Wheat bulb fly (<i>Delia coarctata</i>, Fallén, Diptera: Anthomyiidae) larval response to hydroxamic acid constituents of host-plant root exudates

Rogers, Craig D.; Evans, K. E.

doi:10.1017/s0007485312000661

Cited by 9 publications

(14 citation statements)

References 43 publications

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“…Another specialized root herbivore, the wheat bulb fly ( Delia coarctata ), showed remarkable attraction to wheat seedling exudates (Rogers and Evans 2013). MBOA attracted larvae in a dose-dependent fashion and might contribute to the activity of the exudate, while DIMBOA elicited a weaker response.…”

Section: Biological Effects Of Bxdsmentioning

confidence: 99%

Plant defense and herbivore counter-defense: benzoxazinoids and insect herbivores

et al. 2016

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Benzoxazinoids are a class of indole-derived plant chemical defenses comprising compounds with a 2-hydroxy-2H-1,4-benzoxazin-3(4H)-one skeleton and their derivatives. These phytochemicals are widespread in grasses, including important cereal crops such as maize, wheat and rye, as well as a few dicot species, and display a wide range of antifeedant, insecticidal, antimicrobial, and allelopathic activities. Although their overall effects against insect herbivores are frequently reported, much less is known about how their modes of action specifically influence insect physiology. The present review summarizes the biological activities of benzoxazinoids on chewing, piercing-sucking, and root insect herbivores. We show how within-plant distribution modulates the exposure of different herbivore feeding guilds to these defenses, and how benzoxazinoids may act as toxins, feeding deterrents and digestibility-reducing compounds under different conditions. In addition, recent results on the metabolism of benzoxazinoids by insects and their consequences for plant-herbivore interactions are addressed, as well as directions for future research.

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Section: Biological Effects Of Bxdsmentioning

confidence: 99%

Plant defense and herbivore counter-defense: benzoxazinoids and insect herbivores

et al. 2016

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“…The larvae of the wheat bulb fly use chemotaxis and chemokinesis to locate host plants and are known to use primary and secondary metabolites, including carbon dioxide, hydroxamic acids, syringic acid and vanillic acid, as search cues. It has been suggested that primary metabolites such as carbon dioxide act as search triggers for wheat bulb fly larvae to induce searching behaviour which makes the larvae more likely to encounter the more plant specific secondary metabolites when they are near a suitable host plant (Rogers & Evans, 2013, 2014; Rogers et al , 2013). Further studies are needed to assess whether exudates from attractive versus non‐attractive lines of the Watkins collection have different behavioural effects on wheat bulb fly larvae and if there are any differences in root exudate chemistry.…”

Section: Discussionmentioning

confidence: 99%

Searching for wheat resistance to aphids and wheat bulb fly in the historical Watkins and Gediflux wheat collections

Aradottir

Martin

Clark

et al. 2016

Annals of Applied Biology

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Insect pests can reduce wheat yield by direct feeding and transmission of plant viruses. Here we report results from laboratory and field phenotyping studies on a wide range of wheat, including landraces from the Watkins collection deriving from before the green revolution, more modern cultivars from the Gediflux collection (north‐western Europe) and modern UK Elite varieties, for resistance to the bird cherry‐oat aphid, Rhopalosiphum padi (Homoptera: Aphididae) and the English grain aphid, Sitobion avenae (Homoptera: Aphididae). A total of 338 lines were screened for R. padi and 340 lines for S. avenae. Field trials were also conducted on 122 Watkins lines to identify wheat bulb fly, Delia coarctata, preference on these landraces. Considerable variation was shown in insect performance among and within different wheat collections, with reduced susceptibility in a number of varieties, but phenotyping did not identify strong resistance to aphids or wheat bulb fly. Field trials showed within collection differences in aphid performance, with fewer aphids populating lines from the Watkins collection. This differs from development data in laboratory bioassays and suggests that there is a pre‐alighting cue deterring aphid settlement and demonstrates differences in aphid preference and performance on older plants in the field compared with seedlings in the laboratory, highlighting the need for phenotyping for aphid resistance at different plant growth stages. No association was identified between performance of the different insect species on individual varieties, potentially suggesting different nutritional requirements or resistance mechanisms.

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“…Wheat bulb fly eggs were harvested from potato fields in East Lothian, UK (56°02′32.5050″N, 2°46′45.3388″W). The eggs were washed in 0.3% NaOCl solution for 2 min and rinsed in sterile distilled water for sterilization (Bellows & Fisher, ; Rogers & Evans, ). Eggs were then housed in sterile 90‐mm‐diameter Petri dishes containing vermiculite (moistened with sterile distilled water) on black nylon mesh and stored at 5 °C for 2 months (Rogers, ).…”

Section: Methodsmentioning

confidence: 99%

“…Arenas were the same as those used by Marriott & Evans () and Rogers & Evans (). In brief, they consisted of a black filter paper (Whatman 551; 90 mm diameter) placed in the centre of a glass Petri dish (140 mm diameter).…”

Section: Methodsmentioning

confidence: 99%

“…Larvae of WBF have been shown to locate host‐plant seedlings through chemotaxis (Scott, ; Greenway et al., ; Marriott & Evans, ), utilising Poaceae‐specific secondary plant metabolites, such as the hydroxamic acids DIMBOA (2,4‐dihydroxy‐7‐methoxy‐1,4‐benzoxazin‐3‐one) and MBOA (6‐methoxy‐benzoxazolin‐2‐one) (Rogers & Evans, ). Furthermore, when exposed to elevated levels of the primary plant metabolite CO 2 , WBF larvae are induced to intensively search an area (Rogers et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Wheat bulb fly, Delia coarctata, larval attraction to phenolic components of host‐plant root exudates

Rogers

Evans

2013

Entomologia Exp Applicata

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Wheat bulb fly (WBF), Delia coarctata Fallén (Diptera: Anthomyiidae), larvae are a subterranean pest of wheat [Triticum aestivum L. (Poaceae)] and other cereals. Larvae locate host plants through chemotaxis and chemokinesis, utilising the primary plant metabolite carbon dioxide as a ‘search trigger’ and Poaceae‐specific secondary plant metabolites exuded from the plant. The aim of this study was to use arena bioassays to identify further compounds involved in the host‐finding process. The larval behavioural response to four concentrations of syringic and vanillic acid, chemical constituents of host‐plant exudates, were tested. Analysis of the final resting position of D. coarctata larvae by the Rayleigh test of uniformity identified attraction to wheat seedling exudates and to both compounds at the lowest concentrations tested, with syringic acid concentrations being most attractive at 0.1 mg l−1 and vanillic acid being most attractive at 0.001 mg l−1. These results add more detail to the subterranean chemical ecology of this species, allowing a behavioural sequence for host‐plant orientation by WBF larvae to be proposed.

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Wheat bulb fly (Delia coarctata, Fallén, Diptera: Anthomyiidae) larval response to hydroxamic acid constituents of host-plant root exudates

Cited by 9 publications

References 43 publications

Plant defense and herbivore counter-defense: benzoxazinoids and insect herbivores

Plant defense and herbivore counter-defense: benzoxazinoids and insect herbivores

Searching for wheat resistance to aphids and wheat bulb fly in the historical Watkins and Gediflux wheat collections

Wheat bulb fly, Delia coarctata, larval attraction to phenolic components of host‐plant root exudates

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