Neonicotinoid insecticidal seed-treatment on corn contaminates interseeded cover crops intended as habitat for beneficial insects

Bredeson, Michael M.; Lundgren, Jonathan G.

doi:10.1007/s10646-018-02015-9

Cited by 20 publications

(15 citation statements)

References 45 publications

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“…This concentration in leaves is generally greater than what has been reported in the literature. Bredeson & Lundgren (2019) reported concentrations of 0.6-9.7 ng/g in leaves of cover crops interseeded with thiamethoxam-treated corn seed crops; Main et al (2017) reported clothianidin concentrations from below detection (0.002-0.66 ng/g)-2.01 ng/g in plants from wetlands bordering treated canola crops; Botías et al (2016) reported concentrations ranging from below detection (detection limit = 0.12 ng/g) to 11.45 ng/g in foliage of plants bordering treated oilseed rape fields; Basley & Goulson (2018) reported clothianidin concentrations ranging from below detection (0.2 ng/g)-48 ng/g in plants from the margins of clothianidin treated wheat fields; and Olaya-Arenas & Kaplan (2019) reported concentrations in milkweed plants (median less than the detection limit, 1.06 ng/g) ranging from below detection-56.5 ng/g. The results from these and Experiment 1 of the present study indicate that clothianidin concentrations in wild milkweed plants are generally not high enough to adversely affect monarch butterflies.…”

Section: Discussionmentioning

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: Discussionmentioning

confidence: 99%

Uptake and toxicity of clothianidin to monarch butterflies from milkweed consumption

Bargar

Hladik

Daniels

2020

PeerJ

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“…Neonicotinoid residues can be taken up from the soil by non‐target plants, such as wildflowers and inter‐seeded cover crops (Botías et al, 2015; Bredeson & Lundgren, 2019; Krupke, Hunt, Eitzer, Andino, & Given, 2012; Pecenka & Lundgren, 2015); these are important resources for pollinators, and could be a source of neonicotinoid exposure (Bretagnolle & Gaba, 2015; Mandelik, Winfree, Neeson, & Kremen, 2016). Since these non‐target plants were sampled during peak planting and crop production seasons, aerial deposition cannot be separated from uptake.…”

Section: Discussionmentioning

confidence: 99%

Ecological impacts of pesticide seed treatments on arthropod communities in a grain crop rotation

Dubey

Lewis

Dively

et al. 2020

Journal of Applied Ecology

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1. While many studies have investigated non-target impacts of neonicotinoid seed treatments (NSTs), they usually take place within a single crop and focus on specific pest or beneficial arthropod taxa.2. We compared the impacts of three seed treatments to an untreated control: imidacloprid + fungicide products, thiamethoxam + fungicide products and fungicide products alone in a 3-year crop rotation of full-season soybean, winter wheat, doublecropped soybean and maize. Specifically, we quantified neonicotinoid residues in the soil and in weedy winter annual flower buds and examined treatment impacts on soil and foliar arthropod communities as well as on plant growth and yield.3. Unquantifiably low amounts of insecticide were found in winter annual flowers of one species in one site year, which did not correspond with our treatments.Although low levels of insecticide residues were present in the soil, residues were not persistent. Residues were highest in the final year of the study, suggesting some accumulation.4. We observed variable impacts of NSTs on the arthropod community; principle response curve and redundancy analyses exhibited occasional treatment effects, with treatments impacting the abundance of various taxa, including predators and parasitoids. Overall, foliar taxa were more impacted than soil taxa, and the fungicides occasionally affected communities and individual taxa. 5. Pest pressure was low throughout the study, and although pest numbers were reduced by the insecticides, corresponding increases in yield were not observed.6. Synthesis and applications. Pesticide seed treatments can impact arthropod taxa, including important natural enemies even when environmental persistence and active ingredient concentrations are low. The foliar community in winter wheat showed that in some cases, these impacts can last for several months after planting. Given the low pest pressure and lack of yield improvement in full-season soybean, double-cropped soybean, winter wheat and maize, we did not observe benefits that could justify the risks associated with neonicotinoid seed treatment (NST) use. Our results suggest that NSTs are not warranted in Maryland grain production, outside of specific instances of high pest pressure. | 937Journal of Applied Ecology DUBEY Et al.

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“…The active usage of pesticides in agriculture and the decline in the growth of colonies of pollinating insects can be interrelated processes. Recent studies have shown that pesticides can affect on bumblebee colonies-An important and annually decreasing group of pollinators [71]. It has been shown that the effect of thiamethoxam, a neonicotinoid insecticide, on bumblebees reduces the proportion of incubating queens in the hive that lay eggs, and also increases the vulnerability of individuals to pathogenic microorganisms [72].…”

Section: Problem For Pollinatorsmentioning

confidence: 99%

The Effect of Pesticides on the Microbiome of Animals

et al. 2020

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In recent decades an increase in the use of pesticides to protect plants from pests, diseases and weeds has been observed. There are many studies on the effects of various pesticides on non-target organisms. This review aims to analyze and summarize published scientific data on the effects of pesticides on the animal microbiome. Pesticides can affect various parameters of the animal microbiome, such as the taxonomic composition of bacteria, bacterial biodiversity, and bacterial ratios and modify the microbiome of various organisms from insects to mammals. Pesticide induced changes in the microbiome reducing the animal’s immunity. The negative effects of pesticides could pose a global problem for pollinators. Another possible negative effect of pesticides is the impact of pesticides on the intestinal microbiota of bumblebees and bees that increase the body’s sensitivity to pathogenic microflora, which leads to the death of insects. In addition, pesticides can affect vitality, mating success and characteristics of offspring. The review considers methods for correcting of bee microbiome.

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Neonicotinoid insecticidal seed-treatment on corn contaminates interseeded cover crops intended as habitat for beneficial insects

Cited by 20 publications

References 45 publications

Uptake and toxicity of clothianidin to monarch butterflies from milkweed consumption

Uptake and toxicity of clothianidin to monarch butterflies from milkweed consumption

Ecological impacts of pesticide seed treatments on arthropod communities in a grain crop rotation

The Effect of Pesticides on the Microbiome of Animals

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