Exposure to chlorantraniliprole reduces locomotion, respiration, and causes histological changes in the midgut of velvetbean caterpillar Anticarsia gemmatalis (Lepidoptera: Noctuidae)

Castro, Bárbara Monteiro de Castro e; Martínez, Luis Carlos; Plata-Rueda, Angélica; Soares, Marcus Alvarenga; Wilcken, Carlos Frederico; Zanuncio, Antônio José Vinha; Fiaz, Muhammad; Zanúncio, José Cola; Serrão, José Éduardo

doi:10.1016/j.chemosphere.2020.128008

Cited by 28 publications

(21 citation statements)

References 52 publications

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“…In contrast, moderate feeding inhibition after exposure to fenoxycarb and pyriproxyfen has been reported in Abraxas suspecta Warren (Geometridae) [42] and Spodoptera litoralis Boisduval (Noctuidae) [43], respectively. The findings obtained here of a reduction in food consumption by E. elaeasa larvae, in both lethal concentrations, indicates a possible poisoning per os, perhaps due to alterations in the midgut [21], affecting digestive enzymes secretion [44] and energy metabolism [45] with possible suppression of the detoxification response [43,46], as observed in other insects after oral insecticide exposure [47][48][49][50][51]. In summary, the reduction in food consumption caused by IGRs on treated E. elaeasa larvae suggests feeding inhibition impairing the digestive process.…”

Section: Discussionsupporting

confidence: 53%

Effects of Insect Growth Regulators on Mortality, Survival, and Feeding of Euprosterna elaeasa (Lepidoptera: Limacodidae) Larvae

2021

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The potential of insecticides that affect the growth and insect development to control Euprosterna elaeasa was evaluated. Fenoxycarb, methoxyfenozide, pyriproxyfen, and tebufenozide were assessed against E. elaeasa larvae for toxicity, survivorship, and feeding inhibition in the laboratory, and mortality in semifield conditions. Concentration–mortality bioassays demonstrated that insect growth regulators (IGRs) have a lethal effect on this insect, with pyriproxyfen (LC50 = 0.141 g L−1) being the most effective, followed by fenoxycarb (LC50 = 0.199 g L−1), methoxyfenozide (LC50 = 0.233 g L−1), and tebufenozide (LC50 = 0.259 g L−1). The survival rate was 99.8% in the control group, compared to 44.6%, 42.9%, 42.2%, and 39.5% in insects treated with pyriproxyfen, fenoxycarb, methoxyfenozide, and tebufenozide, respectively. IGRs caused feeding inhibition in E. elaeasa larvae 3 h after exposure. Furthermore, mortality in semifield conditions was similar to the results found in the laboratory. Our findings suggest that fenoxycarb, methoxyfenozide, pyriproxyfen, and tebufenozide are effective against E. elaeasa and, therefore, we confirm the potential of these IGRs for the control of this pest.

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Section: Discussionsupporting

confidence: 53%

Effects of Insect Growth Regulators on Mortality, Survival, and Feeding of Euprosterna elaeasa (Lepidoptera: Limacodidae) Larvae

2021

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“…This decrease might be due to the low behavioral response and locomotor activity. Higher levels of walking activity are expected to result in metabolism with a high respiration rate [ 29 , 51 ]. The decrease in the oxygen consumption observed here may be related to the disruption of oxidative phosphorylation in respiration [ 49 , 51 , 52 ], and may result in unbalanced physiology of the insect.…”

Section: Discussionmentioning

confidence: 99%

“…The histological changes found are characteristic of a degenerative cellular process, such as disorganization of the striated border, cytoplasm vacuolization, and cell fragmentation. In the midgut, cell degeneration is described in other insects, such as Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) in response to chlorpyrifos [ 50 ] and chlorantraniliprole [ 51 ], Apis mellifera Linnaeus (Hymenoptera: Apidae) to iprodione [ 56 ] and spiromesifen [ 57 ], Podisus nigrispinus Dallas (Hemiptera: Pentatomidae) to permethrin [ 21 ] and spinosad [ 22 ], and Aedes aegypti (Diptera: Culicidae) to pyriproxyfen [ 30 ]. The histo-toxic effects in the midgut of S. frugiperda exposed to deltamethrin are mainly damages in the striated border of the digestive cells and in the peritrophic matrix.…”

Section: Discussionmentioning

confidence: 99%

Deltamethrin-Mediated Effects on Locomotion, Respiration, Feeding, and Histological Changes in the Midgut of Spodoptera frugiperda Caterpillars

Vinha

Plata-Rueda

Soares

et al. 2021

Insects

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Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is the main pest of maize crops, and effective methods for pest management are needed. The insecticidal efficacy of deltamethrin was evaluated against S. frugiperda for toxicity, survival, locomotion, anti-feeding, and histological changes in the midgut. Concentration–mortality bioassays confirmed that deltamethrin (LC50 = 3.58 mg mL−1) is toxic to S. frugiperda caterpillars. The survival rate was 99.7% in caterpillars not exposed to deltamethrin, decreasing to 50.3% in caterpillars exposed to LC50, and 0.1% in caterpillars treated with LC90. Spodoptera frugiperda demonstrated reduced mobility on deltamethrin-treated surfaces. Deltamethrin promoted a low respiration rate of S. frugiperda for up to 3 h after insecticide exposure, displaying immobilization and inhibiting food consumption. Deltamethrin induces histological alterations (e.g., disorganization of the striated border, cytoplasm vacuolization, and cell fragmentation) in the midgut, damaging the digestive cells and peritrophic matrix, affecting digestion and nutrient absorption.

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“…These time differences occur due to OEO components' abilities to ingress the insect's body during respiration [20] and penetrate the integument cuticle layers [15], exerting their effect as neurotoxins [17]. Similar effects were investigated in other pests of stored grains exposed to OEO, such as Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae) [53], Anagasta khueniella Zeller (Lepidoptera: Pyralidae) [54] and Rhyzopertha dominica Fabricius (Coleoptera: Bostrichidae) [55]. The rapid effect against T. molitor is another indication of the potential of OEO to protect stored products.…”

Section: Discussionmentioning

confidence: 99%

Origanum vulgare Essential Oil against Tenebrio molitor (Coleoptera: Tenebrionidae): Composition, Insecticidal Activity, and Behavioral Response

Plata-Rueda

Zanuncio

Serrão

et al. 2021

Plants

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Tenebrio molitor is one of the main stored product pests. This study characterized oregano essential oil (OEO) by gas chromatography (GC/FID and GC/MS) and assessed its insecticidal properties against T. molitor. Mortality, survival, respiration, and behavioral response in larva, pupa, and adult of this insect were determined. The major components of OEO were carvacrol (25.6%), p-cymene (12.3%), linalool (8.71%), thymol (7.22%), γ-terpinene (7.21%), caryophyllene oxide (4.67%), α-pinene (2.71%), and eucalyptol (2.69%). OEO caused high contact toxicity in larvae (LD50 = 3.03 µg insect–1), pupae (LD50 = 5.01 µg insect–1), and adults (LD50 = 5.12 µg insect−1) of T. molitor. Survival rates were 100% in larvae, pupae, and adults of T. molitor not treated with OEO, declining to 65–54%, 38–44%, 30–23%, and 6–2% in insects treated with LD25, LD50, LD75, and LD90, respectively. Low respiration rates of T. molitor at different developmental stages was observed after OEO exposure. Additionally, OEO exposure affects behavioral avoidance response and causes repellency in larvae and adults. These findings show that OEO exerts insecticidal and repellent effects against T. molitor, suggesting a potent alternative to synthetic insecticides for controlling the beetle.

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Exposure to chlorantraniliprole reduces locomotion, respiration, and causes histological changes in the midgut of velvetbean caterpillar Anticarsia gemmatalis (Lepidoptera: Noctuidae)

Cited by 28 publications

References 52 publications

Effects of Insect Growth Regulators on Mortality, Survival, and Feeding of Euprosterna elaeasa (Lepidoptera: Limacodidae) Larvae

Effects of Insect Growth Regulators on Mortality, Survival, and Feeding of Euprosterna elaeasa (Lepidoptera: Limacodidae) Larvae

Deltamethrin-Mediated Effects on Locomotion, Respiration, Feeding, and Histological Changes in the Midgut of Spodoptera frugiperda Caterpillars

Origanum vulgare Essential Oil against Tenebrio molitor (Coleoptera: Tenebrionidae): Composition, Insecticidal Activity, and Behavioral Response

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