Thiamethoxam on the histological characteristics of sugarcane young roots

Martins, Raphael Gonçalves; Martins, Maria Bernadete Gonçalves; Silva, João Marcelo; Pereira, Marcelo Andrade Departamento de Ciências Biológicas; Appezzato-da-Glória, Beatriz Departamento de Ciências Biológicas; Castro, Paulo de Camargo e Departamento de Ciências Biológicas Roberto

doi:10.1590/s0103-84782012005000090

Cited by 6 publications

(9 citation statements)

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“…In the present study, the management strategy combining glyphosate and thiamethoxam applied via foliar spraying produced sugarcane with greater vigor and development compared with application of glyphosate alone. Martins et al 20 attributed these improvements to the increases in foliar area, root length, cortical thickness, vascular cylinder diameter, and the number of metaxylem in vascular bundles mediated by thiamethoxam. These changes improve the efficiency of the roots in fixing, capturing, and transporting water and nutrients.…”

Section: Discussionmentioning

confidence: 99%

“…Thiamethoxam induces plant defense mechanisms against stress, improving the plant's ability to face adverse conditions, including the phytotoxic effects of applying glyphosate as a ripener. 16 Ford et al, 22 Macedo and Castro, 17 Martins et al, 20 and Macedo et al 16 Figure 5. Total recoverable sugars (TRS) in sugarcane affected by glyphosate (ripener) and thiamethoxam (bioactivator) at cane ratoon regrowth.…”

Section: Discussionmentioning

confidence: 99%

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Phytotonic effects of thiamethoxam on sugarcane managed with glyphosate as a ripener

Silva

Oliveira

et al. 2022

Pest Management Science

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BACKGROUND Thiamethoxam and glyphosate are widely used in sugarcane production as an insecticide and ripener, respectively. In this study, the potential of these chemical products to also elicit phytotonic effects and enhance the physiological development and yield of sugarcane was evaluated. In field experiments, thiamethoxam and glyphosate were applied to sugarcane individually or in combination, and the effects of these chemical management strategies on sugarcane biometric and technological parameters were assessed. RESULTS Thiamethoxam application improved biometric parameters, especially stalk yield. Glyphosate application increased sugar yield, despite reducing the number of stalks and consequently the stalk yield. CONCLUSIONS Application of the insecticide thiamethoxam to sugarcane attenuates the depreciative effect of ripener (glyphosate) and has a potential phytotonic effect by increasing sugar yields in the early and late seasons. © 2022 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Phytotonic effects of thiamethoxam on sugarcane managed with glyphosate as a ripener

Silva

Oliveira

et al. 2022

Pest Management Science

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“…This active ingredient showed positive effects, such as better expression of vigour during germination, biomass accumulation, high photosynthetic rate, and better penetration of roots as well asstimulation of root growth (Cataneo, 2008). Also, in the initial phase of root growth, thiamethoxam showed greater development of cortex cells and greater growth of vascular cylinder, which may favour the establishment of plants (Martins et al, 2012). According to Dragičević et al (2011), pesticide treatment provokes decrease in hydrolysis and simultaneous increase in biosynthesis.…”

Section: Accelerated Ageing Testmentioning

confidence: 99%

Viability and vigour of different maize (Zea mays L.) inbred lines treated with neonicotinoids

Tamindžić¹,

Nikolić²,

Milošević³

et al. 2016

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The aim of this study was to examine the effects of different neonicotinoid seed treatments on viability and vigour of maize (Zea mays L.) inbred lines. The trial included three maize inbred lines (207 x 312/5 DNS, 7-1 NS, and 312/5 DNS) treated with recommended doses of three commercial formulations of systemic insecticides (Poncho 600-FS, Gaucho 600-FS, and Cruiser 350-FS). Generally, formulation Gaucho 600-FS can be considered the most harmful regarding the impact on the reduction of germination in all tested maize inbred lines. A significant reduction of germination in maize inbred line 7-1 NS was observed after seed treatment with Cruiser 350-FS, using the standard germination test and cold test. A significant increase in seedlings root and shoot growth of maize inbred line 312/5 DNS treated with Poncho 600-FS and Cruiser 350-FS was noted using the cold test.

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“…In coffee, there were morphological changes 25 resembling the effects of the plant regulators used during the initial growth stage 26–28 . However, studies on the plant‐stimulating properties of thiamethoxam and its relationship with insects are generally lacking, 29 as researchers usually emphasize the morphophysiological changes observed in plants treated with thiamethoxam 30–33 . Thus, this article will focus on thiamethoxam's potential as a bioactivator for such plants as coffee 13 …”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28] However, studies on the plant-stimulating properties of thiamethoxam and its relationship with insects are generally lacking, 29 as researchers usually emphasize the morphophysiological changes observed in plants treated with thiamethoxam. [30][31][32][33] Thus, this article will focus on thiamethoxam's potential as a bioactivator for such plants as coffee. 13 The objective of this study was to assess the effect of increasingly higher doses of thiamethoxam on the vegetative vigor of coffee seedlings, and to ascertain its efficacy against the coffee leaf miner.…”

Section: Introductionmentioning

confidence: 99%

The effects of thiamethoxam on coffee seedling morphophysiology and Neotropical leaf miner (Leucoptera coffeella) infestations

Leite

Guedes

Costa

et al. 2022

Pest Management Science

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BACKGROUND: Coffee (Coffea arabica L.) is one of the main commodities produced in Brazil. Insecticides like the (systemic) neonicotinoid thiamethoxam are widely used to suppress pest populations during coffee production, in particular the Neotropical leaf miner (Leucoptera coffeella Guérin-Mèneville & Perrottet, 1842) (Lepidoptera: Lyonetiidae). In addition to its efficacy against this pest species, thiamethoxam is also thought to be a bioactivator of plant metabolism, but has not yet been tested for such activity. Thus, the objectives of the present study were (1) to assess the concentration-response effects of thiamethoxam on the vegetative vigor of coffee seedlings (C. arabica 'Catuaí 144' cultivar) at different concentrations [2, 20, 40, 80 and 200 mg active ingredient (a.i.) kg −1 ] applied via soil drenching and (2) to evaluate if the plant response interferes with the effectiveness of thiamethoxam in controlling leaf miner populations. The morphophysiological traits of the coffee seedlings were evaluated 20, 40, 60 and 80 days after application, and leaf miner infestations were recorded starting 20 days after the insecticide application with the releasing of adults, and every 20 days afterwards. RESULTS:The results indicated that thiamethoxam has a deleterious effect on the morphophysiological traits of the plants compromising their development with increase in concentrations. However, leaf area exhibited a different pattern with a peak at 50 mg a.i. kg −1 consistent with thiamethoxam-induced hormesis (i.e. biphasic response with stimulatory effect at sublethal range of a toxic substance at the higher concentration). Nonetheless, such bioactivator effect did not affect thiamethoxan effectiveness against the leaf miner even at the lowest concentration tested. CONCLUSION: Thiamethoxan exhibited bioactivation effect on leaf at low concentration, but without compromising efficacy against leaf miner populations. Therefore, its proposed metabolism-boosting properties may encourage the unnecessary use of this insecticide, potentially leading to higher selection for insecticide resistance and an eventual decline in its effectiveness against the Neotropical leaf miner.

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Thiamethoxam on the histological characteristics of sugarcane young roots

Abstract: Thiamethoxam is a systemic insecticide from the neonicotinoid group, nitroguanidin family which affects the nicotinic receptor acetyl choline in the insect

Cited by 6 publications

References 6 publications

Phytotonic effects of thiamethoxam on sugarcane managed with glyphosate as a ripener

Phytotonic effects of thiamethoxam on sugarcane managed with glyphosate as a ripener

Viability and vigour of different maize (Zea mays L.) inbred lines treated with neonicotinoids

The effects of thiamethoxam on coffee seedling morphophysiology and Neotropical leaf miner (Leucoptera coffeella) infestations

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