Ecotoxicity of Neonicotinoid Insecticides to Bees

Decourtye, Axel; Devillers, James

doi:10.1007/978-1-4419-6445-8_8

Cited by 184 publications

(131 citation statements)

References 54 publications

(60 reference statements)

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“…Therefore, we emphasise the importance of using morphometric parameters as indicators of adverse effects in studies that evaluate the exposure of bees to insecticides during the larval stage. Decourtye and Devillers (2010) stated that several studies have assessed the effects of neonicotinoids on adult bees but warned that the adverse effects on the offspring may have more serious consequences for the colony health than the loss of older bees such as foragers. The delayed development coupled with worker malformation, found in our study, could potentially weaken the colony in the long term and promote susceptibility to diseases and consequent decreases in fitness.…”

Section: Discussionmentioning

confidence: 99%

Consumption of the neonicotinoid thiamethoxam during the larval stage affects the survival and development of the stingless bee, Scaptotrigona aff. depilis

et al. 2016

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-In Brazil, where the use of neonicotinoids is allowed in bee-attracting flowering crops, we investigated whether thiamethoxam intake during the larval stage of the native bee species Scaptotrigona aff. depilis affects the survival and development by exposing larvae to contaminated food. Our results indicated that the larvae exposed to the dose at a field-realistic level and to the doses ranging around it had their survival rates significantly impaired. At the highest doses, we observed larvae and pupae with shorter and longer development times, respectively, and the formation of smaller and asymmetric specimens. Evidently, we need to consider that thiamethoxam reaches the pollen and nectar at residual levels, and that they are processed by nurse bees before destined for offspring. Nevertheless, our findings suggest a warning, since the individuals had their biological parameters affected by thiamethoxam, when exposed to doses at field-realistic levels.larval food / in vitro rearing / adverse effects / developmental stage / insecticides

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Section: Discussionmentioning

confidence: 99%

Consumption of the neonicotinoid thiamethoxam during the larval stage affects the survival and development of the stingless bee, Scaptotrigona aff. depilis

et al. 2016

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“…The systemic neonicotinoids, which have been detected as residues in nectar and pollen, have been blamed for colony losses and shown to affect bees negatively at both individual and colony levels (Blacquière et al, 2012;Decourtye and Devilliers, 2009). Until the development of this class of synthetic insecticides, the chemically related alkaloid nicotine was widely used as an insecticide, and still plays a role in organic farming (Casanova et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Resistance of developing honeybee larvae during chronic exposure to dietary nicotine

Human

Archer

Rand

et al. 2014

Journal of Insect Physiology

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The effects of pesticides on honeybee larvae are less understood than for adult bees, even though larvae are chronically exposed to pesticide residues that accumulate in comb and food stores in the hive. We investigated how exposure to a plant alkaloid, nicotine, affects survival, growth and body composition of honeybee larvae. Larvae of Apis mellifera scutellata were reared in vitro and fed throughout development on standard diets with nicotine included at concentrations from 0 to 1000 µg/100 g diet. Overall mortality across all nicotine treatments was low, averaging 9.8 % at the prepupal stage and 18.1 % at the whiteeyed pupal stage, but survival was significantly reduced by nicotine. The mass of prepupae and white-eyed pupae was not affected by nicotine. In terms of body composition, nicotine affected water content but did not influence either protein or lipid stores of white-eyed pupae.We attribute the absence of consistent negative effects of dietary nicotine to detoxification mechanisms in developing honeybees, which enable them to resist both natural and synthetic xenobiotics.

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“…However, neonicotinoids such as imidacloprid, clothianidin, and thiamethoxam are extremely toxic to bees with lethal and sublethal effects depending on the level of exposure. The lethal dose (LD 50 ) (the dose at which half of the exposed bees die) for clothianidin is 2.8 -3.7 ng per bee for oral ingestion; for thiamethoxam, it is 4 -5 ng/bee; and for imidacloprid, it is 3.7 ng/bee (Iwasa et al, 2004;Decourtye and Devillers, 2010;Laurino et al, 2011). Moreover, systemic neonicotinoids may persist for a long time in plant tissues, plant parts, or soil.…”

Section: Introductionmentioning

confidence: 99%

Effects of exposure of honey bee colonies to neonicotinoid seed–treated maize crops

Pohorecka¹,

Skubida²,

Semkiw³

et al. 2013

Journal of Apicultural Science

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A b s t r a c t The effects to honeybee colonies (Apis mellifera L.) during and after exposure to flowering maize (Zea mays L.), grown from seeds coated with clothianidin and imidacloprid was assessed in field-realistic conditions. The experimental maize crops were adjacent to the other flowering agriculture plants. Honey bee colonies were placed in three differently protected maize fields throughout the blooming period, and thereafter they were transferred to a stationary apiary. Samples of pollen loads, bee bread, and adult bees were collected and analyzed for neonicotinoid residues. To ensure high specificity and sensitivity of detection of the analyzed pesticides, a modified QuEChERS extraction method and liquid chromatography coupled with tandem mass spectrometry were used. Clothianidin was detected only in the samples of pollen loads. Their residue levels ranged from 10.0 to 41.0 ng/g (average 27.0 ng/g). Imidacloprid was found in no investigated sample. No negative effects of neonicotinoid seed-treated maize on the development and long-term survival of honey bee colonies were observed. The low proportion of Zea mays pollen in total bee-collected pollen during the maize flowering period was noted. The findings suggest that maize plants are less attractive forage for honey bees than phacelia (Phacelia tanacetifolia Benth.), buckwheat (Fagopyrum Mill.), white clover (Trifolium repens L.), goldenrod (Solidago L.), and vegetation from Brassicaceae family. The results indicate a possibility of reducing the risk of bees being exposed to the toxic effect of insecticidal dusts dispersed during maize sowing by seeding, in the areas surrounding maize crops, plants that bloom later in the year.

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Ecotoxicity of Neonicotinoid Insecticides to Bees

Cited by 184 publications

References 54 publications

Consumption of the neonicotinoid thiamethoxam during the larval stage affects the survival and development of the stingless bee, Scaptotrigona aff. depilis

Consumption of the neonicotinoid thiamethoxam during the larval stage affects the survival and development of the stingless bee, Scaptotrigona aff. depilis

Resistance of developing honeybee larvae during chronic exposure to dietary nicotine

Effects of exposure of honey bee colonies to neonicotinoid seed–treated maize crops

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