The impact of different plant extracts on biological parameters of Housefly [Musca domestica (Diptera: Muscidae)]: Implications for Management

Background:Plant extracts are important products in the world and have been widely used for isolation of important biologically active products. Because of their significant environmental impact, extensive research has been explored to determine the antimicrobial activity of plant extracts.Methods:Acetone extracts of the bark and leaf of Cupressus sempervirens and Juniperus phoenicea, collected from three different altitudes (125, 391, and 851 m high of sea level) at Al- Jabel Al-Akhdar area, Libya were obtained and analyzed by GC/MS. The antimicrobial activity of the extracts was further evaluated against plant bacteria Rhizobium radiobacter, Erwinia carotovora, Rhodococcus fascians and Ralstonia solanacearum and fungus Botrytis cinerea.Results:The impact of the altitude from the sea level on the quantity and chemical constituents of the extracts was investigated. The yield was largely dependent on tree species and the highest yield (6.50%) was obtained with C. sempervirens L bark of altitude III (851 m of the sea level), while the lowest (1.17%) was obtained with the leaf extract of C. sempervirens L from altitude I (125 m). The chemical composition analyzed by GC/MS confirmed that the leaf extracts of C. sempervirens and J. phoenicea contained a complex mixture of monoterpene hydrocarbons, sesquiterpenes, diterpenes, diterpenoids, terpenophenolic, steroids and phthalates. However, the bark extracts of both trees contained a mixture of sesquiterpenes, diterpenes, diterpenoids, terpenophenolics, phthalates, retinol and steroids. These constituents revealed some variability among the extracts displaying the highest interesting chemotype of totarol (terpenophenolic) in all extracts (14.63-78.19% of the total extract). The extracts displayed a noteworthy antifungal potency with varying degrees of inhibition of growth with EC50 values ranged from 78.50 to 206.90 mg/L. The extracts obtained from the leaves of C. sempervirens showed that the highest inhibitory activity was obtained with the extract of altitude II (391 m) with MIC 565, 510, 380 and 710 mg/L against E. carotovora, R. fascians, and R. radiobacter and R. solanacearum, respectively.Conclusion:Based on antimicrobial activity, raw plant extracts can be a cost-effective way to protect crops from microbial pathogens. Because plant extracts contain several antimicrobial compounds, the development of resistant pathogens can be delayed.

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Evaluation activity of bacteria Bacillus thurengensis and different concentrations of plant extracts on adult of house fly Musca domestica

Journal of Physics Conference Series ◽

10.1088/1742-6596/1879/2/022019 ◽

2021 ◽

Vol 1879 (2) ◽

pp. 022019

Author(s):

Raghad Khalaf Al-Joboory ◽

Elaf Adnan

Keyword(s):

Musca Domestica ◽

Plant Extracts ◽

House Fly ◽

Evaluation Activity

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Application of Plant Extracts in Micropropagation and Cryopreservation of Bleeding Heart: An Ornamental-Medicinal Plant Species

Agriculture ◽

10.3390/agriculture11060542 ◽

2021 ◽

Vol 11 (6) ◽

pp. 542

Author(s):

Dariusz Kulus ◽

Natalia Miler

Keyword(s):

Tissue Culture ◽

Plant Growth ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Plant Extracts ◽

The Other ◽

White Gold ◽

Natural Extracts ◽

Other Hand ◽

The Impact

Lamprocapnos spectabilis (L.) Fukuhara (bleeding heart) is valued both in the horticultural and pharmaceutical markets. Despite its great popularity, information on the in vitro tissue culture technology in this species is limited. There is also little knowledge on the application of plant extracts in the tissue culture systems of plants other than orchids. The aim of this study is to compare the utility of traditional plant growth regulators (PGRs) and natural extracts—obtained from the coconut shreds, as well as oat, rice, and sesame seeds—in the micropropagation and cryopreservation of L. spectabilis ‘Gold Heart’ and ‘White Gold’. The biochemical analysis of extracts composition is also included. In the first experiment related to micropropagation via axillary buds activation, the single-node explants were cultured for a 10-week-long propagation cycle in the modified Murashige and Skoog medium fortified either with 1.11 µM benzyladenine (BA) and 1.23 µM indole-3-butritic acid (IBA) or with 10% (v/v) plant extracts. A PGRs- and extract-free control was also considered. In the cryopreservation experiment, the same 10% (v/v) extracts were added into the medium during a seven-day preculture in the encapsulation-vitrification cryopreservation protocol. It was found that the impact of natural additives was cultivar- and trait-specific. In the first experiment, the addition of coconut extract favoured the proliferation of shoots and propagation ratio in bleeding heart ‘Gold Heart’. Rice extract, on the other hand, promoted callus formation in ‘White Gold’ cultivar and was more effective in increasing the propagation ratio in this cultivar than the conventional plant growth regulators (4.1 and 2.6, respectively). Sesame extract suppressed the development of the explants in both cultivars analysed, probably due to the high content of polyphenols. As for the second experiment, the addition of plant extracts into the preculture medium did not increase the survival level of the cryopreserved shoot tips (sesame and oat extracts even decreased this parameter). On the other hand, coconut extract, abundant in simple sugars and endogenous cytokinins, stimulated a more intensive proliferation and growth of shoots after rewarming of samples. Analysing the synergistic effect of conventional plant growth regulators and natural extracts should be considered in future studies related to L. spectabilis.

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Influence of adult diet on biological parameters of the housefly, Musca domestica L. (Diptera: Muscidae)

The Journal of Basic and Applied Zoology ◽

10.1186/s41936-020-00181-z ◽

2020 ◽

Vol 81 (1) ◽

Author(s):

Haffizou Ganda ◽

Hermann A. Abihona ◽

Elisabeth T. Zannou-Boukari ◽

Marc Kenis ◽

Christophe A. A. M. Chrysostome ◽

...

Keyword(s):

Musca Domestica ◽

Biological Parameters ◽

Adult Diet

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Fourth Ageism: Real and Imaginary Old Age

Societies ◽

10.3390/soc11010012 ◽

2021 ◽

Vol 11 (1) ◽

pp. 12

Author(s):

Paul Higgs ◽

Chris Gilleard

Keyword(s):

Older People ◽

Long Term Care ◽

Social Representations ◽

Later Life ◽

Chronological Age ◽

Biological Parameters ◽

Term Care ◽

The Impact ◽

State Responses

This paper is concerned with the issue of ageism and its salience in current debates about the COVID-19 pandemic. In it, we address the question of how best to interpret the impact that the pandemic has had on the older population. While many feel angry at what they see as discriminatory lock-down practices confining older people to their homes, others are equally concerned by the failure of state responses to protect and preserve the health of older people, especially those receiving long-term care. This contrast in framing ageist responses to the pandemic, we suggest, arises from differing social representations of later life, reflecting the selective foregrounding of third versus fourth age imaginaries. Recognising the tension between social and biological parameters of ageing and its social categorisations, we suggest, may offer a more measured, as well as a less discriminatory, approach to addressing the selective use of chronological age as a line of demarcation within society.

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