Functional Diversity of Infochemicals in Agri-Ecological Networks

Jayanthi, P. D. Kamala; Thimmappa, Raghava; Kempraj, Vivek

doi:10.1007/978-981-15-0794-6_10

Cited by 4 publications

(2 citation statements)

References 127 publications

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“…Our results established that D. longicaudata could readily differentiate B. dorsalis infested fruit volatiles from healthy ones, highlighting the dependency of these parasitic wasps on herbivore feeding induced fruit volatiles (HIPVs). Several studies in the past have reported that the parasitoids of phytophagous insects utilize herbivore induced plant volatiles (HIPVs) to track their hosts (Kamala Jayanthi et al 2020). Earlier studies also indicated that fermentation cues emanating from the decaying or host infested fruit attract the parasitic wasps, D. longicaudata (Greany et al 1977, Carrasco et al 2005, Segura et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Herbivore induced fruit volatiles guide the solitary tephritid endoparasitoid Diachasmimorpha longicaudata (Hymenoptera: Braconidae) in selecting an oviposition substrate

Jayanthi

Parepally

Thimmappa

et al. 2023

Environmental Entomology

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Oviposition in a generalist parasitoid is a complex process that involves interactions among its host, host plant, and spatiotemporal environment. Our study was aimed at exploring the ability of a generalist parasitic wasp, Diachasmimorpha longicaudata (Ashmead) (Hymenoptera: Braconidae), in perceiving odor cues from its host insect [Oriental fruit fly Bactrocera dorsalis (Hendel, Diptera: Tephritidae)] in infested mango fruits. A series of experiments involving behavioral and electrophysiological studies suggest that D. longicaudata is able to distinguish host infested fruit volatiles from uninfested. Additionally, we found that D. longicaudata can distinguish between high and low-level infestations using specific cues emanating from fruits. Coupled gas chromatography-electroantennographic detection (GC-EAD) and gas chromatography-mass spectrometry (GC-MS) analysis of infested mango fruit head space volatiles identified compounds such as ethyl butanoate, ethyl 3-hydroxybutyrate, β-myrcene, trans-β-ocimene, allo-ocimene, ethyl octanoate, ethyl-α-toulate, β-elemene, β-caryophyllene, humulene, caryophyllene oxide, ethyl dodecanoate, ethyl hexadecanoate, 2-furancarboxylic acid, 3-hydroxy-2-methyl-4-pyrone, and phenethyl alcohol emanated from three different host treatments with different levels of larval infestation which elicited antennal responses in D. longicaudata. We suggest that these cues might play a significant role in attracting D. longicaudata in the field.

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Section: Discussionmentioning

confidence: 99%

Herbivore induced fruit volatiles guide the solitary tephritid endoparasitoid Diachasmimorpha longicaudata (Hymenoptera: Braconidae) in selecting an oviposition substrate

Jayanthi

Parepally

Thimmappa

et al. 2023

Environmental Entomology

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“…On the other hand, stimuli that derive from the host itself (insect host) are less detectable at longer distances but more reliable in close vicinity, e.g., during host location (Vet et al, 1991). During host finding, hymenopteran parasitoids highly depend on chemical cues, so-called infochemicals or semiochemicals, mostly deriving from the host plants (i.e., cues that may serve as synomones) and/or their insect hosts (i.e., cues that may serve as host kairomones) (Vet and Dicke, 1992;Godfray, 1994;Jayanthi et al, 2020;Ayelo et al, 2021). Infochemicals that mediate the communication between different species are characterized as (a) synomones when it is beneficial for both the emitter and the receiver (e.g., plant and natural enemies of pests) and (b) kairomones when it is beneficial for the receiver and detrimental for the emitter (e.g., natural enemies of pests and pests) (Vet and Dicke, 1992).…”

Section: Introductionmentioning

confidence: 99%

Chemical cues involved in the host foraging behavior of Psyttalia concolor wasps to locate the olive fruit fly Bactrocera oleae

Bogka,

Anastasaki,

Milonas

et al. 2023

Front. Ecol. Evol.

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Foraging parasitoids rely on infochemicals, derived from the habitat, host plant and/or host insect itself. Here, we studied the olive fruit fly Bactrocera oleae (Rossi) (Diptera: Tephritidae), a major pest in olive agroecosystem and its larval parasitoid, Psyttalia concolor (Szépligeti) (Hymenoptera: Braconidae), a well-established and abundant wasp in Crete. To improve parasitoid’s efficiency as biological control agent, more knowledge on its host location behavior is required. The aim of this study was to investigate the role of oviposition- (OIPVs) and herbivore-induced plant volatiles (HIPVs) emitted by olive trees upon infestation by B. oleae as well as cues emitted by B. oleae, e.g., pheromones, therein. We conducted two-choice bioassays to test the preference of P. concolor to different olfactory stimuli. Moreover, we collected headspace volatiles from olive fruits and branches to investigate whether egg or larval infestation changes volatile emissions locally or/and systemically. We found that P. concolor wasps showed a strong preference to volatiles of B. oleae larval-infested fruits (HIPVs) compared to clean air, non-infested, egg-infested, and mechanical-damaged fruits. But they were not able to discriminate between volatiles of non-infested and larval-infested branches. In addition, the wasps were attracted to cues emitted from the virgin and mated B. oleae females. They were neither attracted to cues emitted by the virgin and mated males nor to the olive fruits with or without the cues of the oviposition marking of the B. oleae. We found important qualitative differences in volatile profiles of egg- and larval-infested fruits: nineteen volatile compounds were only detected in infested fruits, such as the terpenoids (E)-β-ocimene and (E,E)-α-farnesene. Moreover, volatile analysis showed that olives change volatile emissions locally and systemically in response to larval infestation. Our results suggest that both HIPVs and host cues play an important role to P. concolor during host location. Further knowledge on the chemical compounds utilized by the parasitoid to locate infested fruits could help application in olive orchards and to improve the control of the olive fruit fly by natural enemies.

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Behavioural response of specific larval endoparasitoid, Apanteles machaeralis (Wilkinson) to volatile cues from its host insect, Diaphania indica (Saunders) and the host plant (Cucumis sativus L.)

Venugopal

Jayanthi

Kumar

et al. 2020

Journal of Biological Control

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Functional Diversity of Infochemicals in Agri-Ecological Networks

Cited by 4 publications

References 127 publications

Herbivore induced fruit volatiles guide the solitary tephritid endoparasitoid Diachasmimorpha longicaudata (Hymenoptera: Braconidae) in selecting an oviposition substrate

Herbivore induced fruit volatiles guide the solitary tephritid endoparasitoid Diachasmimorpha longicaudata (Hymenoptera: Braconidae) in selecting an oviposition substrate

Chemical cues involved in the host foraging behavior of Psyttalia concolor wasps to locate the olive fruit fly Bactrocera oleae

Behavioural response of specific larval endoparasitoid, Apanteles machaeralis (Wilkinson) to volatile cues from its host insect, Diaphania indica (Saunders) and the host plant (Cucumis sativus L.)

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