Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico

The use of exotic species for pest biocontrol has been a common pathway for introduction and dispersal of invasive species that may have undesired outcomes. Biocontrol agents are believed to be a less damaging alternative than pesticides, but some species may also prey on or parasitize native specie...

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Autores principales:	Morelia Camacho-Cervantes, Wendy Mendoza-Arroyo, Daniela Arellano-Sánchez, Ek del-Val
Formato:	article
Lenguaje:	EN
Publicado:	PeerJ Inc. 2021
Materias:	Biocontrol Invasive species Pest control Aphid Cycloneda sanguinea Hippodamia convergens Medicine R
Acceso en línea:	https://doaj.org/article/3374e3614ad54d369fdfe7ebd513e08f
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spelling	oai:doaj.org-article:3374e3614ad54d369fdfe7ebd513e08f2021-11-18T15:05:42ZExotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico10.7717/peerj.125032167-8359https://doaj.org/article/3374e3614ad54d369fdfe7ebd513e08f2021-11-01T00:00:00Zhttps://peerj.com/articles/12503.pdfhttps://peerj.com/articles/12503/https://doaj.org/toc/2167-8359The use of exotic species for pest biocontrol has been a common pathway for introduction and dispersal of invasive species that may have undesired outcomes. Biocontrol agents are believed to be a less damaging alternative than pesticides, but some species may also prey on or parasitize native species or outcompete them for resources. The harlequin ladybird (Harmonia axyridis) is a well-known biocontrol agent originally from Asia that has established invasive populations in 59 countries around the globe. Harlequin ladybirds are generalist predators that in addition to pests prey on an array of different species including other coccinelids’ eggs and larvae. In Mexico, native ladybirds that share ecological requirements with harlequin ladybirds are at risk of being outcompeted and predated upon. The aim of our study was to compare the foraging efficiency of harlequin ladybirds against three species of native coccinelids when preying on aphids. We investigated the foraging behaviour of ladybirds alone and in pairs with a conspecific, a native heterospecific or an exotic heterospecific. We found that the native Cycloneda sanguinea was the species that consumed the most aphids, while Hippodamia convergens was the fastest to find and consume each aphid. Harlequin ladybirds and H. convergens consumed the same number of aphids while P. vittigera consumed less. Conspecific competition was stronger than heterospecific competition. We discuss the suitability of using the exotic invasive harlequin ladybird for aphid biocontrol in comparison with native coccinelids.Morelia Camacho-CervantesWendy Mendoza-ArroyoDaniela Arellano-SánchezEk del-ValPeerJ Inc.articleBiocontrolInvasive speciesPest controlAphidCycloneda sanguineaHippodamia convergensMedicineRENPeerJ, Vol 9, p e12503 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biocontrol Invasive species Pest control Aphid Cycloneda sanguinea Hippodamia convergens Medicine R
spellingShingle	Biocontrol Invasive species Pest control Aphid Cycloneda sanguinea Hippodamia convergens Medicine R Morelia Camacho-Cervantes Wendy Mendoza-Arroyo Daniela Arellano-Sánchez Ek del-Val Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico
description	The use of exotic species for pest biocontrol has been a common pathway for introduction and dispersal of invasive species that may have undesired outcomes. Biocontrol agents are believed to be a less damaging alternative than pesticides, but some species may also prey on or parasitize native species or outcompete them for resources. The harlequin ladybird (Harmonia axyridis) is a well-known biocontrol agent originally from Asia that has established invasive populations in 59 countries around the globe. Harlequin ladybirds are generalist predators that in addition to pests prey on an array of different species including other coccinelids’ eggs and larvae. In Mexico, native ladybirds that share ecological requirements with harlequin ladybirds are at risk of being outcompeted and predated upon. The aim of our study was to compare the foraging efficiency of harlequin ladybirds against three species of native coccinelids when preying on aphids. We investigated the foraging behaviour of ladybirds alone and in pairs with a conspecific, a native heterospecific or an exotic heterospecific. We found that the native Cycloneda sanguinea was the species that consumed the most aphids, while Hippodamia convergens was the fastest to find and consume each aphid. Harlequin ladybirds and H. convergens consumed the same number of aphids while P. vittigera consumed less. Conspecific competition was stronger than heterospecific competition. We discuss the suitability of using the exotic invasive harlequin ladybird for aphid biocontrol in comparison with native coccinelids.
format	article
author	Morelia Camacho-Cervantes Wendy Mendoza-Arroyo Daniela Arellano-Sánchez Ek del-Val
author_facet	Morelia Camacho-Cervantes Wendy Mendoza-Arroyo Daniela Arellano-Sánchez Ek del-Val
author_sort	Morelia Camacho-Cervantes
title	Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico
title_short	Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico
title_full	Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico
title_fullStr	Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico
title_full_unstemmed	Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico
title_sort	exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in mexico
publisher	PeerJ Inc.
publishDate	2021
url	https://doaj.org/article/3374e3614ad54d369fdfe7ebd513e08f
work_keys_str_mv	AT moreliacamachocervantes exoticpredatorsarenotbetterbiocontrolagentstheharlequinladybirdisnotthemostvoraciousinmexico AT wendymendozaarroyo exoticpredatorsarenotbetterbiocontrolagentstheharlequinladybirdisnotthemostvoraciousinmexico AT danielaarellanosanchez exoticpredatorsarenotbetterbiocontrolagentstheharlequinladybirdisnotthemostvoraciousinmexico AT ekdelval exoticpredatorsarenotbetterbiocontrolagentstheharlequinladybirdisnotthemostvoraciousinmexico
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Exotic predators are not better biocontrol agents: the harlequin ladybird is not the most voracious in Mexico

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