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Insects 2017, 8(2), 49; doi:10.3390/insects8020049

Efficacy of Chemicals for the Potential Management of the Queensland Fruit Fly Bactrocera tryoni (Froggatt) (Diptera: Tephritidae)

1
Graham Centre for Agricultural Innovation (New South Wales Department of Primary Industries and Charles Sturt University), Elizabeth Macarthur Agricultural Institute, Private Bag 4008, Narellan, NSW 2567, Australia
2
New South Wales Department of Primary Industries, Biosecurity and Food Safety, Elizabeth Macarthur Agricultural Institute, Private Bag 4008, Narellan, NSW 2567, Australia
3
New South Wales Department of Primary Industries, Chief Scientist’s Branch, Elizabeth Macarthur Agricultural Institute, Private Bag 4008, Narellan, NSW 2567, Australia
*
Author to whom correspondence should be addressed.
Academic Editors: Michael J. Stout, Jeff Davis, Rodrigo Diaz and Julien M. Beuzelin
Received: 2 February 2017 / Revised: 30 March 2017 / Accepted: 2 May 2017 / Published: 9 May 2017
(This article belongs to the Collection Integrated Pest Management)
View Full-Text   |   Download PDF [276 KB, uploaded 9 May 2017]

Abstract

This study investigated alternative in-field chemical controls against Bactrocera tryoni (Froggatt). Bioassay 1 tested the mortality of adults exposed to fruit and filter paper dipped in insecticide, and the topical application of insecticide to adults/fruit. Bioassay 2 measured the mortality of adults permitted to oviposit on fruit dipped in insecticide and aged 0, 1, 3, or 5 days, plus the production of offspring. Bioassay 3 tested infested fruit sprayed with insecticide. The field bioassay trialed the mortality of adults exposed to one- and five-day insecticide residues on peaches, and subsequent offspring. Abamectin, alpha-cypermethrin, clothianidin, dimethoate (half-label rate), emamectin benzoate, fenthion (half- and full-label rate), and trichlorfon were the most efficacious in bioassay 1, across 18 tested insecticide treatments. Overall, the LT50 value was lowest for fenthion (full-label rate), clothianidin, and alpha-cypermethrin. Fenthion, emamectin benzoate, and abamectin had the greatest effect on adult mortality and offspring production. Infested fruit treated with acetamiprid, fenthion, and thiacloprid produced no/very few offspring. Alpha-cypermethrin demonstrated good field efficacy against adults (one day post treatment: 97.2% mortality, five day post treatment: 98.8% mortality) and subsequent offspring (100% across one and five day post treatments), comparable to that of fenthion (full-label rate) (100% mortality for offspring and adults across both post treatments). Alpha-cypermethrin is a possible alternative to fenthion against B. tryoni; as a pyrethroid, it may not be desirable if adjunct biological control is imperative. Thiacloprid and Acetamiprid may be useful as a post-harvest treatment. View Full-Text
Keywords: pesticide; insecticide; dimethoate; fenthion; alpha-cypermethrin; clothianidin; summerfruit; area wide management; integrated pest management pesticide; insecticide; dimethoate; fenthion; alpha-cypermethrin; clothianidin; summerfruit; area wide management; integrated pest management
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Reynolds, O.L.; Osborne, T.J.; Barchia, I. Efficacy of Chemicals for the Potential Management of the Queensland Fruit Fly Bactrocera tryoni (Froggatt) (Diptera: Tephritidae). Insects 2017, 8, 49.

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