Olive cultivar and maturation process on the oviposition preference of<i>Bactrocera oleae</i>(Rossi) (Diptera: Tephritidae)

Malheiro, Ricardo; Casal, Susana; Pinheiro, Lara A.; Baptista, Paula; Pereira, José Alberto

doi:10.1017/s0007485318000135

Cited by 17 publications

(13 citation statements)

References 30 publications

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“…However, regardless of the reason for the egg-laying site selection, insects choose to lay eggs on well-nourished hosts or tissue to ensure the healthy development and survival of their offspring (Jeong et al, 2016;Malheiro et al, 2018;Mitchell et al, 2019). Here, we found that O. strigicollis laid the most eggs at the tip of the KBPs, which indicated this location as their preferred oviposition site.…”

Section: Discussionmentioning

confidence: 67%

“…Of the many plant morphological features, the plant physical structure is one of the important factors that is known to significantly affect this reproductive behavior, either positively (Benedict, Leigh & Hyer, 1983;Griffen & Yeargan, 2002) or negatively (Simmons & Gurr, 2004). The mechanisms that drive female oviposition decisions have evolved such that female insects will choose sites with the optimal plant-based resources for the survival of their offspring (Malheiro et al, 2018;Mitchell et al, 2019). However, whether other factors influence the choice of oviposition sites by predatory insects remains to be explored.…”

Section: Introductionmentioning

confidence: 99%

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The predatory bug Orius strigicollis shows a preference for egg-laying sites based on plant topography

Huang

Ren

et al. 2021

PeerJ

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Background Oviposition site selection is an important factor in determining the success of insect populations. Orius spp. are widely used in the biological control of a wide range of soft-bodied insect pests such as thrips, aphids, and mites. Orius strigicollis (Heteroptera: Anthocoridae) is the dominant Orius species in southern China; however, what factor drives its selection of an oviposition site after mating currently remains unknown. Methods Here, kidney bean pods (KBPs) were chosen as the oviposition substrate, and choice and nonchoice experiments were conducted to determine the preferences concerning oviposition sites on the KBPs of O. strigicollis. The mechanism of oviposition behavior was revealed through observation and measurement of oviposition action, the egg hatching rate, and the oviposition time. Results We found that O. strigicollis preferred the seams of the pods for oviposition, especially the seams at the tips of the KBPs. Choice and nonchoice experiments showed that females did not lay eggs when the KBP tail parts were unavailable. The rates of egg hatching on different KBP parts were not significantly different, but the time required for females to lay eggs on the tip seam was significantly lower. Decreased oviposition time is achieved on the tip seam because the insect can exploit support points found there and gain leverage for insertion of the ovipositor. Discussion The preferences for oviposition sites of O. strigicollis are significantly influenced by the topography of the KBP surface. Revealing such behavior and mechanisms will provide an important scientific basis for the mass rearing of predatory bugs.

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Section: Discussionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

The predatory bug Orius strigicollis shows a preference for egg-laying sites based on plant topography

Huang

Ren

et al. 2021

PeerJ

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“…Megaritiki. Variation among different olive varieties in the emitted fruit VOCs may be related to their susceptibility to injury by the olive fly, although other factors could also be involved in the olive fly's preference such as the maturity index, weight and volume (Gonçalvez et al., 2012; Neuenschwander et al., 1985), fruit colour (Katsoyannos & Kouloussis, 2001; Malheiro, Casal, Cunha, et al., 2015; Malheiro et al., 2018; Neuenschwander et al., 1985), surface waxes (Kombargi et al., 1998) and fatty acid composition (Gonçalvez et al., 2012).…”

Section: Discussionmentioning

confidence: 99%

Determination of volatile substances in olives and their effect on reproduction of the olive fruit fly

Kokkari

Milonas

Anastasaki

et al. 2021

J Applied Entomology

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Females of the olive fruit fly Bactrocera oleae lay their eggs in olives mainly using fruit volatile stimuli. Using GC‐MS analysis, we determined the chemical composition of the volatile blend emitted from field‐collected olive fruit of cv. Megaritiki, at different stages of maturity. GC‐MS analysis demonstrated qualitative and quantitative differences in the headspace blend emitted by the olive fruit. Certain chemicals such as toluene, n‐octane, α‐pinene, limonene, ethyl hexanol, nonanal n‐dodecane, decanal and n‐tetradecane were detected in greater amounts, irrespective of the growth stage of the fruit. The flies’ exposure to a number of these chemicals, such as n‐octane and α‐pinene, as well as to a mixture consisting of n‐octane, α‐pinene, limonene, ethyl hexanol, nonanal, n‐dodecane, decanal and n–tetradecane favoured successful mating and egg production. The results may contribute to the improvement of the mass rearing of the fly, through these findings, which illustrate the positive effect that certain fruit volatile chemicals have on the fly's reproduction and offer a better understanding of the relation between the fly and the host fruit.

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“…Fruit characteristics are crucial for the oviposition site selection of B. oleae 6,29 . Moreover, the quality of oviposition sites can be deeply altered by exogenous factors, as the presence of prior infestations 5 .…”

Section: Discussionmentioning

confidence: 99%

“…Aside from female oviposition preferences, fruit characteristics may influence the larval development 4 . Among fruit features, the ripening stage influences B. oleae oviposition choices, since females generally prefer to oviposit on unripe green olives 4,6 . To successfully locate and select oviposition sites, B. oleae adult females mainly rely on olfactory cues, namely volatile organic compounds (VOCs, hereafter) produced by the tree 20 .…”

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confidence: 99%

Olive fruit volatiles route intraspecific interactions and chemotaxis in Bactrocera oleae (Rossi) (Diptera: Tephritidae) females

Giunti¹,

Campolo²,

Laudani³

et al. 2020

Sci Rep

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Plant nutritional quality and chemical characteristics may affect the fitness of phytophagous insects.Here, the olfactory preferences of Bactrocera oleae (Rossi) females toward olives with different maturation and infestation status were evaluated in three cultivars: Ottobratica, Roggianella and Sinopolese. Volatile profiles from olives were identified by SPME/GC-MS. Choice tests were performed to determine the responses of B. oleae adult females toward fruits and pure chemicals linked to infestation degree. Cultivar was the main source of variability explaining the differences recorded in volatile emissions. Moreover, three VOCs [β-myrcene, limonene and (E)-β-ocimene] were associated to infestation status across all olive varieties. In choice-tests, B. oleae females always preferred the olfactory cues from low-infested over high-infested fruits. Therefore, choice-tests using synthetic VOCs, emitted in greater amount by high-infested fruit, were arranged in order to identify putative B. oleae kairomones. While females were indifferent to β-myrcene, the highest dosages of limonene and (E)β-ocimene were unfavoured by the tested flies, which preferentially moved toward the empty arm of the Y-tube. Furthermore, females preferred the lowest concentration of β-ocimene compared to the highest one. These results supported our hypothesis that fruit VOCs may serve as kairomones for female flies.Environmental conditions, food availability and ovipositional sites are crucial for phytophagous-insect survival 1,2 . The nutritional quality and the attractiveness of plants may influence the fitness of herbivores and be a key factor for oligophagous species, which can rely on a restricted number of host-plants 3,4 . Therefore, the recognition of suitable ovipositional sites is critical for several fruit flies 5,6 .Bactrocera oleae (Rossi) (Diptera: Tephritidae), commonly known as the olive fruit fly, is a strictly monophagous pest, which can feed exclusively on Olea species. The larval stages feed and develop solely inside olive drupes, excavating galleries inside the pulp. The fully developed larvae open an exit hole on the olive surface and usually pupate outside the fruit. During the oviposition process, B. oleae females carefully choose suitable fruit for oviposition, either performing aggressive behaviours toward conspecifics to gain and maintain the oviposition site 7 . In the Mediterranean area, the olive fruit fly population commonly increases during summer season until the harvest period. Depending on climate conditions, B. oleae produce from 2 to 7 generations during the favourable season, although this fly can reproduce also during winter in mild climates 8 . The olive fruit fly is considered the key pest of olive crop (Olea europea L.), causing great qualitative and quantitative yield loses, as well as premature fruit drop. The presence of ovipositional puncture and/or active infestation can decrease or even nullify the value of table olives and seriously reduce oil yield and quality 9,10 . Furthermore, the olive frui...

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Olive cultivar and maturation process on the oviposition preference ofBactrocera oleae(Rossi) (Diptera: Tephritidae)

Cited by 17 publications

References 30 publications

The predatory bug Orius strigicollis shows a preference for egg-laying sites based on plant topography

The predatory bug Orius strigicollis shows a preference for egg-laying sites based on plant topography

Determination of volatile substances in olives and their effect on reproduction of the olive fruit fly

Olive fruit volatiles route intraspecific interactions and chemotaxis in Bactrocera oleae (Rossi) (Diptera: Tephritidae) females

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