Efficacy of entomopathogenic nematodes in insect cadaver formulation against engorged females of Rhipicephalus microplus (Acari: Ixodidae) in semi-field conditions

Monteiro, Caio Márcio de Oliveira; Coelho, Letícia; Paula, Luiza Gabriella Ferreira de; Fernandes, Éverton K. K.; Dolinski, Cláudia; Bittencourt, Vânia Rita Elias Pinheiro; Furlong, John; Prata, Márcia Cristina de Azevedo

doi:10.1016/j.ttbdis.2019.101313

Cited by 12 publications

(17 citation statements)

References 33 publications

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“…H. bacteriophora was applied to the plots by using infected cadavers of T. molitor larvae, as documented in previous studies 20,40 . Therefore, 1 week before the experiment had begun, eight T. molitor larvae infected with H. bacteriophora were separately and buried (5 cm depth) in the soil at random points within each plot 7 . The plots of the control group did not receive any treatment.…”

Section: Methodsmentioning

confidence: 99%

“…The mutualistic association between EPNs and pathogenic bacteria is responsible for causing rapid septicemia and death of infected arthropods, including ticks 5,6 . Because EPNs inhabit the soil, where 95% of the tick population is found, EPNs may be promising candidates for biological control of ticks in infested pastures 6–9 …”

Section: Introductionmentioning

confidence: 99%

“…Cattle tick control with EPNs may be achieved by application of infective juveniles (IJs) to infested pastures 7 or parasitized animals 27 . The application of EPNs to control cattle ticks in infested pastures targets engorged females that have dropped off the host and are seeking micro‐environments with high humidity and protected from solar radiation for oviposition.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, the application of IJs present in insect cadavers on the soil has shown promising results against R . microplus 7 . In this approach, insect cadavers colonized with EPNs are released in the environment and serve as inoculum sources that release IJs in the soil 7,20,28,29 …”

Section: Introductionmentioning

confidence: 99%

“…microplus 7 . In this approach, insect cadavers colonized with EPNs are released in the environment and serve as inoculum sources that release IJs in the soil 7,20,28,29 …”

Section: Introductionmentioning

confidence: 99%

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From the laboratory to the field: efficacy of entomopathogenic nematodes to control the cattle tick

Gomes

Matos²,

Barreto

et al. 2022

Pest Management Science

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BACKGROUND:The control of ticks is challenged by the resistance of tick populations to chemical acaricides. In this study, we evaluated, under laboratory conditions, the efficacy of Heterorhabditis bacteriophora against Rhipicephalus (Boophilus) microplus engorged females with varying body weights (150, 200, 250, 300 or 350 mg per female) or from eight different geographical populations. We also determined the efficacy of H. bacteriophora for tick control under field conditions. RESULTS: R. microplus engorged females with varying body weights exposed to 150 juveniles of H. bacteriophora resulted in a high control efficacy (97.5% to 98.4%). Tests with females from different geographical populations comprised eight tick strains treated with H.bacteriophoraandtheirrespectivecontrolgroups.Thebiologicalparametersoffemalesexposedtonematodetreatmentsdidnotdiffer significantly and resulted in 89% to 99% of control efficacy. Trials conducted under field conditions were performed in field plots with Megathyrsusmaximusgrass.TreatmentgroupsreceivedeightcadaversofTenebriomolitorfully colonizedwithH.bacteriophoraat1 week prior to the release of female ticks, whereas control groups were untreated. On the first day of the experiment, six engorged females were distributed in each plot. On day 42 and day 63, the apical portion of the grasses with R. microplus larvae were collected and quantified. The population of R. microplus larvae was reduced up to 73.1% in plots treated with H. bacteriophora at day 63 after treatment. CONCLUSION: R. microplus engorged females with varying body weights or from different geographical populations were highly susceptible to H. bacteriophora. The field test demonstrated the efficacy of H. bacteriophora in reducing R. microplus larvae in infested pastures.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…microplus 7 . In this approach, insect cadavers colonized with EPNs are released in the environment and serve as inoculum sources that release IJs in the soil 7,20,28,29 …”

Section: Introductionmentioning

confidence: 99%

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