Widespread detections of neonicotinoid contaminants in central Wisconsin groundwater

Bradford, Benjamin Z; Huseth, Anders S.; Groves, Russell L.

doi:10.1371/journal.pone.0201753

Cited by 48 publications

(22 citation statements)

References 40 publications

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“…The high water solubility of these pesticides facilitates their absorption by the seedling upon germination and translocation throughout the plant where they are available for exposure to targeted herbivorous insect pests (Simon-Delso et al, 2015). In addition, the combination of high-water solubility, relatively long half-lives, and the fact that <20% of the neonicotinoids in the seed coating are taken up by target plants increases the likelihood of environmental contamination (Hladik, Kolpin & Kuivila, 2014;Hladik, Main & Goulson, 2018) as indicated by their presence in streams (Hladik & Kolpin, 2016), groundwater (Bradford, Huseth & Groves, 2018), and tap water (Klarich et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Uptake and toxicity of clothianidin to monarch butterflies from milkweed consumption

Bargar

Hladik

Daniels

2020

PeerJ

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Recent concern for the adverse effects from neonicotinoid insecticides has centered on risk for insect pollinators in general and bees specifically. However, natural resource managers are also concerned about the risk of neonicotinoids to conservation efforts for the monarch butterfly (Danaus plexippus) and need additional data to help estimate risk for wild monarch butterflies exposed to those insecticides. In the present study, monarch butterfly larvae were exposed in the laboratory to clothianidin via contaminated milkweed plants from hatch until pupation, and the effects upon larval survival, larval growth, pupation success, and adult size were measured. Soils dosed with a granular insecticide product led to mean clothianidin concentrations of 10.8–2,193 ng/g in milkweed leaves and 5.8–58.0 ng/g in larvae. Treatment of soils also led to clothianidin concentrations of 2.6–5.1 ng/g in adult butterflies indicating potential for transfer of systemic insecticides from the soil through plants and larvae to adult butterflies. Estimated LC50s for total mortality (combined mortality of larvae and pupae) and EC50 for larval growth were variable but higher than the majority of concentrations reported in the literature for clothianidin contamination of leaves.

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Section: Introductionmentioning

confidence: 99%

Uptake and toxicity of clothianidin to monarch butterflies from milkweed consumption

Bargar

Hladik

Daniels

2020

PeerJ

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“…It has been hypothesized that pesticide residues contaminate aquatic habitats and contribute to the selection of resistance genes among non-target insect populations including mosquito larvae. Neonicotinoids are highly soluble in water and can persist for months in aerobic soils, therefore making contamination of mosquito breeding sites following agricultural use highly likely [24]. Published information on the usage of neonicotinoids across Sub-Saharan Africa is lacking, but preliminary reports from Cameroon, Tanzania and Ivory Coast suggest that hundreds of commercial formulations of neonicotinoids have been registered for use in crop protection [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Resistance to clothianidin reduces the efficacy of SumiShield® 50WG, a neonicotinoid formulation for indoor residual spraying, againstAnopheles gambiae

Fouet

Ashu

Ambadiang

et al. 2020

Preprint

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Background: New active ingredients, mostly repurposed from the agricultural sector, are gradually being introduced into malaria vector control programs. Prior to scaling up novel insecticides, it is vital to assess if their use in agriculture has already selected mosquito populations with reduced susceptibility in some areas. The aim of the present study was to determine if the use of neonicotinoids in agricultural pest management could drive resistance to clothianidin - a neonicotinoid recently prequalified by WHO for indoor residual spraying. Methods: We carried out intensive sampling of Anopheles gambiae, An. coluzzii and Culex sp. larvae from a large suburban farm and from 4 surrounding locations belonging to the rural and urban ecosystems of Yaounde, Cameroon. Using WHO tube tests and CDC bottle bioassays, we tested the recommended diagnostic doses of clothianidin against field-collected populations using two laboratory strains as susceptible controls. We exposed adult mosquitoes to the insecticide for 1 h and monitored mortality rates for seven consecutive days. Results: An. coluzzii and Culex sp. mosquitoes were fully susceptible to clothianidin reaching 100% mortality by day 3. By contrast, An. gambiae populations revealed heterogeneous profiles ranging from susceptibility to strong resistance. Populations from the suburban farm, where neonicotinoids are routinely used, displayed the lowest mortality rate (46.5 % ± 5.65) and were capable of surviving 5X and 10X the diagnostic dose of clothianidin. When clothianidin was tested in combination with the synergist piperonyl butoxide, mortality of resistant populations increased from 46.5 % to 92.7 % implying that Cytochrome P450 enzymes play an integral role in the genetic mechanism underlying clothianidin resistance in An. gambiae. Conclusions: These findings show that small clusters of resistance to clothianidin may exist around farmlands where agricultural neonicotinoids are being used. Patches of intensive agriculture should be particularly monitored in indoor residual spraying target areas.

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“…Because imidacloprid and the other neonicotinoids clothianidin and thiamethoxam pose an unacceptably high risk to bees, the European Union decided in April 2018 to ban these neonicotinoids for all outdoor uses. Nevertheless, imidacloprid is still widely applied in North America and Australia, and because it is extremely effective against many hemipteran insect pests, it has been extensively used in rice-planting regions of Asia to control rice planthoppers (Sánchez-Bayo and Hyne 2014;Bradford et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Oligotrophic bacterium Hymenobacter latericoloratus CGMCC 16346 degrades the neonicotinoid imidacloprid in surface water

et al. 2020

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The intensive and extensive application of imidacloprid in agriculture has resulted in water pollution and risks to aquatic invertebrates. However, pure bacteria remediation of imidacloprid in surface water environments has not been studied. Here, we isolated an imidacloprid-degrading bacterium from a water environment, examined its imidacloprid degradation in pure culture and surface water, sequenced its genome, and compared its Clusters of Orthologous Groups (COG) protein categorization with that for another imidacloprid-degrading bacterium. The isolate was an obligate oligotrophic bacterium, Hymenobacter latericoloratus CGMCC 16346, which degraded imidacloprid via hydroxylation by co-metabolism in pure culture. Resting cells degraded 64.4% of 100 mg/L imidacloprid in 6 days in the presence of co-substrate maltose, and growing culture degraded 40.8% of imidacloprid in 10 days. H. latericoloratus CGMCC 16346 degraded imidacloprid in surface water without co-substrate supplementation and retained imidacloprid-degrading activity after 30 days. The half-life of imidacloprid in surface water was decreased from 173.3 days in the control to 57.8 days by CGMCC 16346 inoculation. Genome sequencing and COG analysis indicated that carbohydrate metabolism and transport, cell wall/membrane biogenesis, and defense mechanisms are enriched in H. latericoloratus CGMCC 16346 compared with the copiotrophic imidacloprid-degrading Pseudoxanthomonas indica CGMCC 6648, indicating that H. latericoloratus CGMCC 16346 is adapted to live in oligotrophic water environments and biofilms. H. latericoloratus CGMCC 16346 is a promising bioremediation agent for elimination of imidacloprid contamination from surface water.

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Widespread detections of neonicotinoid contaminants in central Wisconsin groundwater

Cited by 48 publications

References 40 publications

Uptake and toxicity of clothianidin to monarch butterflies from milkweed consumption

Uptake and toxicity of clothianidin to monarch butterflies from milkweed consumption

Resistance to clothianidin reduces the efficacy of SumiShield® 50WG, a neonicotinoid formulation for indoor residual spraying, againstAnopheles gambiae

Oligotrophic bacterium Hymenobacter latericoloratus CGMCC 16346 degrades the neonicotinoid imidacloprid in surface water

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