Uptake and translocation of imidacloprid, clothianidin and flupyradifurone in seed‐treated soybeans

Stamm, M. D.; Heng-Moss, Tiffany; Baxendale, F. P.; Siegfried, Blair D.; Blankenship, Erin E.; Nauen, Ralf

doi:10.1002/ps.4152

Cited by 38 publications

(37 citation statements)

References 40 publications

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“…For oilseed rape seeds treated with clothianidin, plant bioavailability was 6% of clothianidin present in soil residues . These findings are consistent with similar resorption studies of imidacloprid in crop plants (Stamm et al 2016;Sur and Stork 2003), thus confirming that the bulk of systemic insecticides in coated seeds remains in the soil of the field. These findings raise serious questions about the poor efficiency of the system and the inevitable environmental contamination they produce Goulson 2013;Sánchez-Bayo 2017).…”

Section: Plants and Apicultural Producesupporting

confidence: 88%

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An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 1: new molecules, metabolism, fate, and transport

Giorio

Safer

Sánchez‐Bayo

et al. 2017

Environ Sci Pollut Res

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With the exponential number of published data on neonicotinoids and fipronil during the last decade, an updated review of literature has been conducted in three parts. The present part focuses on gaps of knowledge that have been addressed after publication of the Worldwide Integrated Assessment (WIA) on systemic insecticides in 2015. More specifically, new data on the mode of action and metabolism of neonicotinoids and fipronil, and their toxicity to invertebrates and vertebrates, were obtained. We included the newly detected synergistic effects and/or interactions of these systemic insecticides with other insecticides, fungicides, herbicides, adjuvants, honeybee viruses, and parasites of honeybees. New studies have also investigated the contamination of all environmental compartments (air and dust, soil, water, sediments, and plants) as well as bees and apicultural products, food and beverages, and the exposure of invertebrates and vertebrates to such contaminants. Finally, we review new publications on remediation of neonicotinoids and fipronil, especially in water systems. Conclusions of the previous WIA in 2015 are reinforced; neonicotinoids and fipronil represent a major threat worldwide for biodiversity, ecosystems, and all the services the latter provide.

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Section: Plants and Apicultural Producesupporting

confidence: 88%

“…Stamm et al (2016) studied the uptake and translocation of imidacloprid, clothianidin, and flupyradifurone in seed-treated soybeans. They found that the novel flupyradifurone is absorbed at a higher rate during the early growth stage of the plant compared to clothianidin and imidacloprid.…”

Section: Plants and Apicultural Producementioning

confidence: 99%

An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 1: new molecules, metabolism, fate, and transport

Giorio

Safer

Sánchez‐Bayo

et al. 2017

Environ Sci Pollut Res

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“…Aside from the control by direct contact with the whitefly nymphs, systemic insecticides such as neonicotinoids (e.g., imidacloprid, acetamiprid, and thiamethoxam, commonly used for the control of hemipteran pests in Brazil) present high levels of vascular translocation inside the soybean plant (Stamm et al, 2016), being ingested by the whitefly nymph through its feeding and thus increasing the possibilities of control. Although more efficient when the insecticide is applied as seed treatment (Magalhaes et al, 2009), this effect may also be achieved via foliar application as long as the middle and lower thirds of the soybean plants are reached by the spraying, as the translocation of systemic insecticides occurs primarily from older to younger leaves (Bennett, 1957;Buchholz & Nauen, 2002).…”

Section: Implications On Sampling and Control Methods Of Bemisia Tabacimentioning

confidence: 99%

Distribution of Bemisia tabaci within soybean plants and on individual leaflets

Filho

Guedes

Ferreira

et al. 2019

Entomologia Exp Applicata

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To control whiteflies on soybean crops in an effective and economically viable way, it is necessary to quantify the occurrence and density of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) on the leaflets. Estimating the number of B. tabaci cm‐2 on leaflets is difficult, because its distribution pattern on the various parts of the plant canopy and on the leaflet surface is unknown. The aim of this study was to evaluate the distribution of B. tabaci nymphs on soybean plants and leaflets, under greenhouse and field conditions. One hundred soybean plants infested with all nymph stages were randomly selected in a greenhouse, and 25 in a field. Of each plant, a trifoliate leaf of the middle third of the plant’s height was selected and its central leaflet was collected (greenhouse experiment), or a trifoliate leaf of each third layer (upper, middle, and lower), of which the left, central, and right leaflets were collected (field experiment). The collected leaflets were divided into 32 sections (1 cm2 per section), arranged in an array of eight rows and four columns to count whitefly nymphs. The Morisita index (Iδ), the negative binomial parameter k, and the dispersion index (I) were calculated for each leaflet, using the number of nymphs as variable. The highest population densities of whitefly nymphs were found in the middle third of the soybean plants. In leaflets from the middle third, the nymphs concentrated in the middle and bottom parts of the leaflets, whereas in the upper and lower thirds of the plant, they were randomly distributed on the leaflets.

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“…Sequential sprays are particularly important for the performance of pyrethroid insecticides, which rely basically on fast knockdown effect (Salgado, 2013); neonicotinoids, on the other hand, provide longer residual effect allied to robust plant sistemicity (Stamm et al, 2016), which may be linked to a higher control efficiency of nymphs, as observed in some of the treatments (e.g., acetamiprid in treatment T1). Whitefly nymphs infesting soybean are concentrated in the middle and lower thirds of the plants (Czepack et al, 2018), in the abaxial side of the leaflets and in the middle and bottom areas of its surface (Pozebon et al, 2019), due to the female's habit of feeding and ovipositing in the upper and younger leaves of the soybean plants; therefore, B. tabaci adults are more exposed to direct contact with the insecticide spray, while the control of the sheltered nymphs relies more heavily on the efficacy of the insecticide translocation inside the plant.…”

Section: Combined Analysismentioning

confidence: 99%

Managing Whitefly on Soybean

Arnemann¹,

Marques²,

Ferreira³

et al. 2019

JAS

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The whitefly Bemisia tabaci (Gennadius, 1889) is a major pest species in soybean, leading to severe economic losses on this crop due to the difficulties involved on its management. Previously restricted to the Middle-west and Southeast regions of Brazil, whitefly infestations have steadily increased in the Southern state of Rio Grande do Sul, the third biggest soybean growing region of the country. Control failures and scarcity of updated information have led Brazilian soybean growers to raise excessively the number of sprays per crop season, increasing control costs and jeopardizing the long-term sustainbility of this strategy due to selection of resistant strains and potential harmful effects on the environment. The aim of this work was to evaluate the performance of different chemical insecticides in the control of B. tabaci nymphs and adults on soybean crops in two different sites, under the field conditions faced by the growers in the state of Rio Grande do Sul. The most efficient treatment for the control of B. tabaci adults was cyantraniliprole + lambda-cyhalothrin, at the doses of 100 + 7.5 g a.i. ha-1, which provided 65% of average control efficiency. As for nymph control, the most efficient treatment was acetamiprid + pyriproxyfen, at the doses of 60 + 30 g a.i. ha-1, which resulted in 67% of whitefly control in average. Two sequential sprays beginning at the infestation onset are recommended in order to enhance control efficiency.

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Uptake and translocation of imidacloprid, clothianidin and flupyradifurone in seed‐treated soybeans

Abstract: This study enhances our understanding of the uptake and distribution of insecticides used as seed treatments in soybean. The uptake and translocation of these insecticides differed in response to soil moisture stress. © 2015 Society of Chemical Industry.

Cited by 38 publications

References 40 publications

An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 1: new molecules, metabolism, fate, and transport

An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 1: new molecules, metabolism, fate, and transport

Distribution of Bemisia tabaci within soybean plants and on individual leaflets

Managing Whitefly on Soybean

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