Spatial and Temporal Distribution of Residues of Imidacloprid and Its Insecticidal 5-Hydroxy and Olefin and Metabolites in Eastern Hemlock (Pinales: Pinaceae) in the Southern Appalachians

Coots, Carla; Lambdin, Paris; Grant, Jerome F.; Rhea, Rusty

doi:10.1603/ec13142

Cited by 25 publications

(18 citation statements)

References 9 publications

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“…Using the formula outlined by Schöning and Schmuck [27], imidacloprid, olefin-imidacloprid, and dinotefuran residuals in parts per billion (ppb) were determined using the average peak areas of imidacloprid and dinotefuran conversions for each analyte [25]. Imidacloprid, olefin-imidacloprid, and dinotefuran concentration data were converted from ng g −1 of each analyte (dry weight) to ppb and placed into an Excel ® file and analyzed using Proc Mixed ANOVA in SAS [29].…”

Section: Discussionmentioning

confidence: 99%

“…For example, average imidacloprid concentrations ranged from 8.0 to 134.0 ppb and olefin-imidacloprid concentrations ranged from 2.0 to 4.5 ppb. However, olefin-imidacloprid concentrations have been documented to progressively increase as imidacloprid concentrations decreased over time [25]. The olefin-imidacloprid metabolite, one of 12 known metabolites of imidacloprid, has been reported to be at least ten times more active than its parent compound against the green peach aphid, Aphis gossypii Glover [34], and 13 times more active against hemlock woolly adelgid [25].…”

Section: Concentration Levels Of Olefin-imidacloprid In Walnut Husk Amentioning

confidence: 99%

“…However, olefin-imidacloprid concentrations have been documented to progressively increase as imidacloprid concentrations decreased over time [25]. The olefin-imidacloprid metabolite, one of 12 known metabolites of imidacloprid, has been reported to be at least ten times more active than its parent compound against the green peach aphid, Aphis gossypii Glover [34], and 13 times more active against hemlock woolly adelgid [25]. Another metabolite, i.e., 5-hydroxy-imidacloprid, has been documented to be slightly less active than the parent imidacloprid; however, 5-hydroxy-imidacloprid still retains relatively high toxicological properties [25].…”

Section: Concentration Levels Of Olefin-imidacloprid In Walnut Husk Amentioning

confidence: 99%

“…The olefin-imidacloprid metabolite, one of 12 known metabolites of imidacloprid, has been reported to be at least ten times more active than its parent compound against the green peach aphid, Aphis gossypii Glover [34], and 13 times more active against hemlock woolly adelgid [25]. Another metabolite, i.e., 5-hydroxy-imidacloprid, has been documented to be slightly less active than the parent imidacloprid; however, 5-hydroxy-imidacloprid still retains relatively high toxicological properties [25]. This paper is the first report of olefin-imidacloprid in tissue of any deciduous tree and infers longer-term residual effects that could result in longer control of pest insects due to the toxicity of imidacloprid's metabolites.…”

Section: Concentration Levels Of Olefin-imidacloprid In Walnut Husk Amentioning

confidence: 99%

“…However, little is known regarding the movement of these two systemically applied pesticides, imidacloprid and dinotefuran, within the black walnut tissue. Additionally, little is known about the imidacloprid metabolite, olefin-imidacloprid, which is reported to be more toxic than imidacloprid [25], and it is unknown at what levels and for how long olefin-imidacloprid can remain within deciduous plant material, including nutmeat. Although research has been conducted on the spatial and temporal movement of imidacloprid in eastern hemlocks, Tsuga canadensis L., [26], it is important to understand the movement of imidacloprid and its derivative chemicals, i.e., olefin-imidacloprid, through black walnuts if they are going to be considered for control of wood-boring insects associated with TCD.…”

Section: Introductionmentioning

confidence: 99%

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Concentration Levels of Imidacloprid and Dinotefuran in Five Tissue Types of Black Walnut, Juglans nigra

Nix

Lambdin

Grant

et al. 2013

Forests

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Black walnut, a valuable economic and environmentally important species, is threatened by thousand cankers disease. Systemic imidacloprid and dinotefuran applications were made to mature black walnut trees to evaluate their translocation and concentration levels in various tissue types including leaf, twig, trunk core, nutmeat, and walnut husk. The metabolism of imidacloprid in plants produces a metabolite, olefin-imidacloprid, which has been documented to have insecticidal properties in other systems. Trunk CoreTect (imidacloprid) soil pellets and a trunk spray of dinotefuran were applied to mature black walnuts in spring 2011. Imidacloprid concentrations were detected in both the lower and upper strata in all tissue types tested and progressively increased through month 12 post-treatment in twig and leaf tissue. Olefin-imidacloprid was detected in the nutmeat and walnut husk. Dinotefuran was only detected in the first sampling period and was found in low concentration levels in leaf and twig tissue types, and was not detected in the trunk, nutmeat or the walnut husk.

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Section: Discussionmentioning

confidence: 99%

Section: Concentration Levels Of Olefin-imidacloprid In Walnut Husk Amentioning

confidence: 99%

Section: Concentration Levels Of Olefin-imidacloprid In Walnut Husk Amentioning

confidence: 99%

Section: Concentration Levels Of Olefin-imidacloprid In Walnut Husk Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Concentration Levels of Imidacloprid and Dinotefuran in Five Tissue Types of Black Walnut, Juglans nigra

Nix

Lambdin

Grant

et al. 2013

Forests

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Risk assessment of imidacloprid use in forest settings on the aquatic macroinvertebrate community

Benton

Grant

Nichols

et al. 2017

Enviro Toxic and Chemistry

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The isolated effects of a single insecticide can be difficult to assess in natural settings because of the presence of numerous pollutants in many watersheds. Imidacloprid use for suppressing hemlock woolly adelgid, Adelges tsugae (Annand) (Hemiptera: Adelgidae), in forests offers a rare opportunity to assess potential impacts on aquatic macroinvertebrates in relatively pristine landscapes. Aquatic macroinvertebrate communities were assessed in 9 streams in Great Smoky Mountains National Park (southern Appalachian Mountains, USA). The streams flow through hemlock conservation areas where imidacloprid soil drench treatments were applied for hemlock woolly adelgid suppression. Sites were located upstream and downstream of the imidacloprid treatments. Baseline species presence data (pre-imidacloprid treatment) were available from previous sample collections at downstream sites. Downstream and upstream sites did not vary in numerous community measures. Although comparisons of paired upstream and downstream sites showed differences in diversity in 7 streams, higher diversity was found more often in downstream sites. Macroinvertebrate functional feeding groups and life habits were similar between downstream and upstream sites. Downstream and baseline stream samples were similar. While some functional feeding group and life habit species richness categories varied, variations did not indicate poorer quality downstream communities. Imidacloprid treatments applied according to US Environmental Protection Agency federal restrictions did not result in negative effects to aquatic macroinvertebrate communities, which indicates that risks of imidacloprid use in forest settings are low. Environ Toxicol Chem 2017;36:3108-3119. © 2017 SETAC.

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Uptake and dissipation of neonicotinoid residues in nectar and foliage of systemically treated woody landscape plants

Mach

Bondarenko²,

Potter

2017

Enviro Toxic and Chemistry

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Systemic neonicotinoid insecticides used in urban arboriculture could pose a risk to bees and other pollinators foraging on treated plants. We measured uptake and dissipation of soil-applied imidacloprid and dinotefuran in nectar and leaves of 2 woody plant species, a broadleaf evergreen tree (Ilex × attenuata) and a deciduous shrub (Clethra alnifolia), to assess concentrations to which pollinators and pests might be exposed in landscape settings. Three application timings, autumn (postbloom), spring (prebloom), and summer (early postbloom), were evaluated to see if taking advantage of differences in the neonicotinoids' systemic mobility and persistence might enable pest control while minimizing transference into nectar. Nectar and tissue samples were collected from in-ground plants and analyzed for residues by high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) in 2 successive years. Concentrations found in nectar following autumn or spring applications ranged from 166 to 515 ng/g for imidacloprid and from 70 to 1235 ng/gg for dinotefuran, depending on plant and timing. These residues exceed concentrations shown to adversely affect individual- and colony-level traits of bees. Summer application mitigated concentrations of imidacloprid (8-31 ng/g), but not dinotefuran (235-1191 ng/g), in nectar. Our data suggest that dinotefuran may be more persistent than is generally believed. Implications for integrated pest and pollinator management in urban landscapes are discussed. Environ Toxicol Chem 2018;37:860-870. © 2017 SETAC.

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Spatial and Temporal Distribution of Residues of Imidacloprid and Its Insecticidal 5-Hydroxy and Olefin and Metabolites in Eastern Hemlock (Pinales: Pinaceae) in the Southern Appalachians

Cited by 25 publications

References 9 publications

Concentration Levels of Imidacloprid and Dinotefuran in Five Tissue Types of Black Walnut, Juglans nigra

Concentration Levels of Imidacloprid and Dinotefuran in Five Tissue Types of Black Walnut, Juglans nigra

Risk assessment of imidacloprid use in forest settings on the aquatic macroinvertebrate community

Uptake and dissipation of neonicotinoid residues in nectar and foliage of systemically treated woody landscape plants

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