Combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms

Abstract Background Landscape composition has the potential to foster regulating ecosystem services such as pollination and biocontrol in temperate regions. However, most landscape studies do not take pesticide use into account even though it is the main control strategy worldwide and has negative i...

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Main Authors: Quentin Struelens, Diego Mina, Olivier Dangles
Format: Article
Language:English
Published: CABI 2021-02-01
Series:CABI Agriculture and Bioscience
Subjects:
Online Access:https://doi.org/10.1186/s43170-021-00027-w
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author Quentin Struelens
Diego Mina
Olivier Dangles
author_facet Quentin Struelens
Diego Mina
Olivier Dangles
author_sort Quentin Struelens
collection DOAJ
description Abstract Background Landscape composition has the potential to foster regulating ecosystem services such as pollination and biocontrol in temperate regions. However, most landscape studies do not take pesticide use into account even though it is the main control strategy worldwide and has negative impacts on beneficial insects. Moreover, few studies have explored these combined effects in smallholder cropping system with diverse landscapes and small cultivated fields. Methods We assessed the effect of semi-natural cover and pesticide use on pollinator and herbivore abundances and functions in 9 fields in the Ecuadorian Andes through participatory experiments with smallholder farmers. We performed a path analysis to quantify the effects of landscape and pesticide use on herbivory, pollination and ultimately yield. Results Pesticide use significantly reduced pollinator abundance but had no significant effect on pest abundance. Similarly, we found non-significant effects of landscape composition on either herbivory and pollination. The study also provides new information on understudied Andean lupine’s pests and pollinators, whose application for small farmers is discussed. Finally, we hypothesize that peculiarities of tropical smallholder cropping systems and landscapes could explain the non-significant landscape effects on insect-based processes, which calls for more research in places outside the well-studied temperate region. Conclusions Landscape composition did not show any significant effect on pest and pollinator while pesticide use decreased the abundance pollinators, but with no significant effect on yield. This study also provides information about Andean lupine reproduction and overcompensation mechanisms that could be of interest for local farmers and researchers of this understudied crop.
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spelling doaj-art-075884d7aeb2437994590612aa881ba22025-02-02T20:02:00ZengCABICABI Agriculture and Bioscience2662-40442021-02-01211910.1186/s43170-021-00027-wCombined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farmsQuentin Struelens0Diego Mina1Olivier Dangles2Muséum National d’Histoire Naturelle, Sorbonne UniversitésFaculty of Exact and Natural Sciences, Pontifical Catholic University of EcuadorInstitut de Recherche pour le Développement, Centre d’Ecologie Fonctionnelle et Evolutive, UMR 5175, CNRS, Université de Montpellier, Université Paul Valéry Montpellier, EPHE, IRDAbstract Background Landscape composition has the potential to foster regulating ecosystem services such as pollination and biocontrol in temperate regions. However, most landscape studies do not take pesticide use into account even though it is the main control strategy worldwide and has negative impacts on beneficial insects. Moreover, few studies have explored these combined effects in smallholder cropping system with diverse landscapes and small cultivated fields. Methods We assessed the effect of semi-natural cover and pesticide use on pollinator and herbivore abundances and functions in 9 fields in the Ecuadorian Andes through participatory experiments with smallholder farmers. We performed a path analysis to quantify the effects of landscape and pesticide use on herbivory, pollination and ultimately yield. Results Pesticide use significantly reduced pollinator abundance but had no significant effect on pest abundance. Similarly, we found non-significant effects of landscape composition on either herbivory and pollination. The study also provides new information on understudied Andean lupine’s pests and pollinators, whose application for small farmers is discussed. Finally, we hypothesize that peculiarities of tropical smallholder cropping systems and landscapes could explain the non-significant landscape effects on insect-based processes, which calls for more research in places outside the well-studied temperate region. Conclusions Landscape composition did not show any significant effect on pest and pollinator while pesticide use decreased the abundance pollinators, but with no significant effect on yield. This study also provides information about Andean lupine reproduction and overcompensation mechanisms that could be of interest for local farmers and researchers of this understudied crop.https://doi.org/10.1186/s43170-021-00027-wAndean lupineBiological controlEcosystem servicesExclusion experimentInsecticide useParticipatory research
spellingShingle Quentin Struelens
Diego Mina
Olivier Dangles
Combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms
CABI Agriculture and Bioscience
Andean lupine
Biological control
Ecosystem services
Exclusion experiment
Insecticide use
Participatory research
title Combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms
title_full Combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms
title_fullStr Combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms
title_full_unstemmed Combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms
title_short Combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms
title_sort combined effects of landscape composition and pesticide use on herbivore and pollinator functions in smallholder farms
topic Andean lupine
Biological control
Ecosystem services
Exclusion experiment
Insecticide use
Participatory research
url https://doi.org/10.1186/s43170-021-00027-w
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AT olivierdangles combinedeffectsoflandscapecompositionandpesticideuseonherbivoreandpollinatorfunctionsinsmallholderfarms