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Bioassay Method for Toxicity Studies of Toxic Bait Formulations to Ceratitis capitata (Diptera: Tephritidae)

  • C A Baronio
  • D Bernardi
  • M Z Nunes
  • J Pasinato
  • F R M Garcia
  • M Botton
Pest Management
  • 13 Downloads

Abstract

The development of appropriate methodologies for bioassays is of paramount importance to study the methodological factors that may interfere in the experimental design. Thus, laboratory bioassays have become increasingly important for the determination of data that are realistic and replicable. The objective of the study was to develop a bioassay methodology with the ready-to-use toxic bait Success™ 0.02CB, 96 mg L−1 of spinosad, in adults of Ceratitis capitata (Wiedemann) as a study model. The insect origin (laboratory population, LT50 = 11.16 h), time of toxic bait supply (4 h, LT50 = 16.85 h), food deprivation (12 h, LT50 = 15.55 h), and the adult age (5 days, LT50 = 35.31 h) of C. capitata showed higher susceptibility and a shorter LT50 lethal time to the Success™ 0.02CB toxic bait. However, the absence or presence of a food source (LT50 ≈ 31.17 h) during the bioassay did not affect the susceptibility of C. capitata. Further, adults of C. capitata who were deprived and in the absence of a food source (artificial diet) had higher consumption of toxic baits (mg) during treatment exposure. The use of a 12-h deprivation period, toxic baits offered for 4 h, and absence of an artificial diet for adults of C. capitata at 5 days of age during the bioassay are considered adequate for evaluating formulations of toxic baits under laboratory conditions.

Keywords

Toxicity methodology spinosad Mediterranean fruit fly 

Notes

Acknowledgments

The first author gratefully acknowledges the National Council for Scientific and Technological Development (CNPQ) for a doctoral scholarship supporting research funding.

Author Contributions

CAB planned, designed, and executed the experimental work and wrote the manuscript; DB conducted the data analyses and wrote the manuscript, MZN and JP planned and executed the experimental work, and FRMG and MB wrote the manuscript.

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Copyright information

© Sociedade Entomológica do Brasil 2018

Authors and Affiliations

  • C A Baronio
    • 1
  • D Bernardi
    • 1
    • 2
  • M Z Nunes
    • 1
  • J Pasinato
    • 3
  • F R M Garcia
    • 1
  • M Botton
    • 3
  1. 1.Depto de Fitossanidade, Faculdade de AgronomiaUniv Federal de PelotasPelotasBrasil
  2. 2.Dept of EntomologyEmbrapa Clima TemperadoPelotasBrasil
  3. 3.Embrapa Uva e VinhoBento GonçalvesBrasil

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