Prolonged sublethal effects of essential oils from non-wood parts of nine conifers on key insect pests and vectors

Pavela, Roman; Maggi, Filippo; Mazzara, Eugenia; Torresi, Jacopo; Cianfaglione, Kevin; Benelli, Giovanni; Canale, Angelo

doi:10.1016/j.indcrop.2021.113590

Cited by 44 publications

(21 citation statements)

References 81 publications

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“…However, Pavela and co‐workers [34] found (+)‐enantiomers of α‐pinene and limonene (ca. 76 % ee and 83 % ee , respectively)in essential oil from twigs of Picea abies , collected in Abruzzo, Italy.…”

Section: Resultsmentioning

confidence: 99%

“…However, a more likely reason for the discrepancies is an error in assignment of chromatographic peaks of enantiomers. Pavela and co‐workers [34] carried out chirospecific GC analysis using β‐cyclodextrin as chiral selector and mentioned (+)‐α‐pinene and (+)‐limonene as the first‐eluting enantiomers under temperature programmed conditions (50 °C→220 °C/2 °C min –1 ). However, Yassaa and co‐workers had shown previously [36] that (−)‐α‐pinene and (−)‐limonene were eluted first (capillary GC, stationary phase with β‐cyclodextrin, temperature programming 50 °C→200 °C/2 °C min −1 ).…”

Section: Resultsmentioning

confidence: 99%

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Variations in Essential Oils from South Siberian Conifers of the Pinaceae Family: New Data towards Identification and Quality Control

Romanenko

Domrachev

Ткачев

2022

Chemistry & Biodiversity

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Conifer essential oils have been used for centuries in traditional medicine, and nowadays they are of special interest for official medicine, aromatherapy and perfumery. In the present work, comprehensive information is given on the composition of essential oils prepared from the twigs of the conifer trees of the pine family (Pinaceae): Abies sibirica Ledeb., Larix sibirica Ledeb., Picea obovata Ledeb., Pinus sibirica Du Tour, Pinus sylvestris L. A total of 50 samples of essential oils have been studied. The samples were prepared during vegetation stage in the time period 1998–2012 from the growing wild trees in the South part of the Western Siberia (Russian Federation) and neighboring territories of Republic of Kazakhstan within the area with geographical coordinates LAT 49.180012–57.908583 and LON 83.213217–91.258717 at elevation of 82–2070 m above sea level. All the essential oil samples were obtained from freshly collected plant raw material by steam distillation at atmospheric pressure in stainless steel apparatus, which had been specially designed for field research. All the chromatographic profiles were prepared from authentic samples whose voucher specimens are deposited at the Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences (NS). The following information for each sample is provided: (1) date and location of the plant raw material collecting, indicating administrative areas and the exact geographic coordinates; (2) yield of essential oil, (3) chemical composition of the essential oil sample based on GC/MS experiments using full mass‐spectra (EI, 70 eV) and linear retention indices of the components, (4) results of GC‐FID quantification based on internal standards and response factors, (5) enantiomeric composition of the main components based on GC×GC experiments using the 2nd column with cyclodextrin‐based chiral selector, (6) GC profile of the high‐boiling fractions indicating the characteristic sesquiterpenoids. Therefore, this study provides reliable information about the variability and true composition of the Siberian conifer oils, and the experimental data given can serve as reference chromatographic profiles of volatile substances to solve the problems of quality, authenticity and safety.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Variations in Essential Oils from South Siberian Conifers of the Pinaceae Family: New Data towards Identification and Quality Control

Romanenko

Domrachev

Ткачев

2022

Chemistry & Biodiversity

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“…Bean weevil females are more tolerant to monoterpenes and essential oils ( Regnault-Roger and Hamraoui, 1995 ; Papachristos and Stamopoulos, 2002 ; Papachristos et al, 2004 ; Lazarević et al, 2020 ), which is confirmed in our study with residual contact toxicity of thymol where we recorded higher median lethal concentration and lower initial mortality in females than males. In other insect species, females are usually more tolerant to plant-derived compounds ( Yeom et al, 2012 ; Theou et al, 2013 ; Jang et al, 2017 ; Park et al, 2017 ; Pavela et al, 2021 ). Sex differences depend on applied compounds and the method of application.…”

Section: Discussionmentioning

confidence: 99%

“… Jang et al (2017) detected higher tolerance of female Drosophila suzuki to topically applied citronellal, citronellol and isopulegol, but not after fumigant application. Only essential oils rich in α-pinene were more toxic to Musca domestica males ( Pavela et al, 2021 ). In the bean weevil, females were about 3.5 times more resistant to α-terpineol and only 1.2 times more resistant to α-pinene ( Papachristos et al, 2004 ).…”

Section: Discussionmentioning

confidence: 99%

Assessment of Sex-Specific Toxicity and Physiological Responses to Thymol in a Common Bean Pest Acanthoscelides obtectus Say

Lazarević

Jevremović²,

Kostić

et al. 2022

Front. Physiol.

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Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae: Bruchinae), is one of the most important pests of the common bean Phaseolus vulgaris L. Without appropriate management it may cause significant seed loss in storages. In search for means of environmentally safe and effective protection of beans we assessed biological activity of thymol, an oxygenated monoterpene present in essential oils of many aromatic plants. We studied contact toxicity of thymol on bean seeds and its effects on adult longevity and emergence in F1 generation. Furthermore, we determined acetylcholinesterase (AChE), superoxide dismutase (SOD), catalase (CAT), mixed-function oxidase (MFO), carboxylesterases (CarE) and glutathione S-transferase (GST) activities in response to 24 h exposure of beetles to sublethal and lethal thymol concentrations. Our results showed that thymol decreased adult survival, longevity and percentage of adult emergence. Higher median lethal concentration (LC50) was recorded in females indicating their higher tolerance comparing to males. Overall, activities of SOD, CAT and CarE increased at sublethal and MFO increased at both sublethal and lethal thymol concentrations. On the other hand, GST and AChE activities decreased along with the increase in thymol concentrations from sublethal (1/5 of LC50, 1/2 of LC50) to lethal (LC50). Enzyme responses to the presence of thymol on bean seed were sex-specific. In the control group females had lower CarE and higher SOD, CAT and GST activity than males. In treatment groups, females had much higher CAT activity and much lower CarE activity than males. Our results contribute to deeper understanding of physiological mechanisms underlying thymol toxicity and tolerance which should be taken into account in future formulation of a thymol-based insecticide.

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“…Knowledge of the biotoxicity of phytochemicals and their nanomaterials against non-target species is still quite rare. Many authors have found that phytochemicals and plant-mediated synthesized nanoparticles do not harm several non-target species that share the same ecological niche of the targeted pests (Benelli 2016;Benelli et al 2018;Pavela et al 2021a). However, most studies focus on acute assessments, while detailed information on sub-chronic and chronic evaluations is quite rare (Benelli et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Bioactivity and safety evaluations of Cupressus sempervirens essential oil, its nanoemulsion and main terpenes against Culex quinquefasciatus Say

Almadiy

Nenaah

2021

Environ Sci Pollut Res

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The essential oil (EO) of Cupressus sempervirens was obtained by hydrodistillation and analysed using gas chromatographyflame ionization detection (GC-FID) and gas chromatography-mass spectrometry (GC-MS). Two monoterpenes, α-pinene (49.1%) and δ-3-carene (21.4%), and one sesquiterpene hydrocarbon, α-cedrol (5.1%), were isolated as the EO major terpenes. An oil-in-water nanoemulsion (particle size 71.2 nm) was produced from the EO through a low-energy method. The EO, its nanoemulsion and its main constituents showed mosquitocidal and biochemical effects against Culex quinquefasciatus Say, the common vector of lymphatic filariasis parasites. All treatments showed dose-dependent bioactivity, and adults were more susceptible to the EO products than the larvae. The nanoemulsion showed superior activity, followed by the crude EO and α-cedrol. At 40 μg/ml, the nanoemulsion caused 100% larval mortality, while the EO and α-cedrol required twice this concentration to achieve the same larval mortality. The LC 50 values were 8. 4, 16.1, 15.1, 30.7 and 53.4 μg/ml at 24 h after exposure for the nanoemulsion, crude oil, α-cedrol, δ-3-carene and α-pinene, respectively. For adults, 20.0 μl/l nanoemulsion caused 100% mortality, while twice this concentration of the EO was required to achieve the same effect. The LC 50 's against adults ranged between 6.2 and 40.4 μl/l. EO products prominently repelled mosquitoes at concentrations between 0.75 and 6.0 μl/cm 2 . The EO products caused remarkable inhibition of Cx. quinquefasciatus acetylcholinesterase activity but were safer towards the non-target aquatic species Gambusia affinis. These results recommend the use of C. sempervirens EO, its nanoemulsion and main terpenes as natural tools to control Cx. quinquefasciatus.

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Prolonged sublethal effects of essential oils from non-wood parts of nine conifers on key insect pests and vectors

Cited by 44 publications

References 81 publications

Variations in Essential Oils from South Siberian Conifers of the Pinaceae Family: New Data towards Identification and Quality Control

Variations in Essential Oils from South Siberian Conifers of the Pinaceae Family: New Data towards Identification and Quality Control

Assessment of Sex-Specific Toxicity and Physiological Responses to Thymol in a Common Bean Pest Acanthoscelides obtectus Say

Bioactivity and safety evaluations of Cupressus sempervirens essential oil, its nanoemulsion and main terpenes against Culex quinquefasciatus Say

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