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Improved larval diets for mass rearing of Queensland fruit fly (Bactrocera tryoni)

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posted on 29.03.2022, 01:18 authored by Tahereh Moadeli
"The Queensland fruit fly or ‘Q-fly’, Bactrocera tryoni (Diptera: Tephritidae), is Australia’s most economically important insect pest of fruit crops. The Sterile Insect Technique (SIT), which involves the mass rearing and release of millions of sterile flies to curtail reproduction of wild populations, is used as an environmentally benign approach to control Q-fly. High quality larval diets are essential for economical mass rearing and effective SIT. As a first step to development of improved diets, liquid larval diet formulations that have received substantial interest over the past decade (‘Chang 2006’ and ‘Chang 2009’) were compared with a conventional carrot-based solid diet. Results suggested that liquid diets are a promising alternative to carrot diet, but that their performance can be constrained by heterogeneity and high viscosity that can result in high larval mortality. To deal with these issues, the liquid diet formulations were mixed with agar (0, 0.25, 0.5, 1.0 and 1.5%) to produce gel diets. Significant diet by agar group interactions were found for most quality parameters, indicating that development of agar-based diets is a far more complex task that adding a specified proportion of agar to a suitable liquid diet formulation; the ideal proportion of agar to use depends on the diet formulation. Overall, around 1% agar provided the best balance of development rate, productivity and quality parameters. Diet experiments used eggs transported in water, and supplementary experiments confirm that the typical transit time of ca. 2 hours does not reduce hatching rate. These projects set the stage for more detailed investigation of gel diets as the most promising option for mass-rearing of Q-fly for SIT." -- Abstract.

History

Table of Contents

Chapter One. Comparison between conventional larval diet for Queensland fruit fly Bactrocera tryoni (Froggatt)(Diptera: Tephritidae) and two liquid diets -- Chapter Two. High productivity gel diets for mass rearing of Queensland fruit fly Bactrocera tryoni (Froggatt)(Diptera: Tephritidae) -- Chapter Three. Detrimental effect of immersion in water on egg hatching of Bactrocera tryoni, is ameliorated by aeration -- Appendices.

Notes

"[A thesis submitted in fulfilment of the requirements for the degree of Master of Research, Department of Biological Sciences, Faculty of Science, Macquarie University]". "Date of submission: October 2015". "This thesis is written in the form of journal articles from: Entomologia experimentalis et applicata, Journal of applied entomology" -- verso t.p.

Awarding Institution

Macquarie University

Degree Type

Thesis MRes

Degree

MRes, Macquarie University, Department of Biological Sciences

Department, Centre or School

Department of Biological Sciences

Year of Award

2015

Principal Supervisor

Phillip Taylor

Rights

Copyright Tahereh Moadeli 2015. Copyright disclaimer: http://www.copyright.mq.edu.au/

Language

English

Jurisdiction

Queensland

Extent

1 online resource (vii, 50 pages) illustrations (some coloured)

Former Identifiers

mq:43237 http://hdl.handle.net/1959.14/1059339