Cascading effects of combining synthetic herbivore‐induced plant volatiles with companion plants to manipulate natural enemies in an agro‐ecosystem

Salamanca, Jordano; Souza, Brígida; Rodriguez‐Saona, Cesar

doi:10.1002/ps.4910

Cited by 26 publications

(23 citation statements)

References 77 publications

(180 reference statements)

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“…They found that natural enemies (parasitoids and predators) were more abundant near plants treated with synthetic HIPVs than near non‐treated plants, which resulted in efficient top‐down regulation of pests and reduced crop damage. Other implementations of this strategy yielded mixed success (Salamanca, Souza, & Rodriguez‐Saona, ; Simpson et al., ), highlighting the importance of optimizing the provision of companion plants and synthetic HIPVs in crop fields. Both companion plants and synthetic HIPVs may affect non‐target species.…”

Section: Introductionmentioning

confidence: 99%

“…Both companion plants and synthetic HIPVs may affect non‐target species. For instance, they may attract other pests as well as non‐target natural enemies and higher trophic levels (Orre, Wratten, Jonsson, & Hale, ; Orre‐Gordon, Wratten, Jonsson, Hale, & Simpson, ; Parolin et al., ; Wäckers, Romeis, & van Rijn, ), which may in turn increase intra‐guild predation between natural enemies (Jonsson, Wratten, Landis, & Gurr, ) and fail to increase crop productivity (Salamanca et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Varying the spatial arrangement of synthetic herbivore‐induced plant volatiles and companion plants to improve conservation biological control

Jaworski

Xiao

et al. 2019

Journal of Applied Ecology

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1. Conservation biological control aims to control pests by promoting wild populations of natural enemies. One challenge is to attract and retain efficient natural enemies in crop fields, which often are a suboptimal environment. Towards this goal, the attract-and-reward strategy relies on combining attractive synthetically produced herbivore-induced plant volatiles (HIPVs) with companion plants (non-crop plants which provide alternative resources to the targeted natural enemies). Although severely overlooked, the spatial arrangement of HIPV dispensers and rewards inside crop fields may strongly influence the foraging behaviour and persistence of natural enemies and thus the success of this pest management strategy.2. We tested the impact of two contrasting spatial arrangements of HIPV dispensers and rewards, alternatively inside and around a block of target apple trees, on the efficacy of the biological control of Aphis citricola populations by the common predatory ladybird Propylea japonica in apple orchards in northern China. We used synthetic methyl salicylate (MeSA) as an attractant and the companion plant Calendula officinalis as a reward. To better understand how the spatial arrangement of MeSA dispensers and companion plants affected the attraction and foraging behaviour of adult ladybirds, we conducted indoor experiments in a flight mill, an olfactometer and a wind-tunnel. 3. Blocks of target trees treated with MeSA dispensers inside and companion plants around provided the most efficient pest control in orchards, compared with the opposite spatial arrangement. 4. The synthetic MeSA dispenser and the companion plant synergistically attracted ladybirds in the olfactometer and enhanced their flight activity in the flight mill. In the wind-tunnel, MeSA served as a spatial cue for ladybirds to find nearby prey, while companion plants were sought in the absence of prey. 5. Synthesis and applications. This study aims to further improve aphid control in apple orchards through a careful spatial arrangement of herbivore-induced plant volatiles dispensers (HIPVs) and rewards (companion plants) in optimized | 1177 Journal of Applied Ecology JAWORSKI et Al. S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section at the end of the article. How to cite this article: Jaworski CC, Xiao D, Xu Q, et al. Varying the spatial arrangement of synthetic herbivoreinduced plant volatiles and companion plants to improve conservation biological control.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Varying the spatial arrangement of synthetic herbivore‐induced plant volatiles and companion plants to improve conservation biological control

Jaworski

Xiao

et al. 2019

Journal of Applied Ecology

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“…Apart from supplying extra-floral nectars and pollen, the reward component can also offer additional benefits such as shelter and supply of alternative hosts and prey to natural enemies. The attract and reward combination significantly increases natural enemy populations in crop fields over the application of either of these components alone (Simpson et al, 2011;Salamanca et al, 2018). The combination of MeSA as attractant and buckwheat Fagopyrum esculentum Möench (Polygonaceae) as reward plant boosted the abundance of Scelonidae wasps on broccoli plants, and that of Eulophidae wasps on sweetcorn plants (Simpson et al, 2011).…”

Section: An Optimised Attract and Reward Techniquementioning

confidence: 99%

“…The combination of MeSA as attractant and buckwheat Fagopyrum esculentum Möench (Polygonaceae) as reward plant boosted the abundance of Scelonidae wasps on broccoli plants, and that of Eulophidae wasps on sweetcorn plants (Simpson et al, 2011). Salamanca et al (2018) reported that the combination of MeSA and coriander plants also led to an increased abundance of the predatory thrips Franklinotrips vespiformis (Crawford) (Thysanoptera: Aeolothripidae), predatory bugs Orius insidiosus (Say) (Hemiptera: Anthocoridae), and hoverflies, Toxomerus sp. (Diptera: Syrphidae), on bean plants, but no increase was found in the abundance of earwigs Doru sp.…”

Section: An Optimised Attract and Reward Techniquementioning

confidence: 99%

Exploring the Kairomone-Based Foraging Behaviour of Natural Enemies to Enhance Biological Control: A Review

et al. 2021

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Kairomones are chemical signals that mediate interspecific interactions beneficial to organisms that detect the cues. These attractants can be individual compounds or mixtures of herbivore-induced plant volatiles (HIPVs) or herbivore chemicals such as pheromones, i.e., chemicals mediating intraspecific communication between herbivores. Natural enemies eavesdrop on kairomones during their foraging behaviour, i.e., location of oviposition sites and feeding resources in nature. Kairomone mixtures are likely to elicit stronger olfactory responses in natural enemies than single kairomones. Kairomone-based lures are used to enhance biological control strategies via the attraction and retention of natural enemies to reduce insect pest populations and crop damage in an environmentally friendly way. In this review, we focus on ways to improve the efficiency of kairomone use in crop fields. First, we highlight kairomone sources in tri-trophic systems and discuss how these attractants are used by natural enemies searching for hosts or prey. Then we summarise examples of field application of kairomones (pheromones vs. HIPVs) in recruiting natural enemies. We highlight the need for future field studies to focus on the application of kairomone blends rather than single kairomones which currently dominate the literature on field attractants for natural enemies. We further discuss ways for improving kairomone use through attract and reward technique, olfactory associative learning, and optimisation of kairomone lure formulations. Finally, we discuss why the effectiveness of kairomone use for enhancing biological control strategies should move from demonstration of increase in the number of attracted natural enemies, to reducing pest populations and crop damage below economic threshold levels and increasing crop yield.

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“…These compounds can also accumulate on plant surfaces and through their smell provide repellency and protection against attacking insects (Ibrahim et al 2001(Ibrahim et al , 2005Yarou et al 2017). Extracts and essential oils can be sprayed on plants or released from various dispensers (Ibrahim et al 2005;Mofikoya et al 2017;Salamanca et al 2018). Plant extracts may affect orientation behaviour or host acceptance by the herbivorous insects, but also attract some parasitoids of the pest insect (Ibrahim et al 2005;Egigu et al 2010).…”

Section: Do Svocs Deposited On Leaf Surfaces Affect Herbivorous Insects?mentioning

confidence: 99%

Foliar behaviour of biogenic semi-volatiles: potential applications in sustainable pest management

Mofikoya

Bui

Kivimäenpää

et al. 2019

Arthropod-Plant Interactions

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Plants emit an extremely diverse bouquet of volatile organic compounds (VOCs) from their above-ground and below-ground parts. Emissions are constitutive or induced, e.g. by herbivores. VOCs can be classified as highly volatile, volatile and semivolatile compounds. Sesquiterpenes (SQTs) are typical semi-volatile organic compounds (sVOCs) released by plants. Similarly, herbivore-induced homoterpenes and methyl salicylate also have relatively low volatility. SVOCs have a high boiling point (> 240 °C) and a vapour pressure below 0.005 kPa at 25 °C. Glandular trichomes on plant surfaces can store SQTs in mixtures with more volatile VOCs, which are released into the air by diffusion or after gland rupture. The sVOCs stored in glandular trichomes often have repellent effects on herbivores, while herbivore-induced sVOCs are known for their attractiveness to natural enemies of herbivores, i.e. they act in indirect chemical defence of plants. Due to their low volatility, sVOCs produced by plants may easily adhere to the surfaces of emitter and neighbouring plants during the colder temperatures that plants face, e.g. at night. On the foliage of neighbouring receiver plants, sVOCs may act in direct and indirect defence of that plant species. When the temperature rises again, sVOCs are released into the atmosphere. The semi-volatile reaction products of highly volatile plant monoterpenes and photochemical pollutants such as ozone could constitute further sVOCs on plant leaf surfaces. Here, we review recent literature of the plant surface-environment interaction of biogenic sVOCs and particularly evaluate potential crop protection strategies such as intercropping and companion planting using sVOC-emitting species. Foliage typically forms the widest surfaces on crop plants, and foliar herbivory is a major type of pest damage during the vegetative stage of crop plants. Foliage is also a major source of herbivore-induced VOC emissions. Consequently, we focus on foliage-mediated sVOCs and their potential in pest management.

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Cascading effects of combining synthetic herbivore‐induced plant volatiles with companion plants to manipulate natural enemies in an agro‐ecosystem

Abstract: MeSA alone or combined with coriander attracted different predator communities, altered pest communities, and reduced damage; however, these results did not cascade down to improve crop productivity. © 2018 Society of Chemical Industry.

Cited by 26 publications

References 77 publications

Varying the spatial arrangement of synthetic herbivore‐induced plant volatiles and companion plants to improve conservation biological control

Varying the spatial arrangement of synthetic herbivore‐induced plant volatiles and companion plants to improve conservation biological control

Exploring the Kairomone-Based Foraging Behaviour of Natural Enemies to Enhance Biological Control: A Review

Foliar behaviour of biogenic semi-volatiles: potential applications in sustainable pest management

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