Exposure to sublethal concentration of flupyradifurone alters sexual behavior and cuticular hydrocarbon profile in <i>Heriades truncorum</i>, an oligolectic solitary bee

Boff, Samuel; Ayasse, Manfred

doi:10.1111/1744-7917.13268

Cited by 3 publications

(4 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consistent with these considerations, treating males, females, or both partners with insecticides reduced the mating frequency in our experiments to levels as low as 35% for flupyradifurone. A recent study demonstrated that sublethal doses of flupyradifurone modified the cuticular hydrocarbon profile in an oligolectic bee (Boff & Ayasse, 2023). In our study, treatment of females with flupyradifurone reduced the mating frequency at any of the tested doses.…”

Section: Discussionsupporting

confidence: 53%

Effects of sub‐nanogram doses of acetamiprid, dimethoate, flupyradifurone, and sulfoxaflor on courtship, mating, and olfactory host finding of the parasitic wasp Lariophagus distinguendus

Schöfer,

Ratschmann,

Ruther

2024

Entomologia Exp Applicata

View full text Add to dashboard Cite

Continued use and development of new insecticides are seen as a necessary part of modern agriculture, but insecticides, even at sublethal levels, may also affect beneficial non‐target species, such as pollinators, predators, and parasitic wasps. Here, we studied sublethal effects of four insecticides – acetamiprid, dimethoate, flupyradifurone, and sulfoxaflor – all targeting cholinergic neurons in insects, on sexual communication and olfactory host finding in the parasitic wasp Lariophagus distinguendus (Förster) (Hymenoptera: Pteromalidae). We found that all four insecticides reduced, at least at one of the tested sublethal doses, pheromone‐mediated courtship behaviour (wing fanning) in males and the mating frequency of treated wasps. Treated females no longer preferred host‐associated kairomones. This suggests that the olfactory sense of the wasps is hampered by sublethal insecticide doses. The lowest bioactive doses tested in the bioassays were 0.021 ng for sulfoxaflor and 0.105 ng for acetamiprid, dimethoate, and flupyradifurone. These low amounts are field realistic and might be taken up by the wasps, e.g., by feeding contaminated plant nectar. Exposure to these compounds likely compromises the important ecosystem service provided by parasitic wasps as natural enemies in terrestrial ecosystems.

show abstract

Section: Discussionsupporting

confidence: 53%

Effects of sub‐nanogram doses of acetamiprid, dimethoate, flupyradifurone, and sulfoxaflor on courtship, mating, and olfactory host finding of the parasitic wasp Lariophagus distinguendus

Schöfer,

Ratschmann,

Ruther

2024

Entomologia Exp Applicata

View full text Add to dashboard Cite

show abstract

“…Pesticides can also alter bee olfactory processing (Mustard et al, 2020;, as well as cuticular hydrocarbons (Boff & Ayasse, 2023), meaning that communication around the formation of dominance hierarchies may be disrupted by pesticide exposure. Indeed, previous work has found that bumblebee (B. impatiens) colony-level social networks become smaller with workers interacting less with each other when they are exposed to the neonicotinoid imidacloprid (Crall et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…FPF can also impair reproductive output in solitary bee species (Osmia bicornis and Xenoglossa pruinosa) (Knauer et al, 2022;Rondeau & Raine, 2024) and can impact mating behaviour in another solitary bee (Heriades truncorum) (Boff & Ayasse, 2023).…”

Section: Introductionmentioning

confidence: 99%

Field‐realistic exposure to the novel insecticide flupyradifurone reduces reproductive output in a bumblebee (Bombus impatiens)

Richardson,

Siviter,

Jha

et al. 2024

Journal of Applied Ecology

View full text Add to dashboard Cite

Novel insecticides are continuously being developed for application in response to increased legal restriction of previously developed insecticides and resistance in target insects. These novel insecticides, such as flupyradifurone (FPF), remain relatively untested on non‐target organisms, including bumblebees. Further, existing tests on honeybees tend to focus on adult mortality and thus sub‐lethal effects, such as impacts on reproductive output, are neglected, despite their importance for population‐level impacts. To address if the novel insecticide FPF has sub‐lethal effects on bumblebee reproduction and behaviour, we established microcolonies and chronically exposed them to field‐realistic concentrations over a 14‐day period. We found that exposure to FPF reduced the bumblebees' reproductive output in terms of the number of larvae produced and the mean mass of each larval instar. FPF‐treated bees also stored less sucrose and constructed fewer honeypots. However, adult bumblebee mortality was similar between control and FPF‐exposed microcolonies. Our results show that field‐realistic FPF exposure leads to increased larval mortality and/or delayed larval development, as well as reduced nectar storage, without affecting adult mortality. Policy implications. Insecticides that impair bumblebee reproduction can have long‐term population‐level consequences, even if adult bees do not experience increased mortality. Despite this fact, sub‐lethal effects, such as impacts on reproduction, are not mandatorily assessed within the regulatory process. Our findings highlight the importance of determining sub‐lethal effects of pesticides across developmental stages, as well as using pollinator species other than honeybees within the regulatory process.

show abstract

“…Less is known about the impact of flupyradifurone on non- Apis bees, but acute exposure to the pesticide can impair bumblebee ( B. impatiens ) learning and memory [ 38 ], and chronic exposure can harm bumblebee ( Bombus terrestris ) colony growth [ 56 ]. Exposure to Sivanto, a chemical formulation containing flupyradifurone, can also have both lethal and sub-lethal impacts on solitary bees [ 14 , 57 , 58 ].…”

Section: Introductionmentioning

confidence: 99%

A novel insecticide impairs bumblebee memory and sucrose responsiveness across high and low nutrition

Gray,

Hulsey,

Siviter

2024

R. Soc. Open Sci.

View full text Add to dashboard Cite

Wild bees are important pollinators of crops and wildflowers but are exposed to a myriad of different anthropogenic stressors, such as pesticides and poor nutrition, as a consequence of intensive agriculture. These stressors do not act in isolation, but interact, and may exacerbate one another. Here, we assessed whether a field-realistic concentration of flupyradifurone, a novel pesticide that has been labelled as ‘bee safe’ by regulators, influenced bumblebee sucrose responsiveness and long-term memory. In a fully crossed experimental design, we exposed individual bumblebees ( Bombus impatiens ) to flupyradifurone at high (50% (w/w)) or low (15% (w/w)) sucrose concentrations, replicating diets that are either carbohydrate rich or poor, respectively. We found that flupyradifurone impaired sucrose responsiveness and long-term memory at both sucrose concentrations, indicating that better nutrition did not buffer the negative impact of flupyradifurone. We found no individual impact of sugar deficiency on bee behaviour and no significant interactions between pesticide exposure and poor nutrition. Our results add to a growing body of evidence demonstrating that flupyradifurone has significant negative impacts on pollinators, indicating that this pesticide is not ‘bee safe’. This suggests that agrochemical risk assessments are not protecting pollinators from the unintended consequences of pesticide use.

show abstract

Exposure to sublethal concentration of flupyradifurone alters sexual behavior and cuticular hydrocarbon profile in Heriades truncorum, an oligolectic solitary bee

Cited by 3 publications

References 66 publications

Effects of sub‐nanogram doses of acetamiprid, dimethoate, flupyradifurone, and sulfoxaflor on courtship, mating, and olfactory host finding of the parasitic wasp Lariophagus distinguendus

Effects of sub‐nanogram doses of acetamiprid, dimethoate, flupyradifurone, and sulfoxaflor on courtship, mating, and olfactory host finding of the parasitic wasp Lariophagus distinguendus

Field‐realistic exposure to the novel insecticide flupyradifurone reduces reproductive output in a bumblebee (Bombus impatiens)

A novel insecticide impairs bumblebee memory and sucrose responsiveness across high and low nutrition

Contact Info

Product

Resources

About