The spatial distribution of phytophagous insect larvae in grassland soils

Benefer, Carly M.; Andrew, Peter; Blackshaw, R. P.; Ellis, Jonathan S.; Knight, Mairi E.

doi:10.1016/j.apsoil.2010.05.002

Cited by 26 publications

(23 citation statements)

References 44 publications

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“…It was positively correlated with damage in both years (Table 2). This is consistent with the literature, which reports that grassland is the natural habitat of wireworms (Parker and Howard 2001) and the preferred laying site for females (e.g., Benefer et al 2010). However, when extreme values of damage were removed from the analysis of 2012 data, its importance decreased to 0.3 (Fig.…”

Section: Effect Of Agricultural Practicessupporting

confidence: 81%

Management of wireworm damage in maize fields using new, landscape-scale strategies

Saussure

Plantegenest

Thibord

et al. 2015

Agron. Sustain. Dev.

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Crop-damaging wireworms-the soil-dwelling larvae of click beetles-have resurged in Europe over the past 15 years, particularly in French maize crops. There is currently no curative treatment available to control wireworms, and preventive treatments are mainly chemical. We therefore need to better understand factors that rule damage for developing agroecological control strategies. In this investigation, we tested the effect of agricultural practices and local landscape on wireworm damage in maize crops. We surveyed wireworm damage in 341 fields under various conditions in western France in 2011 and 2012. We used in particular a random forest algorithm to impute missing values and an automated model selection routine to select the best beta regression model. Our results show that the occurrence of grassland in the rotation increases wireworm damage. Tillage also shows a high influence, though varying with season and year. Wireworm damage is decreased by the presence of hedges or cultivated crops at the field border, whereas it is increased by the presence of grassland at the field border. Overall, our findings provide some insights to develop preventive solutions for the sustainable control of wireworms, as well as a framework for data processing to analyze a wide range of similar situations involving other crops and pests.

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Section: Effect Of Agricultural Practicessupporting

confidence: 81%

Management of wireworm damage in maize fields using new, landscape-scale strategies

Saussure

Plantegenest

Thibord

et al. 2015

Agron. Sustain. Dev.

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“…Adrastus montanus (Scopoli)) from the very similar looking Agriotes larvae. The new primers will be useful for studies dealing with other wireworm genera where identification to species level was not yet possible (Benefer et al 2010; Parker and Seeney 1997; Samson and Calder 2003). …”

Section: Discussionmentioning

confidence: 99%

Occurrence of Agriotes wireworms in Austrian agricultural land

et al. 2011

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Agriotes wireworms (Coleoptera: Elateridae) are abundant soil-dwelling herbivores which can inflict considerable damage to field crops. In Europe up to 40 species occur, differing in their ecology and pest status. Their distribution in the larval stage, however, has rarely been assessed because of the considerable effort in collecting wireworms and the difficulties in identifying them to species-level. Here, we examined the occurrence of Agriotes wireworms in Austrian agricultural land with regard to their association with climatic and soil parameters. Using a molecular identification system, 1348 field-collected larvae from 85 sites were identified to species-level. Three species, Agriotes obscurus, Agriotes brevis, Agriotes ustulatus, and two that could not be discerned molecularly (Agriotes lineatus and Agriotes proximus), were assigned to two ecological groups: (i) A.brevis/A. ustulatus, found in areas with a warmer, drier climate and alkaline soils, and (ii) A. obscurus/A. lineatus/proximus which occur mainly at higher altitude characterised by lower temperatures, higher precipitation and acidic, humus-rich soils. Agriotes sputator was abundant throughout Austria, confirming its euryoecious nature. Only one larva of Agriotes litigiosus was found, prohibiting further analysis. These data contribute to a characterisation of species-specific traits in Agriotes larvae in agricultural land, an important prerequisite to develop efficient control strategies for these wireworms.Electronic supplementary materialThe online version of this article (doi:10.1007/s10340-011-0393-y) contains supplementary material, which is available to authorized users.

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“…This approach meant that there were slight variations between the population sizes within individual cores, due to the spatial heterogeneity of soil itself, which is largely affected by the scale of sampling. [54] In other studies it has been hypothesised that the heterogeneous distribution of the tracer may also influence the variability in isotopic ratios of soil organisms. [22] However, using a modified soil injector reduces this effect, as it introduces the bacteria uniformly throughout the soil cores.…”

Section: Discussionmentioning

confidence: 99%

Tracking the flow of bacterially derived¹³C and¹⁵N through soil faunal feeding channels

Crotty

Blackshaw

Murray

2011

Rapid Comm Mass Spectrometry

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The soil food web has been referred to as a 'black box', a 'poor man's tropical rainforest' and an 'enigma', due to its opacity, diversity and the limited insight into feeding specificity. Here we investigate the flow of C and N through the soil food web as a way to gain understanding of the feeding interactions occurring. A bacterium, Pseudomonas lurida, was introduced to soil cores from two different habitats, a grassland and a woodland with the same soil type, enriched to 99 atom% in (13)C and (15)N, to trace the flow of bacterial C and N through the soil food web. Throughout the experiment the soil remained enriched in (13)C and (15)N. Almost all the invertebrates tested gained C and N enrichment indicative of the labelled bacteria, implying that bacterial feeding is a common mechanism within the soil. Only three groups were significantly enriched in both (13)C and (15)N in both habitats. These were Collembola (Entomobryomorpha), Acari (Oribatida), and Nematoda, indicating that these organisms are consuming the most bacteria within both systems. When the invertebrates were grouped into hypothesised trophic levels, those considered secondary decomposers were gaining the most enrichment across all invertebrates tested. This enrichment was also high in the micro-predators within the soil, implying that their main food source was the secondary decomposers, particularly the Collembola. Using an enriched bacterium to track the trophic transfer between organisms within the soil food web is a novel way of empirically showing that interactions are occurring, which normally cannot be seen.

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The spatial distribution of phytophagous insect larvae in grassland soils

Cited by 26 publications

References 44 publications

Management of wireworm damage in maize fields using new, landscape-scale strategies

Management of wireworm damage in maize fields using new, landscape-scale strategies

Occurrence of Agriotes wireworms in Austrian agricultural land

Tracking the flow of bacterially derived¹³C and¹⁵N through soil faunal feeding channels

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The spatial distribution of phytophagous insect larvae in grassland soils

Cited by 26 publications

References 44 publications

Management of wireworm damage in maize fields using new, landscape-scale strategies

Management of wireworm damage in maize fields using new, landscape-scale strategies

Occurrence of Agriotes wireworms in Austrian agricultural land

Tracking the flow of bacterially derived13C and15N through soil faunal feeding channels

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Tracking the flow of bacterially derived¹³C and¹⁵N through soil faunal feeding channels