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Rearing two fruit flies pests on artificial diet with variable pH.

N P Dias1, D E Nava2, G Smaniotto3

  • 1Departamento de Fitossanidade, Universidade Federal de Pelotas - UFPel, Campus Universitário, Avenida Eliseu Maciel, s/n, CEP 96010-900, Pelotas, RS, Brasil.

Brazilian Journal of Biology = Revista Brasleira De Biologia
|April 26, 2018
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Summary
This summary is machine-generated.

Fruit fly pest control was studied using artificial diets with varying pH levels. Optimal pH is crucial for larval development and adult performance of Anastrepha fraterculus and Ceratitis capitata.

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Area of Science:

  • Entomology
  • Pest Management
  • Insect Physiology

Background:

  • Fruit flies (Diptera: Tephritidae) are significant global fruit pests.
  • Anastrepha fraterculus and Ceratitis capitata are key fruit fly species in Brazil.
  • Understanding dietary requirements is vital for effective pest control strategies.

Purpose of the Study:

  • To investigate the impact of artificial diet pH on the larval development and adult performance of two major fruit fly species.
  • To determine the optimal pH range for rearing Anastrepha fraterculus and Ceratitis capitata in laboratory settings.

Main Methods:

  • Laboratory experiments were conducted at controlled conditions (25 ± 2 °C, 70 ± 10% RH, 12:12h L:D).
  • Semisolid artificial diets with pH adjusted using hydrochloric acid (pH 1.0 to 6.0) were tested.
  • Larval development, pupation, adult emergence, sex ratio, and longevity were assessed for both species.

Main Results:

  • A diet pH of 6.0 failed to support larval development for both fruit fly species.
  • Highly acidic diets (lower pH) inhibited egg, larval, and pupal development, as well as adult reproduction in Anastrepha fraterculus.
  • Ceratitis capitata showed greater sensitivity to diet pH, impacting larval duration, viability, pupal numbers, sex ratio, and male longevity.

Conclusions:

  • Dietary pH significantly affects the development and performance of Anastrepha fraterculus and Ceratitis capitata.
  • Extremely acidic conditions are detrimental to fruit fly development and reproduction.
  • Ceratitis capitata is more susceptible to variations in artificial diet pH than Anastrepha fraterculus, offering potential for species-specific control strategies.