Do flower mixtures with high functional diversity enhance aphid predators in wildflower strips?

Hatt, Séverin; Uyttenbroeck, Roel; Lopes, Thomas Chevalier Mendes; Mouchon, Pierre; Chen, Julian; Piqueray, Julien; Monty, Arnaud; Francis, Frédéric

doi:10.14411/eje.2017.010

Cited by 32 publications

(29 citation statements)

References 84 publications

(86 reference statements)

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“…together, whereas parasitoids did not visit long corolla flowers and bumble bees were absent from short corolla flowers. Nevertheless, several recent studies did not report an increased diversity of flower-visiting insects with such a mixture, recalling that a high functional diversity at the mixture level does not necessarily enhance insect diversity (Balzan et al, 2014(Balzan et al, , 2016aHatt et al, 2017c;Uyttenbroeck et al, 2017). At the landscape scale, however, the increased density of flowering features such as hedgerows showed a positive effect on pest control by parasitoids and pollination (Dainese et al, 2017).…”

Section: Pollinationmentioning

confidence: 99%

“…Recent field-based experiments highlighted the ability of these tailored flower mixtures to enhance insect pest control and reduce crop damage in the adjacent crops, as compared with the generic flower mixture often proposed in the framework of agrienvironmental policies for biodiversity conservation purpose (targeted pests were aphids on potato and pollen availability, flowering time and duration, flower volatiles) (Campbell et al, 2010;Fiedler and Landis, 2007a;Hatt et al, 2017b;Wäckers, 2004). Nevertheless, recent findings did not confirm this hypothesis (Balzan et al, 2016a;Hatt et al, 2017c). A reason is that some attractive species present in the mixtures may have overwhelmed the effect of functional diversity.…”

Section: Composition Of Non-crop Habitatsmentioning

confidence: 99%

See 1 more Smart Citation

Spatial diversification of agroecosystems to enhance biological control and other regulating services: An agroecological perspective

Hatt

Boeraeve

Artru

et al. 2018

Science of The Total Environment

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Spatial diversification of crop and non-crop habitats in farming systems is promising for enhancing natural regulation of insect pests. Nevertheless, results from recent syntheses show variable effects.One explanation is that the abundance and diversity of pests and natural enemies are affected by the composition, design and management of crop and non-crop habitats. Moreover, interactions between both local and landscape elements and practices carried out at different spatial scales may affect the regulation of insect pests. Hence, research is being conducted to understand these interdependencies.However, insects are not the only pests and pests are not the only elements to regulate in agroecosystems. Broadening the scope could allow addressing multiple issues simultaneously, but also solving them together by enhancing synergies. Indeed, spatial diversification of crop and non-crop habitats can allow addressing the issues of weeds and pathogens, along with being beneficial to several other regulating services like pollination, soil conservation and nutrient cycling. Although calls rise to develop multifunctional landscapes that optimize the delivery of multiple ecosystem services, it still represents a scientific challenge today. Enhancing interdisciplinarity in research institutions and building interrelations between scientists and stakeholders may help reach this goal. Despite obstacles, positive results from research based on such innovative approaches are encouraging for engaging 2 science in this path. Hence, the aim of the present paper is to offer an update on these issues by exploring the most recent findings and discussing these results to highlight needs for future research.

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Section: Pollinationmentioning

confidence: 99%

Section: Composition Of Non-crop Habitatsmentioning

confidence: 99%

Spatial diversification of agroecosystems to enhance biological control and other regulating services: An agroecological perspective

Hatt

Boeraeve

Artru

et al. 2018

Science of The Total Environment

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“…1). (Table 1; for more details regarding the sowing protocol and the composition of each mixture at sowing, see Uyttenbroeck et al 2015Uyttenbroeck et al , 2017Hatt et al 2017c). The layout resulted in a Latin square design with 25 plots and in the present study, three out of the five WFS (in total 15 plots) were used ( Fig.…”

Section: Field Setupmentioning

confidence: 99%

Identification of flower functional traits affecting abundance of generalist predators in perennial multiple species wildflower strips

Hatt

Uytenbroeck

Lopes

et al. 2018

Arthropod-Plant Interactions

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In agricultural fields, wildflower strips can be sown to enhance conservation biological control of insect pests. However, issues remain regarding the composition of flower mixtures to effectively attract and support large communities of natural enemies. Trait-based approaches are promising for this purpose. In the present study, conducted in an agricultural field of Belgium in 2014 and 2015, 15 flower mixtures were considered to explore the relation between the abundance of trapped generalist predators (i.e., lacewings [Neuroptera: Chrysopidae], ladybeetles [Coleoptera: Coccinellidae] and hoverflies [Diptera: Syrphidae]) and the community-weighted means of seven flower traits. Through a redundancy analysis, it was found that the presence/absence of flower ultraviolet pattern and the morphology of the corolla (that determines the accessibility of floral resources) were the traits that significantly affected the abundance of the generalist predators in the flower mixtures. The ladybeetles Harmonia axyridis and Propylea quatuordecimpunctata as well as the lacewings Chrysoperla carnae were more abundant in mixtures with a high cover of flowers showing an ultraviolet pattern, while the opposite was observed for the ladybeetle Coccinella septempunctata. As for hoverflies, Episyrphus balteatus and Eupeodes corollae were more abundant in mixtures with a high cover of flowers with open nectar. These results bring new knowledge regarding how a range of natural enemy species reacts to flower cues in diversified plant communities and should help in elaborating flower mixtures that enhance conservation biological control.

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“…Additionally, some insect species abundance can be influenced by flower functional traits (e.g., corolla morphology, flower color, bloom time; Hatt et al. , ). Despite these findings, others have found that increasing plant functional diversity can actually reduce resources for pollinators and, thus, cannot increase pollinator richness (Uyttenbroeck et al.…”

Section: Introductionmentioning

confidence: 99%

“…However, other studies have shown that certain wildflower species (e.g., key plants) can attract the majority of bees and other flower visitors (Warzecha et al 2018). Additionally, some insect species abundance can be influenced by flower functional traits (e.g., corolla morphology, flower color, bloom time; Hatt et al 2017aHatt et al , 2019. Despite these findings, others have found that increasing plant functional diversity can actually reduce resources for pollinators and, thus, cannot increase pollinator richness (Uyttenbroeck et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Wildflower plantings harbor increased arthropod richness and abundance within agricultural areas in Florida (USA)

et al. 2019

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Intensive agriculture has led to a reduction of overall biodiversity and ecosystem services such as pollination and biological control. To offset these economic losses, many farmers are planting native wildflowers to enhance flowering plant diversity and augment pollinator and other beneficial arthropod populations on their farms. In this study, we examined arthropod communities in Florida (USA) within wildflower plots and fallow control plots, which were primarily composed of grasses. Significantly more herbivorous insects, predatory arthropods, and pollinators were found within wildflower plots than in fallow control plots. We also implemented pollinator surveys at flowering plants. These surveys highlighted numerous plant–pollinator interactions within wildflower plots, supporting the idea that some native wildflower species are more attractive to pollinators than are others. Nevertheless, utilizing diverse flowering plants for wildflower plots may support a wide diversity of beneficial arthropod species, including native bees. Our results suggest that wildflower plantings in Florida can be a successful management tool to harbor increased overall plant and arthropod diversity (including native pollinators and other beneficial arthropods) within intensive agricultural areas.

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Do flower mixtures with high functional diversity enhance aphid predators in wildflower strips?

Cited by 32 publications

References 84 publications

Spatial diversification of agroecosystems to enhance biological control and other regulating services: An agroecological perspective

Spatial diversification of agroecosystems to enhance biological control and other regulating services: An agroecological perspective

Identification of flower functional traits affecting abundance of generalist predators in perennial multiple species wildflower strips

Wildflower plantings harbor increased arthropod richness and abundance within agricultural areas in Florida (USA)

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