Geranium Essential Oil Research Articles

Enhancement of Rose Scented Geranium Plant Growth, Secondary Metabolites, and Essential Oil Components through Foliar Applications of Iron (Nano, Sulfur and Chelate) in Alkaline Soils

Iron (Fe) deficiency exists as a widespread nutritional disorder in alkaline and calcareous soils; therefore, Fe-enriching strategies may be used to overcome this issue. Field experiments were conducted with a randomized complete design with three replicates for evaluating the effectiveness of iron oxide nanoparticles (Fe-NPs) against traditional Fe compounds (sulfate or chelate), which have various shortcomings on Rose-scented geranium (RSG) herb in terms of plant growth, phytopharmaceuticales, essential oil (EO), and its constituents. Supplementation of Fe-sources considerably improved RSG plant growth and EO yield in the 1st and 2nd cut throughout the two seasons over non-treated control plants. A total of 11 compounds of RSG-EO were identified; the main constituents were citronellol, geraniol, and eugenol. The results indicate that EO composition was significantly affected by Fe-sources. Amendments of Fe-sources considerably augmented photosynthetic pigments, total carbohydrates, nitrogen, phosphorous, potassium, iron, manganese, zinc, phenols, flavonoids, and anthocyanin. Commonly, Fe-NPs with humic acid (Fe-NPs-HA) supplementation was superior to that of traditional sources. The highest values were recorded with spraying Fe-NPs-HA at 10 mg L−1 followed by 5 mg L−1, meanwhile, the lowest values were recorded in untreated control plants. Current findings support the effectiveness of nanoparticle treatment over Fe-sources for improving growth and yield while also being environmentally preferred in alkaline soil. These modifications possibly will be applicable to EO quality and its utilization in definite food and in medical applications.

INFLUENCE OF $PELARGONIUM~GRAVEOLENS$ L'HER. ON THE INDOOR AIR MYCOBIOTA

One of the most important problems is to reduce the level of indoor air contamination by micromycete. It is known that houseplants with high phytoncide activity have an antifungal effect. In order to reduce the level of contamination in the air of the office room, $Pelargonium~graveolens$ L'Her. plant and essential oil of Geranium were used. The results of the study showed that the level of air pollution with micromycetes was reduced 3 times when there was a $Pelargonium~graveolens$ plant in the room, and the air contamination is reduced 4 times when there is houseplant combined with Geranium essentiale oil.

From biosynthesis in plants to post-biosynthetic enzymatic conversion. Generation of odor-impact rose oxides from citronellol-rich essential oils

ABSTRACT Citronellol is a monoterpene alcohol biosynthesized by various plant species belonging to different families of Angiosperm. Bioinspired by the metabolism of Rosa sp., able to produce (–)-cis-rose oxide from citronellol, we have studied and optimized a laccase-catalyzed oxidation of (±)-, (R)-, and (S)-citronellol into rose oxide diastereomers in the presence of mediators. The reaction was found to be diastereomerically cis-selective but completely non-enantioselective. The laccase-mediator system was then applied on citronellol-containing essential oils such as lemongrass (Cymbopogon citratus) and geranium (Pelargonium graveolens) essential oils in order to modify their composition beyond the plant metabolism and increase their rose oxides content, thereby tuning their olfactory properties.

Antioxidation effect of alginate beads containing thyme, rosemary or geranium essential oils in lard and coconut oil

SummaryThe alginate beads encapsulated thyme (AT), rosemary (AR) and geranium (AG) essential oils (EOs) were prepared to inhibit lipid oxidation in lard and coconut oil. The result showed that beads dried in hot air oven (45 °C) encapsulated higher amount of EOs than drying by desiccation method. Sachets containing AT, AR and AG were applied in PET bottles containing lard and coconut oils and stored at 45 °C. The DPPH scavenging activities of AT, AR and AG were 85.39%, 78.26%, and 78.12%, respectively. During storage, released EOs reduced PV and TBARS of lard and coconut oil and did not affect their colour acceptability scores. From PV, FFA and TBARS, AT at 0.50 g exhibited the best results in terms of lipid oxidation inhibition, although encapsulation percentage and release were significantly lower than AG and AR. Porous in alginate beads could entrap lipid oxidation products, including volatile compounds and water vapour. Besides, the hydrophilic property of polymer matrix led to water absorption, which lower aw value. In week3, the odour acceptability scores of control lard failed, while those packed with AT, AR and AG were acceptable. Alginate beads containing EOs can be used to extend the storage life of lard and coconut oil.

Effects of Inhalation of Essential Oil From Pelargonium graveolens on the Autonomic Nervous System of Awake Mice

Autonomic nervous system disorders have many causes, and thus, no effective remedy for these disorders has been established. In this study, we conducted animal experiments with essential oil from Pelargonium graveolens (EOPG, geranium essential oil), which may regulate the autonomic nervous system. EOPG was administered to awake mice by inhalation. Heart rate variability (HRV) was analyzed from the pulse wave of the mice on an elevated platform, and the ratio of sympathetic to parasympathetic nerve activity was determined. The results showed that inhalation of EOPG did not affect the heart rate but made activity of the parasympathetic nervous system dominant. This effect was thought to be due to linalool, a component of EOPG that was transferred into the brain and body.

Antimicrobial Activity, Microstructure, Mechanical, and Barrier Properties of Cassava Starch Composite Films Supplemented With Geranium Essential Oil.

In this study, we prepared cassava starch-based films by the casting method. Afterwards, the effects of geranium essential oil (GEO) on the prepared films' physicochemical, morphology, and antibacterial properties were revealed. We found that the thickness and elongation at the break of cassava starch films increased with increasing GEO concentration (from 0.5, 1, and 2%). However, increasing GEO concentration decreased the water content, water vapor permeability, and tensile strength of the prepared films'. Further, the addition of GEO increased the surface roughness, opacity, and antibacterial properties of the prepared films. With the increase of GEO concentration, L* and a* of cassava starch film decreased, while b* and Δ E increased. This study provides a theory for cassava starch-based films as a biological packaging material.

Concerns with Male Infertility Induced by Exposure to Titanium Nanoparticles and the Supporting Impact of Pelargonium graveolens Essential Oil: Morphometric Records in Male-Wistar Rats.

Background: Due to the increased use of titanium dioxide nanoparticles (TiO2 NPs), the risks of their reprotoxic effect arise. This study anticipated examining the potential protective effects of GEO (geranium essential oil) components screened via GC/MS analysis against the reprotoxic impacts of TiO2 NPs on male rats. Methods: Thirty-two adult male rats were randomly assigned to four groups: control, GEO (75 mg/kg bwt/orally/day/60 days), TiO2 NPs (100 ppm/rat/IP/day/60 days), and TiO2 NPs + GEO. After 60 days, hormonal assay, semen appraisal, lipid peroxidation, antioxidant enzymes, testis and prostate morphometry, and the steroidogenesis-related genes’ mRNA expressions were assessed. Results: The TEM and DLS results demonstrated that synthesized TiO2 NPs are spherical with minimal aggregations polydispersed and varying in size from 50 to 100 nm. TiO2 NPs IP injection-induced sperm abnormalities decreased the percent of motile sperms in the sperm count, reduced sex hormone levels, altered the testicular oxidant/antioxidant status and mRNA expression of steroid-related genes, and induced architectural alterations in testicular, epididymal, and prostate gland tissues. GEO significantly rescued the TiO2 NPs-altered spermiogram, sex hormones, and antioxidant capacity, restored the tissue architectures, and enhanced steroidogenesis-related gene mRNA expression. Conclusions: These findings may significantly contribute to developing combinatorial treatments for infertility associated with various environmental and industrial xenobiotic exposures.

Age-Defying and Photoprotective Potential of Geranium/Calendula Essential Oil Encapsulated Vesicular Cream on Biochemical Parameters against UVB Radiation Induced Skin Aging in Rat

UVB irradiation promotes the production of reactive oxygen species, which can lead to an increase in oxidative stress in the cell and the generation of toxic components, resulting in photoaging. Essential oils (EOs) are well-known in the cosmetics sector for their beneficial effects, as they have a wide range of biological activities. Considering this fact, the current study investigates the photoprotective potential of geranium essential oil (GEO)/calendula essential oil (CEO) encapsulated vesicular cream on the biochemical parameters of the skin of albino rats exposed to UVB radiation. After 30 days of treatment with cream formulations and UVB irradiation, the skin tissue was assayed for several biochemical parameters and histopathology analysis. The results of biochemical study revealed that, in comparison to non-vesicular creams, vesicular cream formulations were able to protect the endogenous skin natural antioxidant system by maintaining superoxide dismutase, catalase, total protein, ascorbic acid, and hydroxyproline levels and by decreasing malondialdehyde levels in the skin after UVB exposure. Changes in various cellular structures along with the change in the epidermis and dermis of the skin after UVB exposure in the treated group were observed by a histopathology of skin tissue and compared to the non-treated group, which revealed the skin damaging effect of UVB radiation and the protective effect of vesicular creams. The results suggest that the GEO/CEO-encapsulated vesicular creams have the potential to protect the skin against harmful UVB radiation by maintaining the natural antioxidant defence mechanism of the skin. In conclusion, this research presents novel herbal cosmetic formulations with improved antioxidant capacity and photoprotective potential that may help to slow down the skin aging process.

Comparing the Effect of Aromatherapy With Geranium and Lemon Essential Oil on Situational Anxiety and Physiological Indices of Patients After Coronary Angioplasty

Objective: Postoperative anxiety, such as coronary artery bypass graft surgery, is one of the most common stressors in this group of patients, which can endanger their physical and mental health. This study aimed to compare the effect of aromatherapy with geranium and lemon essential oil on situational anxiety and physiological indices of patients after coronary angioplasty. Methods: In this placebo-controlled randomized clinical trial study, 150 patients undergoing coronary angioplasty were selected by convenience sampling method and obtained their informed written consent. They were randomly divided into three groups: geranium essential oil, lemon essential oil, and the control group. The patients’ anxiety was measured using a situational anxiety questionnaire before and after the intervention. Also, the physiological indices of patients were measured before and after the intervention. Data analysis was performed at descriptive and inferential levels (analysis of covariance and the Kruskal-Wallis test) in SPSS version 22. Results: The effect of aromatherapy with geranium essential oil on reducing anxiety (35.94±8.64) in patients was significantly greater than aromatherapy with lemon essential oil (44.16±8.72) and almond oil (41.14±5.08) (P<0.001). There was no significant difference between the effect of aromatherapy with almond oil (41.14±5.08) and lemon essential oil (44.16±8.72) in reducing patients’ anxiety (P = 0.241). Also, the effect of aromatherapy with geranium essential oil on reducing pulse rate and systolic blood pressure was significantly greater than aromatherapy with lemon essential oil (P <0.001). Conclusion: According to the results of the present study on the effect of aromatherapy on anxiety in patients after angioplasty, it is recommended to use aromatherapy as a complementary and low-risk treatment to reduce anxiety in this group of patients.

Chemical Fingerprinting of the Geranium (Pelargonium graveolens) Essential Oil by Using FTIR, Raman and GC-MS Techniques

Geranium oil is known as a floral substitute of rose essential oil with its pungent rose-like odor and is one of the most valuable essential oils. Favorable quality properties make the geranium essential oil exigible for food industry applications. This study determined the chemical fingerprint of geranium essential oil using robust vibrational spectroscopy techniques (Fourier transform infrared spectroscopy and Raman spectroscopy). The mid-infrared characterization was accomplished on the basis of functional chemical groups of geranium essential oil. GC-MS (gas chromatography-mass spectroscopy) technique was used for the detection and quantification of the volatile constituents of geranium essential oil. 37 (thirty-seven) volatile compounds were determined by the GC-MS analysis. The most abundant compounds were determined as Citronellol (30.68 %), Geraniol (9.68%) and Citronelly formate (9.90%).

Quantification of the Geranium Essential Oil, Palmarosa Essential Oil and Phenylethyl Alcohol in Rosa damascena Essential Oil Using ATR-FTIR Spectroscopy Combined with Chemometrics

Rosa damascena essential oil is an essential oil that has the greatest industrial importance due to its unique quality properties. The study used ATR-FTIR (attenuated total reflectance-Fourier transform infrared) spectroscopy coupled with chemometrics of PLSR (partial least squares regression) and PCR (principal component regression) for quantification of probable adulterants of geranium essential oil (GEO), palmarosa essential oil (PEO) and phenyl ethyl alcohol (PEOH). Hierarchical cluster analysis was performed to observe the classification pattern of Rosa damascena essential oil, spiked samples and adulterants. Rosa damascena essential oil was spiked with each adulterant at concentrations of 0–100% (v/v). Excellent R2 (regression coefficient) values (≥0.96) were obtained in all PLSR and PCR cross-validation models. The SECV (standard error of cross-validation) values ranged between 0.43 and 4.15. The lowest SECV and bias values were observed in the PLSR and PCR models, which were built by using the raw FTIR spectra of all samples. Hierarchical cluster analysis through Ward’s algorithm and Euclidian distance had high potential to observe the classification pattern of all adulterated and authentic samples. In conclusion, the combination of ATR-FTIR spectroscopy with multivariate analysis can be used for rapid, cost-effective, easy, reliable and high-throughput detection of GEO, PEO and PEOH in Rosa damascena essential oil.

Antifungal activity screening for 32 essential oils against Rhizopus stolonifer

In order to screen out essential oils with better inhibitory effects on Rhizopus stolonifera and their appropriate concentrations, an in vitro antibacterial and drug susceptibility tests was conducted to determine the effects of 32 essential oils on the growth of grape R. stolonifera. The results showed that 1000 μl/L of clove, geranium, agilawood and lovage essential oils could completely inhibit the growth of R. stolonifera within 48 hours. Through follow-up verification, it was found that 1000 μl/L of clove, geranium and lovage essential oils had a continuous inhibitory effect on the growth of R. stolonifera, and the inhibition rate was continuing to 100% from 2 to 8 days. When the concentration was 250 μl/L, only lovage essential oil had high inhibition rate. Therefore, lovage essential oil can effectively inhibit the growth of R. Stolonifer on grape, and the appropriate concentration should not be less than 250 μL/L.

Influence of eight chosen essential oils in the vapor phase on the growth of Rhizopus stolonifer and Rhizopus lyococcus

This study aimed to evaluate the fungicidal effect of eight essential oils against five strains of the genus Rhizopus. Strains were obtained from various moldy foods, namely Rhizopus stolonifer KMi 383 from chestnut, R. stolonifer KMi 510 from strawberry, R. stolonifer KMi 511 from nectarine, R. stolonifer KMi 524 from cherry tomatoes, and R. lyococcus KMi 512 from blackberry. The essential oils (EO) used in this study were jasmine EO (extract from Jasminum officinale L.), bergamot EO (Mentha aquatica L. var. citrata (Her.) Fresen), bitter orange EO (from Citrus aurantium L.), grapefruit EO (Citrus paradisi Macfady), sweet flag EO (East Asian Calamus, from Acorus calamus L. var. angustatus Bes), star anise EO (from Illicium verum J.D.Hook), geranium EO (from Pelargonium graveolens), and lemongrass EO (from Cymbopogon citratus DC). The semi-quantitative composition of the essential oil samples was determined by gas chromatography coupled with mass spectrometry (GC-MS). The antifungal activity of essential oils against the strains of R. stolonifer and R. lyococcus was determined during 7 days, using the micro-atmosphere method (0.625 μL.mL-1 of air). Two essential oils, geranium and lemongrass, completely inhibited the growth of all isolates. Bitter orange essential oil inhibited the growth of all isolates of Rhizopus stolonifer, but isolate of Rhizopus lyococcus began to grow after four days of cultivation. In conclusion, certain essential oils are highly effective in the vapor phase. These could be used in further tests of their antifungal activity and could be used in the control of Rhizopus spp. or other fungal pathogens.

Comparison of Identified Compounds from Extracted Pelargonium Radula Leaves by Supercritical Fluid Extraction and Commercial Geranium Essential Oil

Supercritical fluid extraction (SFE) is a green technology that is convenient to extract Pelargonium radula (P. radula) leaves without leaving any negative impacts on the environment. It is an alternative approach to reduce the solvent residual problem during the extraction process. Therefore, this research was performed to compare the active ingredients extracted by SFE technique with the commercialized geranium essential oil in the market. Extraction of powdered P. radula leaves by supercritical carbon dioxide (SC-CO2) was operated at constant pressure, temperature, and solvent flowrate which were 100 bar, 40 °C, and 24 mL/min, respectively. SC- CO2 extraction on P. radula leaves result in 0.19 % of oil yield. By comparing extracted P. radula oil with the commercialized geranium essential oil, both oil consists of benzyl acetate, citronellol, geraniol, e-amyl cinnamaldehyde, isopropyl tetradecanoate, and isopropyl hexadecanoate.

Extracts of herbs and alcohol increase vase life of Dianthus caryophyllus L. cv 5 ‘Yellow Candy’

Some chemicals such as 8-HQS used for prolonging the vase life of cut flowers are harmful to human health. Therefore, it is necessary to identify natural compounds to delay senescence and tissues destroying of cut flowers. Essential oils with antimicrobial properties can have a significant effect on the vase life of cut flowers without any problems. The effect of dill (<em>Anethum graveolens</em>), geranium (<em>Pelargonium graveolens</em>) and caraway (<em>Cuminum cyminum</em>) essential oils and alcohol on the vase life of <em>Dianthus caryophyllus</em> L. cv ‘Yellow Candy’ were investigated. Gas Chromatography/Mass Spectrometry (GC/MS) analysis of the essential oils showed that the highest percentage of essences in geranium (13.03 %), caraway (26.05 %) and dill (52.23 %) were geraniol, methyl-3-phenyl-2-propenal and linalool, respectively. Vase life was increased to 15.43 and 15.11 by using 100 mg·L<sup>-1</sup> dill and 50 mg·L<sup>-1</sup> 28 geranium essential oil solutions, respectively. Solution uptake (2.18 mL·g<sup>-1</sup> FW) and the activity of catalase (1.78 µg·g<sup>-1</sup> 29 FW) were also highest in 100 mg·L<sup>-1</sup> dill essential oil solution compared to distilled water (1.07 mL·g<sup>-1</sup> 30 FW and 0.90 µg·g<sup>-1</sup> FW, respectively). In conclusion, the 2 % alcohol, 100 mg·L<sup>-1</sup> dill, 50 mg·L<sup>-1</sup> 31 geranium, and 100 mg·L<sup>-1</sup> 32 cumin induced the highest vase life. Therefore, dill essential oil (at a concentration of 100 mg·L<sup>-1</sup> 33 ) is introduced as the most appropriate, effective and safest treatment.

The effect of inhalation aromatherapy of geranium on pain and physiological indices after appendectomy: A double-blind randomized clinical trial

IntroductionThe aim of the present study was to evaluate the effect of inhalation aromatherapy with sweet-scented geranium essential oil on pain and physiological indices after appendectomy. MethodsThis double-blind clinical trial was performed on 120 patients undergoing appendectomy. Aromatherapy was performed with 1% sweet-scented geranium and sweet almond oil in the experimental placebo groups, respectively. Physiological symptoms were recorded before induction of anesthesia, before surgery, 30 min and 4 h after surgery. The control group received no intervention and only pain intensity and physiological indices were recorded in the mentioned stages. The placebo group underwent sweet almond essential oil aromatherapy. Data collection tools included demographic information form, physiological index checklist, and visual pain scale. ResultsResults of 7 measurements showed significant differences between the experimental and placebo groups as well as the experimental and control groups in terms of mean heart rate, systolic and diastolic blood pressure, blood oxygen percentage, and pain (P < 0.001). ConclusionResults of the present study showed that the effect of inhalation aromatherapy with sweet-scented geranium essential oil after appendectomy reduces pain and physiological indices. Therefore, the above aromatherapy can be used as a complementary treatment along with other treatments.

Essential oils encapsulated in chitosan microparticles against Candida albicans biofilms

The aim of the study was to produce and characterize chitosan microparticles loaded with essential oils (CMEOs), evaluate the essential oil (EO) release profile and the CMEOs' anti-Candida activity. The chitosan microparticles (CMs) loaded with lemongrass essential oil (LEO) and geranium essential oil (GEO) were produced by the spray-drying method and characterized regarding CMEO morphological and physicochemical parameters and EO encapsulation efficiency (EE) and release profile. The planktonic activity was quantified by broth microdilution, and the activity against biofilm was quantified by biomass formation measurement. The LEO and GEO compositions were analyzed by gas chromatography combined with mass spectrometry (GC/MS), finding the main components citral (83.17%) and citronellol (24.53%). The CMs and CMEOs showed regular distribution and spherical shape (1 to 15 μm), without any morphological and physical modifications after EO incorporation. EE% ranged from 12 to 39%. In vitro release tests demonstrated the EO release rates, after 144 h, were 33% and 55% in PBS and HCl media, respectively. The minimum inhibitory concentration (MIC) values for CMEOs were lower than for CMs and pure EOs (P < 0.05). The higher CMEO biofilm inhibition percentage demonstrates the efficiency of microparticles against Candida biofilm. These results indicate that CMEOs are promising compounds that have antibiofilm activity against C. albicans.

Comparing the effects of geranium aromatherapy and music therapy on the anxiety level of patients undergoing inguinal hernia surgery: A clinical trial

IntroductionAnxiety may lead to negative post-surgery outcomes in patients. It is essential to find strategies to manage pre-surgery anxiety and prevent unwanted consequences in patients. Aromatherapy and music therapy can be used to help patients managing their pre-surgery anxiety. ObjectiveTo compare the effects of Geranium aromatherapy and music therapy on the anxiety level of patients undergoing inguinal hernia surgery. MethodsThis randomized clinical trial was conducted in Imam Educational Hospital in Mahabad, Iran. One hundred and fifty patients were recruited and randomly allocated to aromatherapy, music therapy, and control groups. The Spielberger State-Trait Anxiety Inventory was used to measure the patients’ pre-surgery anxiety (primary outcome) before and after the intervention. Geranium essential oil and instrumental music were used in aromatherapy and music therapy groups respectively. The patients in the control group received no intervention. The data were analyzed with SPSS version 25.0. ResultsThe results showed significant differences in the mean anxiety score of aromatherapy, music therapy, and control groups (P=0.011). Inhalation Geranium aromatherapy and music therapy groups had significantly lower mean anxiety scores compared with the control group after the intervention (P<0.001). Moreover, the value of decrease in the mean anxiety score was greater in the aromatherapy group compared to the music therapy group. ConclusionsMusic therapy and aromatherapy are recommended as inexpensive and safe complementary medicine. These methods are effective strategies to assist patients with managing their pre-surgery anxiety, which results in reduced patient post-surgery complications and shorter surgery recovery time.

Geranium and Lemon Essential Oils and Their Active Compounds Downregulate Angiotensin-Converting Enzyme 2 (ACE2), a SARS-CoV-2 Spike Receptor-Binding Domain, in Epithelial Cells.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), also known as coronavirus disease-2019 (COVID-19), is a pandemic disease that has been declared as modern history’s gravest health emergency worldwide. Until now, no precise treatment modality has been developed. The angiotensin-converting enzyme 2 (ACE2) receptor, a host cell receptor, has been found to play a crucial role in virus cell entry; therefore, ACE2 blockers can be a potential target for anti-viral intervention. In this study, we evaluated the ACE2 inhibitory effects of 10 essential oils. Among them, geranium and lemon oils displayed significant ACE2 inhibitory effects in epithelial cells. In addition, immunoblotting and qPCR analysis also confirmed that geranium and lemon oils possess potent ACE2 inhibitory effects. Furthermore, the gas chromatography-mass spectrometry (GC–MS) analysis displayed 22 compounds in geranium oil and 9 compounds in lemon oil. Citronellol, geraniol, and neryl acetate were the major compounds of geranium oil and limonene that represented major compound of lemon oil. Next, we found that treatment with citronellol and limonene significantly downregulated ACE2 expression in epithelial cells. The results suggest that geranium and lemon essential oils and their derivative compounds are valuable natural anti-viral agents that may contribute to the prevention of the invasion of SARS-CoV-2/COVID-19 into the human body.

Repellent, contact and fumigant activities of geranium (Pelargonium graveolens L.’Hér) essential oils against Tribolium castaneum (Herbst) and Rhyzopertha dominica (F.)

Geranium (Pelargonium graveolens) is an economic plant in Egypt that can resist insect infections, which may be related to its oils. Three types of geranium essential oils (geranium oil, geranium absolute and geranium stripping oil) were extracted with three different methods (steam distillation, solvent extraction, and hydrodistillation respectively). The three types of crude essential oils, three natural components (linalool, citronellol, and geraniol), and synthetic counterparts of two of these components (linalool and citronellol) were evaluated against Tribolium castaneum and Rhyzopertha dominica adults using two bioassays evaluating their repellency and fumigation effects. The tree types of crude geranium essential oils were analysed by gas chromatography/mass spectrometry (GC-MS). Chromatographic analysis of the geranium essential oils demonstrated that citronellol is the main constituent, accounting 29.70, 31.80 and 18.30% of geranium oil, geranium stripping oil and geranium absolute, respectively. Geranium absolute had the highest repellent activity against T. castaneum. In contrast, geranium stripping oil had the greatest repellency against R. dominica. Furthermore, natural linalool had the strongest fumigant effect on T. castaneum among the oil components, while citronellol had the strongest effect on R. dominica, and the oil components had stronger fumigant effects than the crude geranium oils. The fumigation activity showed the same trend as repellency against the two tested insects. Based on the LC50, the oil components having a stronger effect than the crude geranium oils. Finally, T. castaneum was more tolerant than R. dominica to all tested materials. The method of extraction effects on the chemical composition of essential oils produced from the same plant, all tested crude essential oils and its components (natural and synthetic) can be used as safe pesticide alternatives for stored product insects, geranium stripping oil is a new crude oil can increase the national income instead of losing it in waste water.