Biological controls investigated to aid management of olive fruit fly in California

Daane, Kent M.; Johnson, Marshall W.; Pickett, Charles H.; Sime, Karen R.; Wang, Xingeng; Nadel, Hannah; Andrews, J.W.; Hoelmer, Kim A.

doi:10.3733/ca.v065n01p21

Cited by 30 publications

(23 citation statements)

References 44 publications

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“…To assess whether this variation between two figitid species that differ in their host range similarly exists in other parasitoid taxa, we compared here the venom composition of two braconid wasps, Psyttalia lounsburyi and P. concolor (Hymenoptera, Braconidae, Opiinae) that belong to the same complex of species8. Both Psyttalia species are used as biological control agents of the olive fruit fly Bactrocera oleae 9 and they differ in their host range. P. lounsburyi is specialized on B. oleae 9 whereas P. concolor successfully develops in B. oleae and at least 13 other fruit fly species10.…”

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“…Both Psyttalia species are used as biological control agents of the olive fruit fly Bactrocera oleae 9 and they differ in their host range. P. lounsburyi is specialized on B. oleae 9 whereas P. concolor successfully develops in B. oleae and at least 13 other fruit fly species10. Comparison of P. lounsburyi and P. concolor venom was performed using a combined transcriptomic and proteomic approach, and it was extended at the intraspecific level using two geographically distant African strains of P. lounsburyi (South Africa and Kenya).…”

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Comparative venomics of Psyttalia lounsburyi and P. concolor, two olive fruit fly parasitoids: a hypothetical role for a GH1 β-glucosidase

Mathe‐Hubert

Colinet

Deleury

et al. 2016

Sci Rep

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Venom composition of parasitoid wasps attracts increasing interest – notably molecules ensuring parasitism success on arthropod pests – but its variation within and among taxa is not yet understood. We have identified here the main venom proteins of two braconid wasps, Psyttalia lounsburyi (two strains from South Africa and Kenya) and P. concolor, olive fruit fly parasitoids that differ in host range. Among the shared abundant proteins, we found a GH1 β-glucosidase and a family of leucine-rich repeat (LRR) proteins. Olive is extremely rich in glycoside compounds that are hydrolyzed by β-glucosidases into defensive toxic products in response to phytophagous insect attacks. Assuming that Psyttalia host larvae sequester ingested glycosides, the injected venom GH1 β-glucosidase could induce the release of toxic compounds, thus participating in parasitism success by weakening the host. Venom LRR proteins are similar to truncated Toll-like receptors and may possibly scavenge the host immunity. The abundance of one of these LRR proteins in the venom of only one of the two P. lounsburyi strains evidences intraspecific variation in venom composition. Altogether, venom intra- and inter-specific variation in Psyttalia spp. were much lower than previously reported in the Leptopilina genus (Figitidae), suggesting it might depend upon the parasitoid taxa.

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Comparative venomics of Psyttalia lounsburyi and P. concolor, two olive fruit fly parasitoids: a hypothetical role for a GH1 β-glucosidase

Mathe‐Hubert

Colinet

Deleury

et al. 2016

Sci Rep

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“…The olive fruit fly, Bactrocera oleae (Rossi) (Diptera: Tephritidae), is a direct pest of olives that was discovered in California in 1998 and has spread throughout the olive‐producing regions of this state (Rice, Phillips, Stewart‐Leslie, & Sibbett, ; Zalom, Van Steenwyk, Burrack, & Johnson, ). Because existing indigenous natural enemies do not adequately suppress fly populations (Kapaun, Nadel, Headrick, & Vredevoe, ), a classical biological control programme was initiated in 2000, and surveys for parasitoids were conducted in Africa (believed to be the origin of the fly) and Eurasia (Daane et al, ; Hoelmer, Kirk, & Pickett, ). Among the species collected, Psyttalia lounsburyi (Silvestri), a solitary larval endoparasitoid, proved to be highly specific to B. oleae and was approved for release in the USA as a classical biological agent (Copeland, White, Okumu, Machera, & Wharton, ; Daane et al, ; Mkize, Hoelmer, & Villet, ).…”

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Mass‐rearing optimization of the parasitoid Psyttalia lounsburyi for biological control of the olive fruit fly

Chardonnet¹,

Blanchet²,

Hurtrel³

et al. 2018

J Applied Entomology

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The olive fruit fly, Bactrocera oleae (Tephritidae), is a direct pest of olives that has invaded the Mediterranean Region and California. Psyttalia lounsburyi (Braconidae), a larval parasitoid from Africa, has been approved for release in the USA as a classical biological agent. However, it has been difficult to rear the parasitoid in the laboratory because it is multivoltine, and the host develops only in fresh olives, which are not available for most of the year. A method to rear the parasitoid on the factitious host, Mediterranean fruit fly (Ceratitis capitata) was developed, but it was not very efficient for producing large numbers of parasitoids needed for release. We developed a number of ways to improve the efficiency of rearing, including the frequency and duration of exposure for oviposition, optimizing the density of adult parasitoids, host age, as well as methods to quickly standardize the number of larvae exposed and to count emerging adult parasitoids. We significantly improved the number of progeny produced per female and the sex ratio of progeny. Thanks to these improvements, we produced in 2017 over 119,000 adults and shipped over 53,900 for release in California.

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“…The olive fruit fly (OLF) Bactrocera oleae (Rossi) (Diptera: Tephritidae) is the primary economic 37 pest in all olive growing regions of Europe, North Africa, the Middle East and, recently, California 38 and north-western Mexico (Rice, et al, 2003;Zygouridis, et al, 2009;Daane, et al, 2011;39 Papadopoulos, 2014). The development of long-term management practices for the fly, focused 40 on classical biological control and IPM strategies, has been investigated for over 80 years in the 41…”

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Response of Bactrocera oleae to different photoperiods and temperatures using a novel method for continuous laboratory rearing

Baratella¹,

Pucci

Paparatti

et al. 2017

Biological Control

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Biological controls investigated to aid management of olive fruit fly in California

Cited by 30 publications

References 44 publications

Comparative venomics of Psyttalia lounsburyi and P. concolor, two olive fruit fly parasitoids: a hypothetical role for a GH1 β-glucosidase

Comparative venomics of Psyttalia lounsburyi and P. concolor, two olive fruit fly parasitoids: a hypothetical role for a GH1 β-glucosidase

Mass‐rearing optimization of the parasitoid Psyttalia lounsburyi for biological control of the olive fruit fly

Response of Bactrocera oleae to different photoperiods and temperatures using a novel method for continuous laboratory rearing

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