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25 July 2018 Effects of Larval Density and Support Substrate in Liquid Diet on Productivity and Quality of Artificially Reared Anastrepha ludens (Diptera: Tephritidae)
Carlos Pascacio-Villafán, Larissa Guillén, Trevor Williams, Martín Aluja
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Abstract

The larval developmental environment can affect the quality of artificially reared insects used in pest control programs that apply the sterile insect technique. We used a liquid larval diet lacking corncob fractions (an ingredient which may be contaminated by toxins that inhibit larval development and drastically reduce insect production in mass-rearing facilities) to examine quality indicators of Anastrepha ludens (Loew) (Diptera: Tephritidae) as a function of larval density (1–5 larvae per ml of diet) and on two types of supporting materials (synthetic sponge and carpet felt) compared with a standard solid diet with corncob fractions inoculated with a fixed quantity of A. ludens eggs. Pupal weight and adult emergence of A. ludens reared on a liquid artificial diet were negatively and positively density dependent, respectively. One tray of solid diet produced an average (95% CI) of 689.5 (594.4, 794.3) pupae, whereas one tray of liquid diet with synthetic sponge and carpet felt produced an average of 266.0 (208.7, 332.9) and 43.7 (23.2, 73.9) pupae, respectively. Pupal weight and adult emergence of flies reared on the solid diet were atypically low probably due to the type of rearing tray used, whereas pupal weight and adult emergence on liquid diet were equal to, or exceeded 20 mg and a proportion of 0.93, respectively. The highest proportion of adults capable of flight was observed in the liquid diet with carpet felt. The potential causes by which larval density and support substrate affected productivity and quality of A. ludens reared on liquid diet are discussed.

© The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Carlos Pascacio-Villafán, Larissa Guillén, Trevor Williams, and Martín Aluja "Effects of Larval Density and Support Substrate in Liquid Diet on Productivity and Quality of Artificially Reared Anastrepha ludens (Diptera: Tephritidae)," Journal of Economic Entomology 111(5), 2281-2287, (25 July 2018). https://doi.org/10.1093/jee/toy221
Received: 16 April 2018; Accepted: 4 July 2018; Published: 25 July 2018
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KEYWORDS
artificial diet
mass rearing
quality control parameter
sterile insect technique
Tephritidae
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