Influence of walnut cultivar on infestation by Rhagoletis completa: behavioural and management implications

Guillén, Larissa; Aluja, Martı́n; Rull, Juan; Höhn, H.; Schwizer, Thomas; Samietz, Jörg

doi:10.1111/j.1570-7458.2011.01157.x

Cited by 22 publications

(28 citation statements)

References 33 publications

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“…In this study, the percentage of infested fruits was positively correlated to the fruit weight. This occurrence is in agreement with the results of Guillén et al () who observed that the larger fruits are more attractive to R. completa females as an egg‐laying site. Furthermore, the number of pupae per fruit has been related to the weight of the fruit (Aluja et al, ).…”

Section: Discussionsupporting

confidence: 93%

Altitude affects the distribution and abundance of two non‐native insect pests of the common walnut

Poggetti

Raranciuc

Chiabà

et al. 2019

J Applied Entomology

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The leaf miner Coptodisca lucifluella and the carpophagous Rhagoletis completa, of American origin, are two non‐native walnut (Juglans spp.) pests in Italy. For the Friuli Venezia Giulia region (FVG) (N‐E Italy), C. lucifluella is not yet listed, while R. completa has been present for over 25 years. During 2015, samples of leaves and fruits were collected from 219 single old common walnut trees (Juglans regia) placed at different altitudes (0–1,073 m a.s.l.) in FVG to detect the distribution and abundance of both pests. Samples of leaf miner larvae and their parasitoids were subjected to mitochondrial DNA analysis for identification. C. lucifluella has been found in 55 out of 219 sites. The species has been identified by typical leaf symptoms and by its DNA barcode. This is the first report of the species for FVG. The leaf miner distribution was negatively correlated with altitude. The species has not been observed at sites over 600 m a.s.l. Larvae were parasitized by native parasitoids identified as belonging to the genus Chrysocharis by morphological features and by DNA barcode. R. completa has been found in 89 out of 165 sites on walnut trees with fruits. The infestation level was very high in lowland localities. At sites over 700 m a.s.l., no infestation was found. Both species are widespread in the region, and their occurrence is significantly affected by altitude. Data suggest that walnut trees could be cultivated in some mountain areas without the need to control R. completa with insecticides.

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Section: Discussionsupporting

confidence: 93%

Altitude affects the distribution and abundance of two non‐native insect pests of the common walnut

Poggetti

Raranciuc

Chiabà

et al. 2019

J Applied Entomology

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“…It has been proven for other species of Rhagoletis that diapause duration is genetically determined, highly variable, and that it responds to selection imposed by host plant fruiting phenology (Feder et al, 1997;Prokopy & Papaj, 2000). Walnutinfesting Rhagoletis can survive as adults in the laboratory for 40-70 days (Guillen et al, 2011). Host plant phenology can have evolutionary consequences.…”

Section: Discussionmentioning

confidence: 99%

Precopulatory mating and postzygotic isolation between two walnut‐infesting species of Rhagoletis from Mexican highlands

Tadeo

Aluja

Rull

2018

Entomologia Exp Applicata

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Pleistocene glacial and postglacial cycles producing contraction and expansion of temperate habitats have resulted in substantial diversification among several plant and animal taxa of Neararctic origin undergoing periods of isolation and secondary contact in high-elevation areas of Mexico. One of such groups are walnut-infesting fruit flies in the genus Rhagoletis (Diptera: Tephritidae), comprised of six recently derived species among which phylogenetic relationships have been difficult to unravel using conventional molecular methods. Here, we examined pre-and postzygotic isolation between two genetically similar and morphologically distinct species which are currently parapatric in central Mexico. Local adaptation driven by differences in host plant phenology between Rhagoletis zoqui Bush and Rhagoletis ramosae Hern andez-Ort ız resulted in allochronic isolation. Despite the existence of precopulatory mating isolation, there was a substantial number of hybrid matings in field cages where conspecific and heterospecific males and females were simultaneously released. The bulk of mating activity took place on host fruit. Rhagoletis zoqui females were more reluctant to mate with R. ramosae males than with males of their own species. Distinctive behavioral differences were observed between males during contests, fruit guarding, and approach to conspecifics on fruit. There was also some asymmetric postzygotic isolation, with the hybrid combination of R. zoqui males and R. ramosae females resulting in lower egg hatch than other mating combinations. Results were consistent with those of a phylogenetic study suggesting recent divergence of R. ramosae from Rhagoletis completa Cresson and R. zoqui in the Sierra Madre Oriental and the Mexican Trans Volcanic Belt.

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“…and R. completa (Guillén et al. ), Toxotrypana curvicauda (Aluja et al. ) and several Bactrocera and Dacus species (Raghu et al.…”

Section: Discussionmentioning

confidence: 99%

Resting sites, edge effects and dispersion of a polyphagous Bactrocera fruit fly within crops of different architecture

Balagawi

Jackson

Clarke

2013

J Applied Entomology

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The spot or strip application of poisoned protein bait is a lure‐and‐kill technique used for the management of fruit flies. Knowledge of where flies occur in the crop environment is an important part of maximizing the efficacy of this tool. Bactrocera tryoni is a polyphagous pest of horticulture for which very little is known about its distribution within crops. With particular reference to edge effects, we monitored the abundance of B. tryoni in two crops of different architecture; strawberry and apple. In strawberries, we found more flies on the crop edge early in the fruiting season, which lessened gradually and eventually disappeared as the season progressed. In apple orchards, no such edge effect was observed and flies were found equally throughout the orchard. We postulated these differences may be due to differences in crop height (high vs. short) and/or crop canopy architecture (opened and branched in apple, dense and closed in strawberry). In a field cage trial, we tested these predictions using artificial plants of different height and canopy condition. Height and canopy structure type had no significant effects on fly oviposition and protein feeding, but the ‘apple’ type canopy significantly influenced resting. We thus postulate that there was an edge effect in strawberry because the crop was not providing resting sites and flies were doing so in vegetation around the field margins. The finding that B. tryoni shows different resting site preferences based on plant architecture offers the potential for strategic manipulation of the fly through specific border or inter‐row plantings.

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Influence of walnut cultivar on infestation by Rhagoletis completa: behavioural and management implications

Cited by 22 publications

References 33 publications

Altitude affects the distribution and abundance of two non‐native insect pests of the common walnut

Altitude affects the distribution and abundance of two non‐native insect pests of the common walnut

Precopulatory mating and postzygotic isolation between two walnut‐infesting species of Rhagoletis from Mexican highlands

Resting sites, edge effects and dispersion of a polyphagous Bactrocera fruit fly within crops of different architecture

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