Demographic parameters of the insecticide-exposed predator Podisus nigrispinus: implications for IPM

Castro, Ancidériton Antonio de; Poderoso, Júlio César Melo; Ribeiro, R. C.; Legaspi, Jesusa C.; Serrão, José Éduardo; Zanúncio, José Cola

doi:10.1007/s10526-014-9639-y

Cited by 23 publications

(13 citation statements)

References 55 publications

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“…The velvetbean caterpillar, Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) is the main defoliator on soybean plants ( Glycine max L. Merrill, Fabaceae) 1 . In Brazil, this pest occurs throughout the year, especially in the vegetative phase of plants and its control is realized mainly with synthetic insecticides 2–4 . Integrated Pest Management (IPM) programs aim at reducing the use of chemicals in pest control 1 due to the negative effects of these products on non-target organisms 5,6 and on the environment 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Toxicity and cytopathology mediated by Bacillus thuringiensis in the midgut of Anticarsia gemmatalis (Lepidoptera: Noctuidae)

Castro

Martínez

Barbosa

et al. 2019

Sci Rep

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Bioinsecticides and transgenic plants, based on Bacillus thuringiensis (Bt) toxins are important when managing Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), a soybean defoliator pest. The interaction of these toxins with the caterpillar’s midgut cells determines their efficacy as an insecticide. The objective was to evaluate the toxicity of B. thuringiensis , subsp . kurstaki strain HD-1 and cytopathological changes mediated by these bacterial toxins in the midgut of A. gemmatalis caterpillars. Insecticidal efficacy was determined by calculating lethal concentration values (LC 25 , LC 50 , LC 75 , LC 90 and LC 99 ) in the laboratory. Midgut fragments from A. gemmatalis were extracted after bacterial ingestion and evaluated by light, transmission electron and confocal microscopy. The Bt median lethal concentrations showed toxicity [LC 50 = 0.46 (0.43–0.49) mg mL −1 ] to fourth instar A. gemmatalis caterpillars after 108 hours. Bt induces severe cytotoxicity to A. gemmatalis midgut epithelial cells with increasing exposure over time, causing cellular disorganization, microvillus degeneration, cell fragmentation and protrusion, peritrophic membrane rupture, and cell vacuolization. The cell nuclei presented condensed chromatin and an increase in lysosome numbers. Apoptosis occurred in the midgut cells of caterpillars exposed to Bt. A regenerative response in A. gemmatalis caterpillars was observed 8 hours after exposure to Bt, however this response was not continuous. Toxins produced by Bt are harmful to A. gemmatalis at median concentration with structural damage and death of the midgut epithelial cells of this insect.

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Section: Introductionmentioning

confidence: 99%

Toxicity and cytopathology mediated by Bacillus thuringiensis in the midgut of Anticarsia gemmatalis (Lepidoptera: Noctuidae)

Castro

Martínez

Barbosa

et al. 2019

Sci Rep

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“…Spodoptera exigua and P . maculiventris mortality was determined 24 h after exposure; larvae (pest) and nymphs (predator) unable to walk up to 10 mm when released were considered dead [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

Lethal and behavioral effects of synthetic and organic insecticides on Spodoptera exigua and its predator Podisus maculiventris

et al. 2018

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BackgroundThe beet armyworm, Spodoptera exigua (Lepidoptera: Noctuidae), is a key insect pest of edible vegetables around the world and it is resistant to insecticide of different classes. Insecticides that are effective to this pest and selective to predator stinkbugs are required for the integrated management of S. exigua.MethodsThe toxicity of four commercial insecticide formulations azadirachtin + pyrethrin, spinosad, pyrethrin and chlorantraniliprole was tested on the target pest and their side effect were evaluated on the spined soldier bug, Podisus maculiventris (Heteroptera: Pentatomidae) through different bioassays.ResultsSpinosad and chlorantraniliprole were more toxic to S. exigua than to the predator P. maculiventris but opposite results were obtained for pyrethrin and azadirachtin + pyrethrin in contact toxicity bioassay. Chlorantraniliprole was the most toxic to S. exigua in oral toxicity bioassay, followed by spinosad, pyrethrin and azadirachtin + pyrethrin. Spinosad in oral toxicity bioassay was the most toxic to P. maculiventris, followed by pyrethrin, azadirachtin + pyrethrin and chlorantraniliprole. Spinosad caused irritability to the predator while pyrethrin to the pest. The insecticide repellency was not observed over the tested insect species. The synthetic insecticide chlorantraniliprole was less toxic than the natural pyrethrin, azadirachtin + pyrethrin and spinosad to the predator.ConclusionsThis work provides useful information on the combination of commercial insecticides with the predator P. maculiventris to controlling S. exigua in integrated pest management (IPM) programs.

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“…Acaricides are the main control strategy employed to deal with these pests in vegetable crops (Kousik et al, 2007); however, they may prove to be disadvantageous over the long-term (Razmjou et al, 2009) due to pest resistance (Maniania et al, 2008), interfering in the biological control (Moscardini et al, 2014;Castro et al, 2013Castro et al, , 2015 and increasing pest-related problems (Atakan, 2006;Leite et al, 2006). Therefore, intensive acaricide use should be minimized in pest control (Leite et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Preference of red mite Tetranychus ludeni Zacher (Acari: Tetranychidae) to sweet potato genotypes

et al. 2019

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Tetranychus ludeni damages the sweet potato. Pest development can vary between plant genotypes. The objective was to identify the preference of Tetranychus ludeni for Ipomoea batatas genotypes, from the germplasm bank at the Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM). Natural infestations of this mite were observed on 54 sweet potato genotypes in potted, in a greenhouse. Three mite-infested leafs of each genotype were collected and analyzed. The red mite showed different population density rate in genotypes. The BD 29 genotype was found to be highly susceptible, the BD 08, BD 57, BD 17 and Espanhola genotypes were moderately susceptible, and the others forty-nine genotypes showed low susceptibility to the mite.

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Demographic parameters of the insecticide-exposed predator Podisus nigrispinus: implications for IPM

Cited by 23 publications

References 55 publications

Toxicity and cytopathology mediated by Bacillus thuringiensis in the midgut of Anticarsia gemmatalis (Lepidoptera: Noctuidae)

Toxicity and cytopathology mediated by Bacillus thuringiensis in the midgut of Anticarsia gemmatalis (Lepidoptera: Noctuidae)

Lethal and behavioral effects of synthetic and organic insecticides on Spodoptera exigua and its predator Podisus maculiventris

Preference of red mite Tetranychus ludeni Zacher (Acari: Tetranychidae) to sweet potato genotypes

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