Intraguild Predation Usually does not Disrupt Biological Control

Janssen, Arne; Montserrat, Marta; HilleRisLambers, Reinier; Roos, André M. de; Pallini, Ângelo; Sabelis, Maurice W.

doi:10.1007/1-4020-4767-3_2

Cited by 102 publications

(117 citation statements)

References 65 publications

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“…However, effects of intraguild predation should not be overestimated, because most studies do not show any negative effect on biological control (Janssen et al 2006). For example, mirid predatory bugs also feed on parasitized whiteflies, but the combination of predators and parasitoids can still be better for biological control Gabarra et al 2006).…”

Section: Food Web Complexitiesmentioning

confidence: 99%

Approaches to conserving natural enemy populations in greenhouse crops: current methods and future prospects

Messelink¹,

Bennison

Alomar³

et al. 2014

BioControl

229

131

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Biological pest control in greenhouse crops is usually based on periodical releases of mass-produced natural enemies, and this method has been successfully applied for decades. However, in some cases there are shortcomings in pest control efficacy, which often can be attributed to the poor establishment of natural enemies. Their establishment and population numbers can be enhanced by providing additional resources, such as alternative food, prey, hosts, oviposition sites or shelters. Furthermore, natural enemy efficacy can be enhanced by using volatiles, adapting the greenhouse climate, avoiding pesticide side-effects and minimizing disrupting food web complexities. The special case of high value crops in a protected greenhouse environment offers tremendous opportunities to design and manage the system in ways that increase crop resilience to pest infestations. While we have outlined opportunities and tools to develop such systems, this review also identifies knowledge gaps, where additional research is needed to optimize these tools.

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Section: Food Web Complexitiesmentioning

confidence: 99%

Approaches to conserving natural enemy populations in greenhouse crops: current methods and future prospects

Messelink¹,

Bennison

Alomar³

et al. 2014

BioControl

229

131

View full text Add to dashboard Cite

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“…Empirical studies show that increasing diversity of natural enemies can result in a full spectrum of outcomes, including additive, antagonistic, synergistic, or no effects on biological control (Casula et al 2006;Janssen et al 2006Janssen et al , 2007. Less attention has been paid to the impact of pest species diversity on biological control.…”

Section: Introductionmentioning

confidence: 99%

Pest species diversity enhances control of spider mites and whiteflies by a generalist phytoseiid predator

Messelink¹,

Maanen

Holstein-Saj³

et al. 2009

BioControl

Self Cite

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To test the hypothesis that pest species diversity enhances biological pest control with generalist predators, we studied the dynamics of three major pest species on greenhouse cucumber: Western flower thrips, Frankliniella occidentalis (Pergande), greenhouse whitefly, Trialeurodes vaporariorum (Westwood), and two-spotted spider mites, Tetranychus urticae Koch in combination with the predator species Amblyseius swirskii Athias-Henriot. When spider mites infested plants prior to predator release, predatory mites were not capable of controlling spider mite populations in the absence of other pest species. A laboratory experiment showed that predators were hindered by the webbing of spider mites. In a greenhouse experiment, spider mite leaf damage was lower in the presence of thrips and predators than in the presence of whiteflies and predators, but damage was lowest in the presence of thrips, whiteflies and predators. Whitefly control was also improved in the presence of thrips. The lower levels of spider mite leaf damage probably resulted from (1) a strong numerical response of the predator (up to 50 times higher densities) when a second and third pest species were present in addition to spider mites, and (2) from A. swirskii attacking mobile spider mite stages outside or near the edges of the spider mite webbing. Interactions of spider mites with thrips and whiteflies might also result in suppression of spider mites. However, when predators were released prior to spider mite infestations in the absence of other pest species, but with pollen as food for the predators, we found increased suppression of spider mites with increased numbers of predators released, confirming the role of predators in spider mite control. Thus, our study provides evidence that diversity of pest species can enhance biological control through increased predator densities.

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“…High prey availability may prevent predator-predator competition from occurring, as seemed to be the case with a non-native coccinellid beetle, which suppressed a native coccinellid at low prey densities but not at high prey densities (Obrycki et al 1998). The setting of this study may also have precluded species interactions; long-term dynamics may not be possible in agricultural systems, due to disturbance from insecticide applications and other farming practices (Janssen et al 2006). The roles of short-and longterm dynamics in the relatively recent arrival of C. mildei are also difficult to determine, as C. mildei has either been present in these sites for less than 10 years, or has not become established over the long-term, and has repeatedly recolonized vineyards after dispersal events or population declines.…”

Section: Discussionmentioning

confidence: 98%

Regional patterns in the invasion success of Cheiracanthium spiders (Miturgidae) in vineyard ecosystems

2009

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Invasions have often been linked to reduced biodiversity, but the role of non-native species in the decline of native species is ambiguous. In a 2003 survey of four California vineyard regions, exotic spiders (Cheiracanthium spp.) were more dominant in vineyards with lower spider species diversity and reduced spider abundance. There was no evidence for the role of species interactions in the invasion of Cheiracanthium spiders, however, as native spiders from the same feeding guild were most abundant in regions with high Cheiracanthium levels. Comparison with a survey conducted 10 years earlier indicated that the recent invader C. mildei simply represented an addition to the spider community, with no apparent change in proportions of the congener C. inclusum. Invasion success is discussed with respect to agricultural habitat, as results suggest that disturbed conditions in many vineyards may favor Cheiracanthium spp. and native wandering spiders while decreasing overall spider diversity.

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Intraguild Predation Usually does not Disrupt Biological Control

Cited by 102 publications

References 65 publications

Approaches to conserving natural enemy populations in greenhouse crops: current methods and future prospects

Approaches to conserving natural enemy populations in greenhouse crops: current methods and future prospects

Pest species diversity enhances control of spider mites and whiteflies by a generalist phytoseiid predator

Regional patterns in the invasion success of Cheiracanthium spiders (Miturgidae) in vineyard ecosystems

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