Evaluation of pesticide toxicity at their field recommended doses to honeybees, Apis cerana and A. mellifera through laboratory, semi-field and field studies

Stanley, J.; Sah, Khushboo; Jain, Sharad; Bhatt, J. C.; Sushil, S. N.

doi:10.1016/j.chemosphere.2014.07.039

Cited by 69 publications

(39 citation statements)

References 27 publications

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“…We provide the first evidence that A. cerana larvae exposed to imidacloprid (0.24 ng/bee) had significantly impaired olfactory learning as adults: control bees exhibited 2.5- and 4.8-fold better short-term learning acquisition. Our results support research suggesting that A. cerana may be more sensitive to pesticides than A. mellifera 1314. Giving 0.12 ng/bee did not impair olfactory learning in A. mellifera 42, but a 0.1 ng/bee dose significantly reduced olfactory learning in A. cerana .…”

Section: Discussionsupporting

confidence: 89%

“…Research on neonicotinoid sublethal effects is crucial because assays that only test for lethality do not reveal more subtle impairments such as degraded bee learning, which can affect colony health and foraging and pollination8910. In addition, most studies examining pesticide effects on bees have focused on a single honey bee species, A. mellifera , even though other honey bee species also play an important role in ecosystem and crop pollination1112, can be more sensitive than A. mellifera to certain pesticides1314 and contribute to pollination services that are vital for human nutrition15.…”

mentioning

confidence: 99%

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A neonicotinoid impairs olfactory learning in Asian honey bees (Apis cerana) exposed as larvae or as adults

Tan

Chen

Dong

et al. 2015

Sci Rep

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Xenobiotics such as the neonicotinoid pesticide, imidacloprid, are used globally, but their effects on native bee species are poorly understood. We studied the effects of sublethal doses of imidacloprid on olfactory learning in the native honey bee species, Apis cerana, an important pollinator of agricultural and native plants throughout Asia. We provide the first evidence that imidacloprid can impair learning in A. cerana workers exposed as adults or as larvae. Adults that ingested a single imidacloprid dose as low as 0.1 ng/bee had significantly reduced olfactory learning acquisition, which was 1.6-fold higher in control bees. Longer-term learning (1-17 h after the last learning trial) was also impaired. Bees exposed as larvae to a total dose of 0.24 ng/bee did not have reduced survival to adulthood. However, these larval-treated bees had significantly impaired olfactory learning when tested as adults: control bees exhibited up to 4.8-fold better short-term learning acquisition, though longer-term learning was not affected. Thus, sublethal cognitive deficits elicited by neonicotinoids on a broad range of native bee species deserve further study.

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Section: Discussionsupporting

confidence: 89%

mentioning

confidence: 99%

A neonicotinoid impairs olfactory learning in Asian honey bees (Apis cerana) exposed as larvae or as adults

Tan

Chen

Dong

et al. 2015

Sci Rep

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“…In honeybees, mortality is delayed from high doses of IMD, compared to moderate doses 48 , prompting use of a 96 h endpoint. Furthermore, suggestions to score insects as dead when moribund result from delayed insecticide toxicity 49 . Nevertheless, locusts are known to express a wide range of enzymes involved with xenobiotic detoxification 50 , and display resistance to many insecticides 51 .…”

Section: Discussionmentioning

confidence: 99%

A sublethal dose of a neonicotinoid insecticide disrupts visual processing and collision avoidance behaviour in Locusta migratoria

Parkinson

Little

Gray

2017

Sci Rep

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Neonicotinoids are known to affect insect navigation and vision, however the mechanisms of these effects are not fully understood. A visual motion sensitive neuron in the locust, the Descending Contralateral Movement Detector (DCMD), integrates visual information and is involved in eliciting escape behaviours. The DCMD receives coded input from the compound eyes and monosynaptically excites motorneurons involved in flight and jumping. We show that imidacloprid (IMD) impairs neural responses to visual stimuli at sublethal concentrations, and these effects are sustained two and twenty-four hours after treatment. Most significantly, IMD disrupted bursting, a coding property important for motion detection. Specifically, IMD reduced the DCMD peak firing rate within bursts at ecologically relevant doses of 10 ng/g (ng IMD per g locust body weight). Effects on DCMD firing translate to deficits in collision avoidance behaviours: exposure to 10 ng/g IMD attenuates escape manoeuvers while 100 ng/g IMD prevents the ability to fly and walk. We show that, at ecologically-relevant doses, IMD causes significant and lasting impairment of an important pathway involved with visual sensory coding and escape behaviours. These results show, for the first time, that a neonicotinoid pesticide directly impairs an important, taxonomically conserved, motion-sensitive visual network.

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“…It is not clear whether this is as a result of individual performance deteriorating or new emerging workers having been exposed for a greater period of time. Stanley et al (2015a) exposed B. terrestris colonies to 2.4 or 10 ppb thiamethoxam-treated sugar solution for 13 days. Colonies were then moved to pollinator exclusion cages where they were allowed to forage freely on two varieties of apple blossom.…”

Section: Colony-level Impact On Bumblebeesmentioning

confidence: 99%

An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 2: impacts on organisms and ecosystems

Pisa

Goulson

Yang

et al. 2017

Environ Sci Pollut Res

202

144

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New information on the lethal and sublethal effects of neonicotinoids and fipronil on organisms is presented in this review, complementing the previous Worldwide Integrated Assessment (WIA) in 2015. The high toxicity of these systemic insecticides to invertebrates has been confirmed and expanded to include more species and compounds. Most of the recent research has focused on bees and the sublethal and ecological impacts these insecticides have on pollinators. Toxic effects on other invertebrate taxa also covered predatory and parasitoid natural enemies and aquatic arthropods. Little new information has been gathered on soil organisms. The impact on marine and coastal ecosystems is still largely uncharted. The chronic lethality of neonicotinoids to insects and crustaceans, and the strengthened evidence that these chemicals also impair the immune system and reproduction, highlights the dangers of this particular insecticidal class (neonicotinoids and fipronil), with the potential to greatly decrease populations of arthropods in both terrestrial and aquatic environments. Sublethal effects on fish, reptiles, frogs, birds, and mammals are also reported, showing a better understanding of the mechanisms of toxicity of these insecticides in vertebrates and their deleterious impacts on growth, reproduction, and neurobehaviour of most of the species tested. This review concludes with a summary of impacts on the ecosystem services and functioning, particularly on pollination, soil biota, and aquatic invertebrate communities, thus reinforcing the previous WIA conclusions .

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Evaluation of pesticide toxicity at their field recommended doses to honeybees, Apis cerana and A. mellifera through laboratory, semi-field and field studies

Cited by 69 publications

References 27 publications

A neonicotinoid impairs olfactory learning in Asian honey bees (Apis cerana) exposed as larvae or as adults

A neonicotinoid impairs olfactory learning in Asian honey bees (Apis cerana) exposed as larvae or as adults

A sublethal dose of a neonicotinoid insecticide disrupts visual processing and collision avoidance behaviour in Locusta migratoria

An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 2: impacts on organisms and ecosystems

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