (Methoxyfenozide), and a positive control Mustang Maxx (Zeta-cypermethrin). Results demonstrated that exposure to some adjuvants causes acute honey bee mortality at near-field application rates, both when applied alone and in combination with pesticides. Some adjuvant-pesticide combinations demonstrated increased toxicity compared with the adjuvant alone, while others demonstrated decreased toxicity. A better understanding of adjuvant and adjuvant-pesticide tank mixture toxicity to honey bees will play a key role in informing “Best Management Practices” for pesticide applicators using spray adjuvants during bloom when honey bee exposure is likely. Oxford University Press 2023-09-01 /pmc/articles/PMC10564267/ /pubmed/37656894 http://dx.doi.org/10.1093/jee/toad161 Text en © The Author(s) 2023. Published by Oxford University Press on behalf of Entomological Society of America. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Apiculture and Social Insects
Shannon, Brandon
Walker, Emily
Johnson, Reed M
Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera)
title Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera)
title_full Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera)
title_fullStr Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera)
title_full_unstemmed Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera)
title_short Toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (Apis mellifera)
title_sort toxicity of spray adjuvants and tank mix combinations used in almond orchards to adult honey bees (apis mellifera)
topic Apiculture and Social Insects
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10564267/
https://www.ncbi.nlm.nih.gov/pubmed/37656894
http://dx.doi.org/10.1093/jee/toad161
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