• Title, Summary, Keyword: 감나무

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Taxonomic Reconsideration of Eriococcidae (Sternorrhyncha) Occurring on the Persimmon Tree, Diospyros kakl Thunb. (감나무에 발생하는 주머니깍지벌레(진딧물아목: 주머니깍지벌레과)의 분류학적 재검토)

  • 권기면;박규택
    • Korean journal of applied entomology
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    • v.41 no.4
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    • pp.305-311
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    • 2002
  • Asiacornococcus kaki (Kuwana) known as a serious pest on Diospyros kaki Thunb. has been reported erroneously as Eriococcus lagerstroemiae Kuwana. These two species were redescribed and illustrated for correct identification by the morphological characters of adult females with known host plants. Asiacornococcus Tang & Hao is a newly known genus from the Korean Peninsula.

Antibacterial and Antibiofilm Activities of Diospyros malabarica Stem Extract against Streptococcus mutans (Streptococcus mutans에 대한 인도감나무 줄기 추출물의 항균활성 및 생물막 형성 억제 효과)

  • Kim, Hye Soo;Lee, Sang Woo;Sydara, Kongmany;Cho, Soo Jeong
    • Journal of Life Science
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    • v.29 no.1
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    • pp.90-96
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    • 2019
  • The objective of this study was to evaluate the potential of Diospyros malabarica stem extract, a natural materials, in oral health material. With this aim in mind, thin layer chromatography (TLC), TLC-bioautography, high-performance liquid chromatography (HPLC), electrospray ionization-mass spectrometry (ESI-MS), scanning electron microscopy (SEM), and real-time qPCR were performed. The antibacterial activity of D. malabarica stem extract against Streptococcus mutans KCTC3065 was confirmed in an n-hexane fraction with low polarity. The molecular weight of the antibacterial compound was estimated to be 188 by ESI-MS analysis. The inhibitory effects of the extract on biofilm formation and gene expression related to biofilm formation of S. mutans were determined by SEM and real-time PCR analysis. The extract inhibited the formation of S. mutans biofilms at D. malabarica stem extract concentrations of 1 mg/ml, as shown by SEM. The real-time PCR analysis showed that the expression of the gtfC gene, which is associated with biofilm formation, was significantly decreased in a dose-dependent manner. Based on the above results, it can be concluded that D. malabarica stem extracts, a natural materials, can be used in oral health products to suppress the formation of biofilms by inhibiting tooth adhesion of S. mutans, a causative agent of dental caries.

Antioxidant Activity of Branches of Fuyu and Nishimurawase Persimmon Trees (부유 및 서촌조생 감나무 가지의 항산화 활성)

  • You, Dong-Hyun;Jang, In-Cheol;Seo, Go-Un;Kim, Su-Jung;Yang, Eun-Kyung;Ahn, Gwang-Hwan;Matsushita, Yasuyuki;Fukushima, Kazuhiko;Lee, Seung-Cheol
    • Journal of Applied Biological Chemistry
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    • v.53 no.2
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    • pp.82-86
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    • 2010
  • The antioxidant activities of two persimmon (Diospyros kaki T.) branches were evaluated. After preparing acetone, 70% acetone, and methanol extracts from Fuyu and Nishimurawase persimmon branches, DPPH radical scavenging activity (RSA), ABTS RSA, reducing power (RP), and total phenol contents (TPC) were determined. The acetone extracts of Fuyu and Nishimurawase showed higher antioxidant properties than the other extracts. The highest TPC (22.48 mg/g), DPPH RSA ($IC_{50}=701.48\;{\mu}g/mL$), ABTS RSA ($IC_{50}=493.76\;{\mu}g/mL$), and RP ($IC_{50}=1218.57\;{\mu}g/mL$) were found in acetone extract of Fuyu, while the lowest antioxidant activities were in 70% acetone extract of Nishimurawase. The results suggest that sweet persimmon branches exhibit considerable antioxidant activity.

Seasonal Occurrence and Chemial Control Effects of Eriococcus largerstroemiae Kuwana on Persimmon Trees (감나무의 주머니깍지벌레에 대한 발생생태 및 화학적 방제효과)

  • 권태영;박소득;박선도;최부술;권용정
    • Korean journal of applied entomology
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    • v.34 no.4
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    • pp.295-299
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    • 1995
  • This study was conducted to find the control methods, status of overwintering and seasonal occurrence of Erioccoccus largerstroemiae on persimmon trees in Ch'ondo area, Kyongbuk province in Korea. Usually, overwintering eggs were sheltered in bark, among them the rate of alive eggs was 28.7%. The activiation of garpe-myrtle scale showed from late April, and they have three generations per year. The first occurrence of larval stage of Erioccoccus largerstroemiae starts from late June to early July, the second occurrence begins from middle August to late August, and from late June to early July, the second occurrence begins from middle August to late August, and from middle September to late September is the third, thus, three peaks of occurrence revealed in early July middle August, and late September respectively. Average number of eggs conceived in female adult was 229.3. Spray effect of chemical control showed as follows; lime sulfur with tow applications of pesticides (late June, late August) at 97.8%, machine oil with tow applications of pesticides (late June, late August) at 96.8%. And during the growing period, the spray results using three applications of pesticide only (late June, late August, amid September) showed 77.2% in field condition.

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감나무 해충

  • 농업과학기술원 작물보호부 농업해충과
    • Agrochemical news magazine
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    • v.23 no.8
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    • pp.44-46
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    • 2002
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