Landscape-scale expansion of agroecology to enhance natural pest control: A systematic review

Petit, Sandrine; Muneret, Lucile; Carbonne, Benjamin; Hannachi, Mourad; Ricci, Benoît; Rusch, Adrien; Lavigne, Claire

doi:10.1016/bs.aecr.2020.09.001

Cited by 48 publications

(39 citation statements)

References 133 publications

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“…We used a spatial extent of 1 km radius, in line with many studies on biological pest control studies, and because it explains the responses of predators and pests in vineyards landscapes (Muneret et al, 2019a;Petit et al, 2020). At each site, a treatment with high cover crop diversity (flower strips) and a control with low cover crop diversity (grassy strips) were applied each in one separate field within the same farm and soil type.…”

Section: Methodsmentioning

confidence: 99%

“…We selected semi‐natural habitats as a measure of landscape complexity as this is highly correlated to other measures of landscape heterogeneity and because landscapes of our region are mainly composed of vineyards, forests and grasslands (Muneret et al., 2018; Roschewitz et al., 2005). We used a spatial extent of 1 km radius, in line with many studies on biological pest control studies, and because it explains the responses of predators and pests in vineyards landscapes (Muneret et al., 2019a; Petit et al., 2020). At each site, a treatment with high cover crop diversity (flower strips) and a control with low cover crop diversity (grassy strips) were applied each in one separate field within the same farm and soil type.…”

Section: Methodsmentioning

confidence: 99%

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Benefits of increased cover crop diversity for predators and biological pest control depend on the landscape context

Beaumelle

Auriol

Grasset

et al. 2021

Ecol Sol and Evidence

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1. Increasing plant diversity in agricultural systems is a promising way to balance food production and biodiversity conservation. Biological pest control, a crucial ecosystem service delivered by natural enemies, could particularly benefit from increased plant diversity at the local scale. Such positive effects however often depend on the landscape context that shapes the pool of natural enemy species available and their ability to colonize newly created habitats. However, how the landscape context modulates the local effect of plant diversity on natural enemies and pest control services remains unclear.2. Here, we manipulated the diversity of cover crops (2 versus 20 plant species) in nine pairs of vineyards located along a landscape gradient ranging from 20 to 60% of semi-natural habitats. We sampled natural enemy communities in the soil and foliage and measured the predation rate of an important moth pest in European vineyards (Lobesia botrana).3. Diverse cover crops enhanced the abundance of natural enemies by 140% across the experiment, but without changing their taxonomic richness and composition.We further found a distance-decay effect of cover crops on natural enemy abundance across cover crop types. 4. The landscape context remarkably modulated the effects of local plant diversity on natural enemy abundance and predation rates. While predation rates were on average similar in the low and high cover crop diversity treatments across the experiment, diverse cover crops had higher positive effects on predation and natural enemies in simple (<50% semi-natural habitats) than complex landscapes. Predation rates increased from 11 to 42% in the high compared with low cover crop diversity treatments in simple landscapes. Synthesis and applications:Our study demonstrates the benefits of increasing plant diversity at the local scale to enhance the abundance of natural enemies as well as the level of biological pest control services in vineyard agroecosystems. Diverse cover crops mostly benefit natural enemies and biological pest control in simplifiedThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Benefits of increased cover crop diversity for predators and biological pest control depend on the landscape context

Beaumelle

Auriol

Grasset

et al. 2021

Ecol Sol and Evidence

Self Cite

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“…This probably reflects the diversity of carabid responses to soil cultivation (Shearin et al, 2007; Ward et al, 2011) and likely the huge diversity of strategies encapsulated within the carabid community. It is possible that to enhance carabids through tillage strategies, reasoning at both the landscape or crop rotation scales could be relevant (Petit et al, 2020). A high diversity of tillage strategies at a landscape scale could thus enhance the occurrence of multiple abundant species.…”

Section: Discussionmentioning

confidence: 99%

Converting cropping systems into seasonal habitat functionality reveals the hump-shaped responses of carabid beetles to agricultural management

Muneret

Ricci

Vialatte

et al. 2022

Preprint

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Understanding effects on the huge diversity of cropping systems on local biodiversity is challenging but necessary to implement agroecological systems. Through a functional approach, the translation of cropping systems into resource and disturbance gradients is promising to decipher the relationship between cropping systems and biodiversity but has never been implemented for arthropods. To investigate contributions of resource and disturbance gradients arising from cropping systems vs environmental context (regional effect, meteorological conditions and landscape characteristics) on beneficial arthropod communities, we used a dataset collected in 60 crop fields from three French areas over a five-years period. It includes all farmers interventions, crop sequences, meteorological data, landscape composition and carabid samplings. We found that the environmental context contributed to about 75% of explained carabid variations on average, while resource and disturbance gradients contributed to about 25% of explained carabid variations. The resource and disturbance gradients were particularly important in winter and spring preceding the spring-summer period to determine carabid variations. Moreover, we identified thresholds above which resource and disturbance gradients start being beneficial or detrimental for carabids. For example, a Treatment Frequency Index above 2.07 in spring decreased the total activity density of carabids during the spring-summer period. Synthesis and application. While implementing for the first time a functional approach to understand the effects of different facets of cropping systems on arthropods, our study also allows us to identify periods and thresholds above which specific practices affect carabids. The identification of such thresholds can guide the provision of recommendations for policy, stakeholders and farmers about how to reduce cropping systems' impact on arthropods.

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“…As for plant and animal communities in general (see Chapter 2), a number of studies have thus focused on the impact of landscape heterogeneity on the abundance of pests and their suppression by natural enemies with the aim to promote conservation biological control (Begg et al 2017 ). More recently, some studies have explored the potential of the spatial expansion of agroecology at a landscape scale to enhance pest control (Petit et al 2020 ). Such studies typically investigate how natural enemy abundance or diversity, predation and parasitism, or pest abundance in fields depend on the surrounding landscape (e.g.…”

Section: The Contribution Of the Regulating Ecosystem Services Pest Control And Pollination To Agroecological Landscapesmentioning

confidence: 99%

Agroecology landscapes

et al. 2021

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Context Agroecology combines agronomic and ecological concepts. It relies on the enhancement of biodiversity and related ecosystem services to support agricultural production. It is dependent on biological interactions for the design and management of agricultural systems in agricultural landscapes. Objectives We review the role of landscape ecology to understand and promote biodiversity, pest regulation and crop pollination for the designing of “agroecology landscapes”. We illustrate the use of landscape ecological methods for supporting agroforestry systems as an example of agroecological development, and we propose pathways to implement agroecology at landscape scale. Methods The state of the art of how landscape ecology contributes to agroecology development is summarized based on a literature review. Results Agroecology requires thinking beyond the field scale to consider the positioning, quality and connectivity of fields and semi-natural habitats at larger spatial scales. The spatial and temporal organisation of semi-natural elements and the crop mosaic interact. Understanding this interaction is the pre-requisite for promoting patterns and mechanisms that foster biodiversity and ecosystem service provision. Promoting agroecological practices beyond individual farm borders can be rooted in a bottom-up approach from agroecological lighthouse farms to farm networks to amplify agroecology adoption at the landscape scale. Conclusions Achieving agricultural landscapes composed of fields and farms following agroecological management requires understanding of biodiversity patterns, biological interactions and mechanisms that determine and boost ecosystem functioning to improve services at landscape scale, involving farmers in a bottom-up and context-specific approach.

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Landscape-scale expansion of agroecology to enhance natural pest control: A systematic review

Cited by 48 publications

References 133 publications

Benefits of increased cover crop diversity for predators and biological pest control depend on the landscape context

Benefits of increased cover crop diversity for predators and biological pest control depend on the landscape context

Converting cropping systems into seasonal habitat functionality reveals the hump-shaped responses of carabid beetles to agricultural management

Agroecology landscapes

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