Dataset Information

Essential Oils: Useful Tools in Storage-Pest Management.

ABSTRACT: This study aimed to verify the level of repellent and mortality effect of two chemical substances (DEET and 2-undecanone) and seven essential oils (EOs), Allium sativum, Artemisia annua, Ocimum basilicum, Lavandula angustifolia, Eucalyptus globulus, Pinus sylvestris, and Curcuma longa. The storage pests Tribolium confusum, Tenebrio molitor, and Acanthoscelides obtectus were exposed to various concentrations in an olfactometer-and-mortality test. The effects were recorded 24-48-72 h after the treatments were applied. A. sativum, E. globulus, and L. augustifolia were found to have significant repellence effects. A substantial lethal effect was observed for A. sativum, E. globulus, and O. basilicum. We also found that even if the most efficient EOs were diluted to low concentrations, they still produced repellent and mortality effects. The presented results indicate that A. sativum and O. basilicum were the most effective against T. confusum and T. molitor; simultaneously, L. angustifolia and C. longa showed high activity against A. obtectus. All of these efficient EOs could be applied as effective bio-control agents in various stored conditions.

SUBMITTER: Cagan L

PROVIDER: S-EPMC9692832 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Essential Oils: Useful Tools in Storage-Pest Management.

Cagáň Ľudovít Ľ Apacsová Fusková Miroslava M Hlávková Daniela D Skoková Habuštová Oxana O

Plants (Basel, Switzerland) 20221113 22

This study aimed to verify the level of repellent and mortality effect of two chemical substances (DEET and 2-undecanone) and seven essential oils (EOs), Allium sativum, Artemisia annua, Ocimum basilicum, Lavandula angustifolia, Eucalyptus globulus, Pinus sylvestris, and Curcuma longa. The storage pests Tribolium confusum, Tenebrio molitor, and Acanthoscelides obtectus were exposed to various concentrations in an olfactometer- ...[more]

PMID: 36432806

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Project description:BackgroundDiachasmimorpha longicaudata (Hymenoptera: Braconidae) is a solitary parasitoid of Tephritidae (Diptera) fruit flies of economic importance currently being mass-reared in bio-factories and successfully used worldwide. A peculiar biological aspect of Hymenoptera is its haplo-diploid life cycle, where females (diploid) develop from fertilized eggs and males (haploid) from unfertilized eggs. Diploid males were described in many species and recently evidenced in D. longicaudata by mean of inbreeding studies. Sex determination in this parasitoid is based on the Complementary Sex Determination (CSD) system, with alleles from at least one locus involved in early steps of this pathway. Since limited information is available about genetics of this parasitoid species, a deeper analysis on D. longicaudata's genomics is required to provide molecular tools for achieving a more cost effective production under artificial rearing conditions.ResultsWe report here the first transcriptome analysis of male-larvae, adult females and adult males of D. longicaudata using 454-pyrosequencing. A total of 469766 reads were analyzed and 8483 high-quality isotigs were assembled. After functional annotation, a total of 51686 unigenes were produced, from which, 7021 isotigs and 20227 singletons had at least one BLAST hit against the NCBI non-redundant protein database. A preliminary comparison of adult female and male evidenced that 98 transcripts showed differential expression profiles, with at least a 10-fold difference. Among the functionally annotated transcripts we detected four sequences potentially involved in sex determination and three homologues to two known genes involved in the sex determination cascade. Finally, a total of 4674SimpleSequence Repeats (SSRs) were in silico identified and characterized.ConclusionThe information obtained here will significantly contribute to the development of D. longicaudata functional genomics, genetics and population-based genome studies. Thousands of new microsatellite markers were identified as toolkits for population genetics analysis. The transcriptome characterized here is the starting point to elucidate the molecular bases of the sex determination mechanism in this species.

Project description:Essential oils application as natural preservatives is challenging owning to low solubility and stability to harsh conditions, while incorporation of essential oils into nanoemulsion systems can effectively improve these issues. Therefore, the nanoemulsion of ajwain (C. copticum) and cardamom essential oils were fabricated through self-emulsification technique and evaluated their size, ζ-potential, antioxidative and antibacterial activities. The effect of double nanomulsion on the textural and sensorial properties of Mortadella sausage was also examined under chilling temperature (4 °C). Our goal was to improve the chilling storage of Mortadella sausage by using ajwain and cardamom nanoemulsion as natural preservative. By increasing the ajwain essential oil in the nanoemulsion, the protein and moisture of sausage increased, while the fat content decreased (17 %). Furthermore, nanoemulsion of ajwain and cardamom essential oils showed particle size less than 100 nm and PDI<0.5 revealing the stability of nanoemulsions. Moreover, double nanoemulsions exhibited higher antibacterial activity against S. aureus and IC50 DPPH value (107 ppm). The nanoemulsion had a greater effect on the textural properties of Mortadella, reduction in hardness (∼5300 g), and chewiness (∼2500 g mm). Ajwain/cardamom nanoemulsion also increased the sensory properties, particularly taste and acceptance of the Mortadella. Consequently, Ajwain/cardamom nanoemulsion not only improve the storage of mortadella sausage at chilling temperature due to their antioxidant and antimicrobial properties, but also has a positive effect on the red color and textural properties created a special herbal aroma, taste and odor in the Mortadella samples, which ultimately contributed to the customer-friendly product. The appropriate dose of these nanoemulsion can develop meat products at lowest amount of nitrite in Mortadella sausage formulations, although, further research should be conducted on the mechanism of action AEO/CEO nanoemulsion concerning appearance and nitrite reduction in the meat products.

Dataset Information

Essential Oils: Useful Tools in Storage-Pest Management.

Publications

Essential Oils: Useful Tools in Storage-Pest Management.

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