Response of Trichogramma pretiosum females (Hymenoptera: Trichogrammatidae) to herbivore-induced Bt maize volatiles

Nascimento, P. T.; Fadini, Marcos Antonio Matiello; Rocha, M. S.; Souza, C. S. F.; Melo, Júlio Onésio Ferreira; Pinho, Renzo Garcia Von; Valicente, Fernando Hercos

doi:10.1007/s11829-020-09801-5

Cited by 6 publications

(5 citation statements)

References 63 publications

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“…Trichogramma wasps in general are widely used biocontrol agents (van Lenteren, 2012), whereas Trichogramma chilonis Ishii (Hymenoptera: Trichogrammatidae) is the most extensively used egg parasitoid to manage several lepidopteran pests (Karthikeyan et al, 2007; Saour, 2004; Uelese et al, 2014). Plant emitted VOCs are important chemical cues for these parasitoids to locate their host (Ali & Wright, 2020; Nascimento et al, 2021; Penaflor et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Heat stress affects potato's volatile emissions that mediate agronomically important trophic interactions

Munawar

Zhang

Zhong

et al. 2022

Plant Cell & Environment

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Potato, a cool-weather crop, emits volatile organic compounds (VOCs) which attract the specialist herbivore, Phthorimaea operculella, but also this herbivore's parasitic wasp, Trichogramma chilonis, an important biocontrol agent. What happens to this trophic system when heat stress challenges this agro-ecosystem? We studied how high temperature (HT) pre-treatments influence potato's VOC emissions and their subsequent effects on the preferences of insects, as evaluated in oviposition assays and Y-tube olfactometers. HT pre-stressed plants were less attractive to P. operculella adult moths, which were repelled by HT VOCs, but increased the recruitment of the parasitoid, T. chilonis, which were attracted. VOC emissions, including the most abundant constituent, ß-caryophyllene, were enhanced by HT treatments; some constituents elicited stronger behavioural responses than others.Transcripts of many genes in the biosynthetic pathways of these VOCs were significantly enhanced by HT treatment, suggesting increases in de novo biosynthesis. HT increased the plant's stomatal apertures, and exogenous applications of the hormone, ABA, known to suppress stomatal apertures, reduced leaf volatile emissions and affected the HT-altered plant attractions to both insects.From these results, we infer that HT stress affects this plant-insect interaction through its influence on VOC emissions, potentially decreasing herbivore ovipositions while increasing ovipositions of the parasitoid.

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Section: Introductionmentioning

confidence: 99%

“…Plant emitted VOCs are important chemical cues for these parasitoids to locate their host (Ali & Wright, 2020;Nascimento et al, 2021;Penaflor et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Heat stress affects potato's volatile emissions that mediate agronomically important trophic interactions

Munawar

Zhang

Zhong

et al. 2022

Plant Cell & Environment

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“…This method, developed by Arthur and Pawliszyn (1990), uses the principle of "green chemistry", since it requires a small amount of sample and does not use organic solvents, and can be used direct extraction mode or in headspace mode (HS-SPME). A great advantage of HS-SPME is its high capacity for adsorption of different classes of compounds, duo to the diversity of applicable coatings of SPME fibers, and it can be used to analyze complex matrices such as acerola, cagaita, callistemon, cambuí, beer, grumixama, pequi, corn, as well as spices such as black pepper and pink pepper, species which will be analyzed in this work (Franzin et al, 2020;Figueiredo et al, 2021;Srinivasan, 2008;García et al, 2019;Rodrigues et al, 2021;Silva et al, 2019;Silva et al, 2020;Oliveira Júnior, 2020;García et al, 2021;Pereira et al 2021;Ramos et al, 2020;Assunção et al, 2020;Ramos, et al, 2021a;Ramos et al, 2021b;Botti et al, 2019;Nascimento et al, 2021a;Nascimento et al, 2021b;Santos et al, 2020;Mariano et al, 2020;Rocha et al, 2019;Bueno et al, 2021;Mazzinghy et al, 2021;Viana et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Profile of the volatile organic compounds of pink pepper and black pepper

et al. 2021

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Black pepper (Piper nigrum L.) and pink pepper (Schinus terebinthifolius Raddi) are two plant-based spices, which despite having a common popular name, have a botanical family and distinct centers of origin. Its fruits are known worldwide in cuisine as condiments; in addition, the extraction of essential oil from these species is interesting from a pharmacological and industrial perspective. In this sense, the present study aimed to analyze the chemical profile of volatile organic compounds (VOC's) present in black pepper and pink pepper. The solid phase microextraction method in headspace mode (HS-SPME) was used, using the fiber, polydimethylsiloxane-divinylbenzene (PDMS/DVB) for the extraction of VOCs. In the extraction of volatile compounds, 2g of the seeds of each sample were used, previously ground in an analytical mill, and placed in a 20 ml headspace flask. The adsorption of the compounds was carried out at a temperature of 60ºC, for 20 minutes, with the exposed PDMS/DVB fiber, after extraction, the desorption was carried out in the gas chromatograph injector coupled to mass spectrometry (CG-MS), where the fiber was exposed for 5 minutes. The identification of VOCs was performed by comparing the mass spectra obtained with data from the NIST library. Thirty-six volatile organic compounds (VOCs) were identified and quantified among pink pepper and black pepper seed samples. Of which 16 were found in black pepper, and 20 in pink pepper. These compounds are divided into monoterpenes, sesquitepenes, and other classes such as alkaloids and sesquiterpenoids. The volatile organic compounds found in higher concentrations in black pepper were Carnegine with 36.32 %, beyerene (30.84%), alpha-gurjunene (6.10%) and 1R,4S,7S,11R-2, 2,4,8-Tetramethyltricyclo [5.3.1.0 (4.11)] undec-8-ene also with 6.10%. In pink pepper, the compounds with the highest concentrations were, phyllocladene (36.16%), 3-carene (12.49%), and 1R,4S,7S,11R-2,2,4,8-tetramethyltricyclo [ 5.3.1.0 (4.11)] undec-8-ene (12.43%).

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“…The efficacy of this technology is high against some of these species, and Bt resistance is a frequent concern in such a scenario receiving considerable attention (Santos‐Amaya et al., 2017; Siegfried & Jurat‐Fuentes, 2016; Sorgatto et al., 2015). Bt non‐target species also received attention, and negligible effects prevail in different regions (Duan et al., 2008; Lima et al., 2013; Nascimento et al., 2021; Sujii et al., 2013). However, studies of Bt cotton impact in arthropod assemblages and communities are not as frequent, but again usually report negligible effects on soil (Krogh et al., 2020; Tian et al., 2020)‐ and plant‐associated species (Marvier et al., 2007; Sisterson et al., 2004; Sujii et al., 2013; Torres & Ruberson, 2005), despite their limitations akin to those of pesticide impact assessments (Guedes et al., 2016, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The reported studies on the impact of Bt cotton in arthropod assemblages either center attention on few species (Duan et al., 2008; Nascimento et al., 2021) or use general (descriptive) diversity index and/or focus on lower hierarchical taxonomic levels limiting the study resolution (Ávila‐Rodríguez et al., 2019; Sisterson et al., 2004; Sujii et al., 2013). Some studies did use more robust and high‐resolution approaches, including multivariate techniques for the ordination and recognition of the impact on species assemblages (Torres & Ruberson, 2005).…”

Section: Introductionmentioning

confidence: 99%

Arthropod food webs associated with cotton: Does Bt cotton mediate community stress?

Luz

Zuim

Oliveira

et al. 2021

J Applied Entomology

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The advent of genetically modified crops expressing insecticidal proteins of the bacterium Bacillus thuringiensis (Bt) revolutionized the management of insect pest species. Nonetheless, such disruption does not come free from controversies and concerns. The quick spread of Bt resistance in targeted pest species is an example, and the impact in non‐targeted arthropod species is another. The former is a continuous focus of attention, while the latter faces knowledge gaps and methodological shortcomings particularly when arthropod communities are concerned. If Bt crops such as cotton are aimed at drastically reducing a key community component, such as targeted caterpillars in the Neotropical region, a significant community‐level impact is expected and deserves assessment. However, the subject is neglected with existing studies focusing on arthropod assemblages or low‐level taxa compromising their resolution. Thus, food web analysis was used here to assess the short‐term impact of Bt cotton on the associated arthropod community in a Neotropical scenario. Bt cotton and related non‐Bt cotton were cultivated for two years, and the arthropods were sampled using sweep net and whole plant collections throughout the cotton phenological cycle. The gathered data were used to build (plant–consumer–predator) trivariate networks using food web analysis. Thirty‐six arthropod species were sampled with the prevalence of whiteflies, cotton aphids, boll weevils and green leafhoppers, the main pest species in the region. Cotton genotype and cultivation year significantly affected the abundance and diversity of the associated arthropod assemblage (Fapp ≥ 2.86, p < 0.01). However, the Bt cotton‐associated food webs were similar to those of the non‐Bt cotton, indicating no significant impact of this technology on arthropod food webs. This result would be welcome, if it not indicating that Bt cotton did not provide a significant control of the main target pest species of the crop raising questions on the usefulness of the technology in the area.

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Response of Trichogramma pretiosum females (Hymenoptera: Trichogrammatidae) to herbivore-induced Bt maize volatiles

Cited by 6 publications

References 63 publications

Heat stress affects potato's volatile emissions that mediate agronomically important trophic interactions

Heat stress affects potato's volatile emissions that mediate agronomically important trophic interactions

Profile of the volatile organic compounds of pink pepper and black pepper

Arthropod food webs associated with cotton: Does Bt cotton mediate community stress?

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