The University of Southampton
University of Southampton Institutional Repository

Implications of sub-lethal rates of insecticides and daily time of application on Drosophila suzukii lifecycle

Implications of sub-lethal rates of insecticides and daily time of application on Drosophila suzukii lifecycle
Implications of sub-lethal rates of insecticides and daily time of application on Drosophila suzukii lifecycle
The circadian clock is responsible for time keeping within an organism and influences not only behavioural patterns, but also physiological rhythms including toxin susceptibility. Drosophila suzukii Matsumura is a global horticultural pest, and identifying rhythms in insecticide susceptibility could contribute to improving integrated pest management practices. To determine whether time of application influences mortality, LC50 rates of cyantraniliprole, lambda-cyhalothrin, pyrethrum and spinosad were applied to groups of adult D. suzukii at two different times of day. Insecticides were directly applied using a benchtop sprayer. We found no influence of time on mortality or oviposition for any of the four insecticides applied. However, several discoveries were made regarding the impact of sub-lethal and lethal rates on D. suzukii mortality, oviposition and offspring survival over time. In most cases, all surviving females recovered from insecticide rates, and laid the same number of eggs as females treated with the water control. Seven days after application, females that were treated with the field rate of spinosad laid the same number of eggs as the control. The lowest rate of cyantraniliprole resulted in more eggs being laid, initially, with no negative impact on survival of eggs through to adult emergence. However, there were transgenerational impacts of egg to adult survival when parents were treated with sub-lethal rates of spinosad and lambda-cyhalothrin. Although no impact of daily phase of application was detected within this assay, the information surrounding how D. suzukii interacts with lethal and sub-lethal rates of insecticides is of great importance, especially for the resistance management of D. suzukii.
0261-2194
182-194
Shaw, Bethan
c214ccfc-a6fa-4e11-9a98-d6e57dfc4ed3
Brain, Philip
4ade5b55-fc32-4944-8846-bfd12f79f2ae
Wijnen, Herman
67e9bc5d-de6e-44ec-b4c2-50b67c5bc79d
Fountain, Michelle
a438f506-a978-41a4-9aa8-d69bd7f98080
Shaw, Bethan
c214ccfc-a6fa-4e11-9a98-d6e57dfc4ed3
Brain, Philip
4ade5b55-fc32-4944-8846-bfd12f79f2ae
Wijnen, Herman
67e9bc5d-de6e-44ec-b4c2-50b67c5bc79d
Fountain, Michelle
a438f506-a978-41a4-9aa8-d69bd7f98080

Shaw, Bethan, Brain, Philip, Wijnen, Herman and Fountain, Michelle (2019) Implications of sub-lethal rates of insecticides and daily time of application on Drosophila suzukii lifecycle. Crop Protection, 121, 182-194. (doi:10.1016/j.cropro.2019.04.006).

Record type: Article

Abstract

The circadian clock is responsible for time keeping within an organism and influences not only behavioural patterns, but also physiological rhythms including toxin susceptibility. Drosophila suzukii Matsumura is a global horticultural pest, and identifying rhythms in insecticide susceptibility could contribute to improving integrated pest management practices. To determine whether time of application influences mortality, LC50 rates of cyantraniliprole, lambda-cyhalothrin, pyrethrum and spinosad were applied to groups of adult D. suzukii at two different times of day. Insecticides were directly applied using a benchtop sprayer. We found no influence of time on mortality or oviposition for any of the four insecticides applied. However, several discoveries were made regarding the impact of sub-lethal and lethal rates on D. suzukii mortality, oviposition and offspring survival over time. In most cases, all surviving females recovered from insecticide rates, and laid the same number of eggs as females treated with the water control. Seven days after application, females that were treated with the field rate of spinosad laid the same number of eggs as the control. The lowest rate of cyantraniliprole resulted in more eggs being laid, initially, with no negative impact on survival of eggs through to adult emergence. However, there were transgenerational impacts of egg to adult survival when parents were treated with sub-lethal rates of spinosad and lambda-cyhalothrin. Although no impact of daily phase of application was detected within this assay, the information surrounding how D. suzukii interacts with lethal and sub-lethal rates of insecticides is of great importance, especially for the resistance management of D. suzukii.

Text
Shaw CROP PROTECTION 2019 accepted - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 9 April 2019
e-pub ahead of print date: 10 April 2019
Published date: July 2019

Identifiers

Local EPrints ID: 430468
URI: http://eprints.soton.ac.uk/id/eprint/430468
ISSN: 0261-2194
PURE UUID: e8eddee6-693b-481e-8a8e-72749bcd4c66
ORCID for Herman Wijnen: ORCID iD orcid.org/0000-0002-8710-5176

Catalogue record

Date deposited: 01 May 2019 16:30
Last modified: 07 Oct 2020 05:08

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×