Exploration for olive fruit fly parasitoids across Africa reveals regional distributions and dominance of closely associated parasitoids

Wang, Xingeng; Walton, Vaughn M.; Hoelmer, Kim A.; Pickett, Charles H.; Blanchet, Alain; Straser, Robert K.; Kirk, Alan A.; Daane, Kent M.

doi:10.1038/s41598-021-85253-y

Cited by 16 publications

(10 citation statements)

References 59 publications

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“…europaea ). Surveys of olive-associated entomofauna have mostly been conducted in sub-Saharan Africa and Asia and focus on the discovery and cataloguing of parasitoid wasps [ 1 , 2 , 3 , 4 ], as B. oleae lacks specialized natural enemies in the ancestral olive-growing Mediterranean region and in its expanded North American range [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Mitogenomics of the Olive Seed Weevil, Anchonocranus oleae Marshall and Implications for Its Phylogenetic Position in Curculionidae

Smit

Allsopp

Nethavhani

et al. 2022

Insects

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Anchonocranus oleae Marshall (Coleoptera: Curculionidae) is a seed-feeding weevil native to southern Africa; its larvae are known to develop in the fruits of the African Wild Olive and, more rarely, cultivated olives. The species has been mainly found in the Western Cape province of South Africa, but it has remained in relative obscurity because it does not seem to represent a current threat to commercial olive production. As part of an ongoing effort to produce baseline genetic data for olive-associated entomofauna in South Africa, we generated reference DNA barcodes for A. oleae collected from wild and cultivated olives and sequenced its mitogenome for assessment of the phylogenetic position of the species in the family Curculionidae. The mitochondrial phylogeny estimate indicated that A. oleae shares a common ancestor with Elaidobius (tribe Derelomini), but a definite and close relationship to this tribe and the precise tribal placement of A. oleae in the subfamily Curculioninae could not be inferred due to the lack of representative mitogenomes of other relevant curculionine tribes and genera. This study will assist future work on the DNA-based species identification, genetic diversity, and phylogenetic position of the genus Anchonocranus and related taxa.

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Section: Introductionmentioning

confidence: 99%

Mitogenomics of the Olive Seed Weevil, Anchonocranus oleae Marshall and Implications for Its Phylogenetic Position in Curculionidae

Smit

Allsopp

Nethavhani

et al. 2022

Insects

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“…Their spermathecae were photographed with a camera (Jenoptic Gryphax Naos), and using the camera software (GRYPHAX version 2.1.0.724), the lengths of the major and minor axis (DST1 and DST2) of each spermatheca vesicle were measured (Figure 1). Each vesicle was considered a spheroid [20] and its volume was estimated using Equation (1), where r 1 corresponds to the length of its semi-major axis and r 2 to the length of its semi-minor axis.…”

Section: Spermathecae Volumementioning

confidence: 99%

“…The olive fruit fly (Bactrocera oleae Diptera, Tephritidae) is a major pest of olives and its distribution now covers the Mediterranean basin, North and Sub-Saharan Africa, southwest Asia and North America [1]. The developing larvae of the fly feed on the mesocarp of the fruit, causing more than 90% of crop losses if the population is not managed [2].…”

Section: Introductionmentioning

confidence: 99%

Mating Competition between Wild and Artificially Reared Olive Fruit Flies

Terzidou

Koveos

Kouloussis

2022

Crops

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Mating success of artificially reared males of the olive fruit fly is essential for genetic control techniques for this pest. We studied the mating competition between males from a laboratory-adapted population reared with an artificial diet and wild males emerged from field-infested olives and grown in olives in the laboratory. We maintained virgin wild females or artificially reared females in cages together with virgin wild and artificially reared males and scored the percentages of different males in the mated pairs, mating latency, and mating duration. After mating, we determined the egg production and the size of spermathecae of females mated with different males. Our results indicate that artificially reared males are competitive to the wild males, and they mated in similar percentages with wild and artificially reared females. Mean mating latencies (SE) of wild females that mated with wild and artificially reared males were 69.8 (4.8) min (n = 39) and 114.6 (8.1) (n = 43) min, respectively. No difference was discovered in the mating duration or egg production between females that mated with a wild or artificially reared male. Wild females had higher spermathecae volume when they mated with wild males compared to artificially reared males (two-tailed t-test = −2.079, df = 54, p = 0.0423).

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“…The olive fruit fly has been an important pest of olives in Mediterranean countries for at least 2000 years 27 and in 1998 it was first detected in California 28 . The distribution of the pest now covers the Mediterranean basin, north and sub-Saharan Africa, south-west Asia and North America 29 . Mating in B. oleae occurs during the last hours of the photophase and at that time high-pitched sounds have been recorded in cages with males 30 .…”

Section: Introductionmentioning

confidence: 99%

Acoustic characteristics of sound produced by males of Bactrocera oleae change in the presence of conspecifics

Terzidou

Kouloussis²,

Papanikolaou³

et al. 2022

Sci Rep

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Males of the olive fruit fly Bactrocera oleae vibrate and stridulate their wings at dusk producing sounds different from flight sounds with no confirmed behavior role. We recorded and performed a temporal-spectral analysis of this sound. Sound produced by male wing vibration/stridulation consists of intermittent pulses of highly variable duration and of fundamental frequency of around 350 Hz. Flight sound has a much lower fundamental frequency of approximately 180 Hz. Males begin to display wing vibration and sound production at the beginning of their sexual maturity at the 5th day of their age. This behavior is more pronounced in the presence of another conspecific male and observed less in male–female pairs or in solitary males. Broadcasts of the recorded sound did not attract flies of either sex. The highest fundamental frequency was found in association with wing vibrations emitted by male–male pairs, followed by those emitted by male–female pairs and then solitary males, which showed the lowest frequency values. The mean pulse duration and interpulse interval were shorter in male–male pairs than in male–female pairs. We assume that the male wing vibration and the produced signal, apart from its possible role in the courtship of the females, could also be associated with male–male interactions for territorial and rival activities, for which further experiments are required.

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Exploration for olive fruit fly parasitoids across Africa reveals regional distributions and dominance of closely associated parasitoids

Cited by 16 publications

References 59 publications

Mitogenomics of the Olive Seed Weevil, Anchonocranus oleae Marshall and Implications for Its Phylogenetic Position in Curculionidae

Mitogenomics of the Olive Seed Weevil, Anchonocranus oleae Marshall and Implications for Its Phylogenetic Position in Curculionidae

Mating Competition between Wild and Artificially Reared Olive Fruit Flies

Acoustic characteristics of sound produced by males of Bactrocera oleae change in the presence of conspecifics

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