Interactions of Bacillus thuringiensis strains for Plutella xylostella (L.) (Lepidoptera: Plutellidae) susceptibility

Santos, Mariana Sanguinete; Dias, Naymã Pinto; Costa, Lílian Lúcia; Bortoli, Caroline Placidi De; Souza, Eduardo Henrique; Santos, Annelyse Cristina Ferreira; Bortoli, Sérgio Antônio De; Polanczyk, Ricardo Antônio

doi:10.1016/j.jip.2019.107255

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…In this context, symptoms in E. elaeasa caterpillars were consistent with the known effects of microbial disruption of insect midgut membranes. A set of results point to the effects on the digestive system of lepidopterous pests, such as Diatraea saccharalis Fabricius (Crambidae) [33], Plutella xylostella Linnaeus (Plutellidae) [34], and Spodoptera frugiperda JE Smith (Noctuidae) [35], after Bt-strains oral exposure. In general, few Bt-strains are effective against E. elaeasa at different concentrations and reinforce their use as an alternative to organophosphate insecticides on this species.…”

Section: Discussionmentioning

confidence: 99%

Insecticidal Activity of Bacillus thuringiensis Strains on the Nettle Caterpillar, Euprosterna elaeasa (Lepidoptera: Limacodidae)

Plata-Rueda

Quintero²,

Serrão

et al. 2020

Insects

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In the present work, we evaluated the insecticidal activity of Bacillus thuringiensis (Bt) strains on Euprosterna elaeasa as an alternative for the organophosphate insecticide use in oil palm plantations in the Americas. The toxic effects of four Bt-strains (HD-1 var. kurstaki, SA-12 var. kurstaki, ABTS-1857 var. aizawai, and GC-91 var. aizawai) were evaluated against E. elaeasa caterpillars for toxicity, survival, anti-feeding, and mortality in field-controlled conditions. The Bt-strains, ABTS-1857 var. aizawai (LC50 = 0.84 mg mL−1), GC-91 var. aizawai (LC50 = 1.13 mg mL−1), and HD-1 var. kurstaki (LC50 = 1.25 mg mL−1), were the most toxic to E. elaeasa. The caterpillar survival was 99% without exposure to Bt-strains, and decreased to 52–23% in insects treated with the LC50 and 10–1% in insects exposed to LC90 after 48 h. Furthermore, Bt-strains decreased significantly the consumption of oil palm leaves of E. elaeasa 3 h after exposure. Mortality of E. elaeasa caterpillars caused by Bt-strains had similar lethal effects in the laboratory and in field conditions. Our data suggest that Bt-strains have insecticidal activity against E. elaeasa and, therefore, have potential applications in oil palm pest management schemes.

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Section: Discussionmentioning

confidence: 99%

Insecticidal Activity of Bacillus thuringiensis Strains on the Nettle Caterpillar, Euprosterna elaeasa (Lepidoptera: Limacodidae)

Plata-Rueda

Quintero²,

Serrão

et al. 2020

Insects

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“…Given this scenario, approaches to manage or delay Bin resistance based on the association of L. sphaericus and Bti crystals have been developed ( Table 1 ). The combination of their active ingredients can offer advantages such as an enhanced spectrum of action, longer persistence, and a lower risk of resistance selection [ 246 , 281 , 284 , 285 , 286 ]. The treatment of mosquito breeding sites with Bti and L. sphaericus larvicides in rotation, integrated or not with LLINs, has been used to reduce the density of anophelines and to improve malaria control in Africa [ 252 , 254 , 287 , 288 , 289 , 290 ].…”

Section: Applications For Mosquito Controlmentioning

confidence: 99%

Bacterial Toxins Active against Mosquitoes: Mode of Action and Resistance

Silva-Filha

Romão

Rezende

et al. 2021

Toxins

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Larvicides based on the bacteria Bacillus thuringiensis svar. israelensis (Bti) and Lysinibacillus sphaericus are effective and environmentally safe compounds for the control of dipteran insects of medical importance. They produce crystals that display specific and potent insecticidal activity against larvae. Bti crystals are composed of multiple protoxins: three from the three-domain Cry type family, which bind to different cell receptors in the midgut, and one cytolytic (Cyt1Aa) protoxin that can insert itself into the cell membrane and act as surrogate receptor of the Cry toxins. Together, those toxins display a complex mode of action that shows a low risk of resistance selection. L. sphaericus crystals contain one major binary toxin that display an outstanding persistence in field conditions, which is superior to Bti. However, the action of the Bin toxin based on its interaction with a single receptor is vulnerable for resistance selection in insects. In this review we present the most recent data on the mode of action and synergism of these toxins, resistance issues, and examples of their use worldwide. Data reported in recent years improved our understanding of the mechanism of action of these toxins, showed that their combined use can enhance their activity and counteract resistance, and reinforced their relevance for mosquito control programs in the future years.

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Sub-lethal effects of a Bt-based bioinsecticide on the biological conditioning of Anticarsia gemmatalis

et al. 2021

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Interactions of Bacillus thuringiensis strains for Plutella xylostella (L.) (Lepidoptera: Plutellidae) susceptibility

Cited by 3 publications

References 14 publications

Insecticidal Activity of Bacillus thuringiensis Strains on the Nettle Caterpillar, Euprosterna elaeasa (Lepidoptera: Limacodidae)

Insecticidal Activity of Bacillus thuringiensis Strains on the Nettle Caterpillar, Euprosterna elaeasa (Lepidoptera: Limacodidae)

Bacterial Toxins Active against Mosquitoes: Mode of Action and Resistance

Sub-lethal effects of a Bt-based bioinsecticide on the biological conditioning of Anticarsia gemmatalis

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