• Weed & Turfgrass Science
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• v.4 no.4
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• pp.321-329
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• 2015

The present study aimed to evaluate the phytotoxic potential of essential oils. For this purpose, 18 essential oil samples extracted from Korean plants and 64 commercial essential oils were screened for their phytotoxic potential against the seedling growth of Brassica napus L. (rapeseed). Among the 82 samples, 11 commercial oils (cinnamon, citronella, clove, cumin seed, geranium, jasmine, lemongrass, palmarosa, pimento, rose otto and spearmint) strongly inhibited the seedling growth with $GR_{50}$ value < $150{\mu}g\;mL^{-1}$. Major components from these effective essential oils were identified by solid phase microextraction/gas chromatography-mass spectrometry (SPME/GC-MS). GC-MS analyses revealed that the effective samples mainly consist of benzyl benzoate, carvone, citral, citronellol, eugenol, geraniol, D-limonene and terpinene. Subsequently, bioactivity of these individual components was evaluated against the seedling growth of B. napus, Echinochloa crus-galli and Aeschynomene indica. The components from different chemical groups exhibited different potency in inhibiting the seedling growth with varied $GR_{50}$ values ranged from $29{\mu}g\;mL^{-1}$ to > $1000{\mu}g\;mL^{-1}$. In the greenhouse experiment, citral and geraniol completely suppressed the growth of all the tested 10 plants at $100kg\;ha^{-1}$. In conclusion, the individual essential oil components geraniol and citral could be used as natural herbicides for weed management.

• Korean journal of applied entomology
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• v.44 no.1 s.138
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• pp.37-41
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• 2005

Essential oil of five plants were screened for fumigation toxicity against Blattella germanica male adults. Among them, coriander oil showed $100\%$ fumigation toxicity against B. germanica male adults at 20 and $10{\mu}{\ell}/{\ell}$ (air) dose, respectively. Through the constituent analysis using GC and GC/MS, we confirmed that main constituents of coriander oil were ${\alpha}$-pinene ($6.1\%$), camphene ($1.1\%$), ${\beta}$-pinene ($0.5\%$), ${\beta}$-myrcene ($0.8\%$), limonene ($2.5\%$), ${\gamma}$-terpinene ($4.5\%$), ${\rho}$-cymene ($1.8\%$), ${\alpha}$-terpinolene ($0.5\%$), camphor ($4.9\%$), linalool ($70.5\%$), ${\alpha}$-tepineol ($0.7\%$), geranyl acetate ($2.8\%$) and geraniol ($1.4\%$). Among them, ${\gamma}$-terpinene and geranyl acetate showed $100\%$ fumigation toxicity at $10{\mu}{\ell}/{\ell}$ (air) dose, respectively. It can be concluded that coriander oil is potential control agents against B. germanica.

• The Korean Journal of Food And Nutrition
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• v.18 no.1
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• pp.48-53
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• 2005

Herbs and yucca(Yucca shidigera) are widely used a source of tea and otherwise such as botanical medicine, essential oil for perfumes, cosmetics, and food spices. This study was carried out to investigate the characteristics of herb tea prepared with lemon verbena, spearmint, apple mint, Korea mint, rosemary, pineapple sage, Chrysanthemum indicum, stevia, lavender, lemon balm cultivated in Korea and effects by addition of yucca. Approximate composition of yucca were as follows: moisture 5.88%, crude protein 5.46%, crude fat 0.69%, crude ash and 7.59%. pH of herb tea mixed yucca at 80℃ was decreased in lemon verbena, spearmint, apple mint, Korea mint, and rosemary in comparison herb tea alone, but soluble solids were similar in two tea. In the result of sensory test, herb tea and herb tea mixed Yucca were not difference with a few exceptions. pH of mentha(Korea mint) tea by addition of yucca was decreased according to increment amount of yucca. The sensory evaluation score of mentha tea by addition of yucca were increased when the tea was processed with 0.01∼0.04% yucca.

• Journal of Applied Biological Chemistry
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• v.58 no.2
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• pp.175-181
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• 2015

Compositions of essential oils extracted from mint herb such as Mentha piperita, Mentha spicata, and Mentha ${\times}$ piperita var. citrate produced in Jeju were analyzed using gas chromatography-mass spectrometry (GC-MS) and headspace-GC-MS (HS-GC-MS). By the GC-MS analysis, 13 compounds were tentatively identified in Mentha piperita, Mentha spicata, and Mentha ${\times}$ piperita var. citrate, respectively. Peperitenone oxide, carvone, and linalool were detected as major compounds in Mentha piperita, in Mentha spicata, in Mentha ${\times}$ piperita var. citrate, respectively, based on the ratio of peak intensity in the total ion chromatogram. The greater number of compounds, including volatile alcohols and acetates were identified by HS-GC-MsS than by GC-MS in these all three essential oils. Similar patterns of composition were detected in both Mentha spicata and Mentha ${\times}$ piperita var. citrate by either one of GC-MS methods. However, in case of Mentha piperita, $\small{L}$-(-)-menthol, which was identified as the major compound by HS-GC-MS was detected in dramatically reduced quantity by GC-MS. Interestingly, we found that both linalyl acetate and linalool were identified as the dominant compounds in the essential oil of Mentha ${\times}$ piperita var. citrate.

• Korean Journal of Poultry Science
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• v.34 no.1
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• pp.43-52
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• 2007

Experiments were conducted to investigate the effects of dietary botanicals (herbs and plant extracts) on the performance, nutrient metabolizability, small intestinal microflora, IgG level and blood parameters in broiler chickens. In Exp. 1, 1,000 (500 each sex) broiler chicks($Ross^{(R)}$) were divided into 20 groups of 50 chickens each(25 birds each sex). Four groups were assigned to each of five dietary treatments:control and diets containing antibiotics($Avillamix^{(R)}$, avillamycin-premix), Herb M(Herb $mix^{(R)}$), Plant extract B(BIOSTRONG $510^{(R)}$) and Plant extract A($APEX^{(R)}$). In Exp. 2, 240(120 each sex) broiler chicks($Ross^{(R)}$) were devided into six treatment groups:control and diets containing antibiotics($Avillamix^{(R)}$, avillamycin-premix), Plant extract D($Digestarom^{(R)}$), Plant extract P($Phellozyme^{(R)}$), Plant extract G($Galicin^{(R)}$) and Plant extract C(CRINA $POULTRY^{(R)}$). Each treatment consisted of four replicates of 10 birds each. In both experiments, birds had free access to diets and water for 5 wk on floor pens(Exp. 1) and cages(Exp. 2). In Exp.1, production index of groups fed diets supplemented with herbs and plant extracts was slightly higher than the control and those fed Herb M was highest. In Exp. 2, groups fed diets supplemented with herbs and plant extracts consumed more feed than the control during the period between 4 and 5 wk(P<0.05). Feed conversion(feed/gain) was lower in antibiotics group than other groups. The values of RBC, Hb and HCT were higher(P<0.05) in chicken fed diets supplemented with the additives than in the control in Exp. 1. BA value was lower(P<0.05) in groups fed diets supplemented with the additives than in the control in Exp. 2. Serum IgG were higher(P<0.05) in groups fed diets supplemented with the additives than in the control in both experiments. The cfu of intestinal microflora and metabolizability of nutrients were not significantly different among treatments in both experiments. It was concluded that the botanical supplements can be used as an alternative to antibiotics in broiler diets.