Effects of manipulated density of the wolf spider, Pardosa astrigera (Araneae: Lycosidae), on pest populations and cabbage yield: a field enclosure experiment

Suenaga, Hikaru; Hamamura, Tetsuzô

doi:10.1007/s13355-014-0310-y

Cited by 21 publications

(14 citation statements)

References 36 publications

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“…However, this assumption was based mostly on their functional traits, such as preying on multiple prey including other predators, and on a weak numerical response to pests, rather than on actual evidence based on manipulative experiments, as such experiments were limited in number at that time. Generalist predators can influence pest suppression positively, neutrally or negatively (Lang, ; Suenaga & Hamamura, ). The biocontrol efficacy of generalist predators seems therefore to be context‐dependent.…”

Section: Introductionmentioning

confidence: 99%

Global patterns in the biocontrol efficacy of spiders: A meta‐analysis

Michalko

Pekár

Duľa

et al. 2019

Global Ecol Biogeogr

112

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Aim To investigate the overall effect of spiders on pest suppression and crop performance, and to explore the extent to which the biocontrol efficacy of spiders depends on the characteristics of spiders, pests, agroecosystems, climate and geography. Location Global. Time period 1970–2017. Major taxa studied Spiders. Methods We performed a meta‐analysis of 58 published studies where we investigated (a) the overall effect of spiders on pest density and crop performance; (b) the extent to which the biocontrol efficacy of spiders depends on the taxonomy of pests (aphids, leafhoppers, beetles, and lepidopteran larvae), the hunting strategy of spiders (hunters, web‐weavers), crop type (vine, cabbage, wheat, rice), climate, and geography. Results Spiders suppressed agricultural pest insects in 79% of cases. The mean effect size of increased spider density on pest suppression was large (Hedge's d = 0.89; 95% confidence interval (CI95 )= 0.66–1.12). Spider pest suppression efficacy slightly increased also with taxonomic diversity (d = 0.33; CI95 = 0.05–0.61). The effects of spiders cascaded down and improved crop performance (d = 2.3, CI95 = 0.70–3.84). The effects of spiders seemed to escalate rather than attenuate down through the agricultural food‐chains (regression slopes > 1). The biocontrol efficacy of spiders was highest in rice followed by grape, cabbage and wheat. The pest suppression efficacy of spiders and the positive effect of spiders on crop yield slightly increased towards the tropics and with mean annual temperature. Spiders suppressed the four pest groups with similar efficacy. Main conclusions The meta‐analysis provides strong evidence that spiders are effective in natural pest control and improve crop performance. However, the efficacy of spiders differed among crops. Our study substantiates the few earlier findings that predation pressure and the intensity of trophic cascades in terrestrial ecosystems intensify towards the tropics.

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Section: Introductionmentioning

confidence: 99%

Global patterns in the biocontrol efficacy of spiders: A meta‐analysis

Michalko

Pekár

Duľa

et al. 2019

Global Ecol Biogeogr

112

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“…Syrphids have been reported to respond positively to increasing aphid densities (Honěk, ; Tamaki & Long, ). Spiders, in turn, are generalist predators and their diet varies throughout the year (Grez, Zaviezo, & Gardiner, ; Suenaga & Hamamura, ), depending on the prey availability. They were recorded consistently in our study, even when the aphid populations were low.…”

Section: Discussionmentioning

confidence: 99%

Contributions of climate, plant phenology and natural enemies to the seasonal variation of aphids on cabbage

Fidelis

Farias

Lopes

et al. 2019

J Applied Entomology

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Brevicoryne brassicae (L), Lipaphis erysimi (Kalt) and Myzus persicae (Sultzer) (Homoptera: Aphididae) form the aphid complex that causes great losses in Brassicaceae in tropical and subtropical regions. Knowledge of their population dynamics is important for the development of integrated pest management programmes. This study aimed to investigate the effects of cabbage phenology, climatic factors and natural enemies populations on the dynamics of these organisms, and the factors regulating their predators’ occurrence. The densities of aphids and their natural enemies and the climate were monitored for two years in 16 cabbage crops. The highest densities of the aphids occurred during periods of relative humidity (RH) drop, a condition that affects them positively. Regarding the predators, the factors affecting their abundance varied but RH was positively related to most of them. This study provides relevant insights into the factors that regulate the aphids in cabbage and for the decision‐making process of control of these severe pests.

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“…; Rosenheim et al. ; Suenaga and Hamamura ). Nevertheless, the ability of crops to mount compensatory responses to herbivory is highly contextual (Maschinski and Whitham ; Rosenheim and Meisner ), and herbivory does in some cases cause yield losses that sometimes show a linear, or at least continuous, increasing form (Cardinale et al.…”

Section: Compensatory Evolution Phenotypic Plasticity and Linear Yiementioning

confidence: 97%

“…not to diseases vectored by pests) and (ii) a linear relationship between pest mortality and yield loss. However, deviations from a linear relationship are known to exist on account of compensatory growth following herbivory for many crops (Maschinski and Whitham 1989;Dyer et al 1993;Williams et al 1995;Rosenheim et al 1997;Suenaga and Hamamura 2015). Nevertheless, the ability of crops to mount compensatory responses to herbivory is highly contextual (Maschinski and Whitham 1989;Rosenheim and Meisner 2013), and herbivory does in some cases cause yield losses that sometimes show a linear, or at least continuous, increasing form (Cardinale et al 2003;Maas et al 2013;Rosenheim and Meisner 2013;Liere et al 2014).…”

Section: Compensatory Evolution Phenotypic Plasticity and Linear Yiementioning

confidence: 99%

Fitness trade‐offs in pest management and intercropping with colour: an evolutionary framework and potential application

Farkas

2015

Evolutionary Applications

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An important modern goal of plant science research is to develop tools for agriculturalists effective at curbing yield losses to insect herbivores, but resistance evolution continuously threatens the efficacy of pest management strategies. The high-dose/refuge strategy has been employed with some success to curb pest adaptation, and has been shown to be most effective when fitness costs (fitness trade-offs) of resistance are high. Here, I use eco-evolutionary reasoning to demonstrate the general importance of fitness trade-offs for pest control, showing that strong fitness trade-offs mitigate the threat of pest adaptation, even if adaptation were to occur. I argue that novel pest management strategies evoking strong fitness trade-offs are the most likely to persist in the face of unbridled pest adaptation, and offer the manipulation of crop colours as a worked example of one potentially effective strategy against insect herbivores.

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Effects of manipulated density of the wolf spider, Pardosa astrigera (Araneae: Lycosidae), on pest populations and cabbage yield: a field enclosure experiment

Cited by 21 publications

References 36 publications

Global patterns in the biocontrol efficacy of spiders: A meta‐analysis

Global patterns in the biocontrol efficacy of spiders: A meta‐analysis

Contributions of climate, plant phenology and natural enemies to the seasonal variation of aphids on cabbage

Fitness trade‐offs in pest management and intercropping with colour: an evolutionary framework and potential application

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