THE ESSENTIAL OIL EXTRACTED FROM Thymus kotschyanus BOISS. &amp; HOHEN AS A NATURAL SUBSTANCE FOR MANAGEMENT OF THE LESSER GRAIN BORER, Rhyzopertha dominica F.

Ebadollahi, Asgar

doi:10.17707/agricultforest.64.4.06

Cited by 3 publications

(4 citation statements)

References 20 publications

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“…The negative signs were also showed the diminishing effect of the variables on the insect mortality. Further, optimization of the fumigant toxicity revealed that a concentration of 24.62 μl/l and 57.98 h-exposure time was sufficient to kill 50% of tested insect population (Ebadollahi, 2018). In other study, modeling and optimization of the insecticidal activities of the essential oil extracted from Teucrium polium L. against T. castaneum was assessed by RSM.…”

Section: Resultsmentioning

confidence: 99%

“…Regarding the fumigant toxicity of the essential oil of Thymus kotschyanus Boiss. & Hohen against R. dominica (Ebadollahi, 2018), and based on the high coefficient of variation value (8.02%), it was find that the presented model "52.08 + 3.49B + 22.84A -1.72AB -2.06A 2 + 3.73AB 2 -5.60A 3 " was the best for estimating the effects of independent variables (concentration (A) and time (B)) on the insect pest mortality. The negative signs were also showed the diminishing effect of the variables on the insect mortality.…”

Section: Resultsmentioning

confidence: 99%

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Modeling of the toxicity of Eucalyptus globulus Labill essential oil against red flour beetle, Tribolium castaneum Herbst

Ebadollahi¹,

Taghinezhad²

2021

jasem

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Although the application of synthetic chemicals is the main method in the management of insect pests, their overuse has led to public concerns about environmental pollution, threats to human health, and acute and chronic toxicity on non-target organisms. Plant essential oils have introduced as healthy, available, and effective alternatives to detrimental chemicals in recent years. Further, it is necessary to predict the exact amount of required pesticide to save costs and determine the optimal conditions for achievement to the best outcomes. Accordingly, the toxicity of Eucalyptus globulus Labill essential oil against the adults of a cosmopolitan pest Tribolium castaneum Herbst (red flour beetle) along with its modeling and optimization was assessed using Response Surface Methodology (RSM). The coefficients of the essential oil concentration and time as independent variables are positive, showing their increase results in the augmentation of insect pest mortality. E. globulus essential oil showed prospective concentration-time dependent fumigant toxicity against T. castaneum. A quadratic polynomial equation was achieved for the toxicity of E. globulus essential oil using multiple regression analysis: 7.33413 + 0.20191A + 0.47313B + 4.64054E-003AB + 0.016349B2, in which A and B are the exposure time and essential oil concentration. The accuracy of the introduced model was approved through the analysis of variance. Results of the optimization indicated that 45.50 μl/l of essential oil and 72.00 h-exposure time would be adequate to achieve 92.45% mortality of T. castaneum. According to the results of current study, E. globulus essential oil has high potential in the management of T. castaneum and the Response Surface Methodology (RSM) is a suitable method to the optimization and modelling of this bio-effect.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Modeling of the toxicity of Eucalyptus globulus Labill essential oil against red flour beetle, Tribolium castaneum Herbst

Ebadollahi¹,

Taghinezhad²

2021

jasem

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“…In another work on the essential oil of Thymus kotschyanus Boiss. & Hohen, the optimized condition for 50% mortality against R. dominica adults was 24.62 µL/L and a 57.98-h exposure time [54]. Based on the above-mentioned results, the essential oil of T. kotschyanus was more toxic than the T. vulgaris oil.…”

Section: Methyl Eugenolmentioning

confidence: 91%

Susceptibility of Tribolium castaneum (Coleoptera: Tenebrionidae) to the Fumigation of Two Essential Satureja Oils: Optimization and Modeling

et al. 2021

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Due to the numerous side effects of synthetic pesticides, including environmental pollution, threats to human health, harmful effects on non-target organisms and pest resistance, the use of alternative healthy, available and efficient agents in pest management strategies is necessary. In this paper, the susceptibility of the cosmopolitan, polyphagous, stored-product pest Tribolium castaneum (red flour beetle) to the fumigation of the essential oils of two important medicinal and food additive plants, Satureja hortensis and S. intermedia, was investigated. The insecticidal properties of the essential oils were modeled and optimized using response surface methodology. It was found that a maximum significant mortality of 94.72% and 92.97% could be achieved within 72 h with the applications of 55.15 µL/L of S. hortensis (with the linear model) and 58.82 µL/L of S. intermedia (with the quadratic model), respectively. There were insecticidal terpenes and phenylpropanoids in both essential oils, including thymol (50.8%), carvacrol (11.2%) and p-cymene (13.4%), in the S. intermedia and estragole (68.0%) and methyl eugenol (5.6%) in the S. hortensis. It was suggested that the essential oils of S. hortensis and S. intermedia could be offered as promising pesticidal agents against T. castaneum for further studies in the management of such pests instead of detrimental synthetic pesticides.

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“…vulgaris, genetically, morphologically and phytochemically has a very high diversity (Nielsen et al, 2017). Phytochemical constituents of thyme mainly consist of monoterpene, sesquiterpene and phenolic compounds (Hosseini et al, 2015;Ebadollahi., 2018). Previous research shows that essential oil compositions in thyme mainly consist of thymol, carvacrol, p-cymene and c-terpinene, and their quantity changes when affected by environmental stresses (Khalil et al, 2018;Mohammadi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

IMPROVEMENT OF YIELD AND PHYTOCHEMICAL COMPOUNDS OF Thymus vulgaris THROUGH FOLIAR APPLICATION OF SALICYLIC ACID UNDER WATER STRESS

Mohammadi¹,

Nikjoyan²,

Hazrati³

et al. 2020

AgricultForest

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Thymus vulgaris is an important medicinal plant across the world that has been grown in Iran since ancient times. To study the effect of foliar application of salicylic acid (SA) on the yield and phytochemical compositions of T. vulgaris, an experiment was conducted in Qazvin in 2017. A factorial experiment based on a randomised complete block design was conducted with three replications. Treatments of SA (0, 100, 150 and 200 mg/L) were applied from the period before flowering until the early stages of flowering under well-watered and withholding irrigation conditions. The results showed that SA had a significant effect on the yield and phytochemical compositions of T. vulgaris under both irrigation regimes. SA foliar application led to an increase in total dry matter. The highest total dry matter (1958.83 kg ha-1) was obtained by applying 200 mg/LSA under normal irrigation. The effect of foliar application of SA on the essential oil content of T. vulgaris was influenced by the irrigation regime. The highest essential oil content (2.66%) was obtained by applying a foliar spray of 100 mg/LSA under withholding irrigation conditions. Thymol, carvacrol, p-cymene, linalool and γ-terpinene were identified as the main essential oil compounds. The highest thymol content was obtained by foliar application of 200 mg/LSA under withholding irrigation conditions. Our results demonstrate that foliar application of SA reduced the negative effect of water deficit on T. vulgaris and increased yield and thymol content. SA foliar application is a simple, eco-friendly and relatively commercially viable method of increasing yield and the synthesis of phytochemicals; therefore, it may be used to improve the dry matter and quality of the essential oils of thyme plants.

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THE ESSENTIAL OIL EXTRACTED FROM Thymus kotschyanus BOISS. & HOHEN AS A NATURAL SUBSTANCE FOR MANAGEMENT OF THE LESSER GRAIN BORER, Rhyzopertha dominica F.

Cited by 3 publications

References 20 publications

Modeling of the toxicity of Eucalyptus globulus Labill essential oil against red flour beetle, Tribolium castaneum Herbst

Modeling of the toxicity of Eucalyptus globulus Labill essential oil against red flour beetle, Tribolium castaneum Herbst

Susceptibility of Tribolium castaneum (Coleoptera: Tenebrionidae) to the Fumigation of Two Essential Satureja Oils: Optimization and Modeling

IMPROVEMENT OF YIELD AND PHYTOCHEMICAL COMPOUNDS OF Thymus vulgaris THROUGH FOLIAR APPLICATION OF SALICYLIC ACID UNDER WATER STRESS

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