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Lee C.M.,Korea forest Research Institute | Kwon T.-S.,Korea forest Research Institute | Park Y.K.,Korea Beneficial Insects Laboratory | Kim S.-S.,Research Institute for East Asian Environment and Biology | And 2 more authors.
Journal of Asia-Pacific Biodiversity | Year: 2014

This study was conducted to examine the community structure and diversity of beetles (Coleoptera) inhabiting diverse forest management areas in the Gariwangsan Mountain. The survey was carried out monthly at five study sites of the national forest including a clear-cut area, a heavily thinned forest, a selectively thinned forest, a larch plantation, and a deciduous forest from May 2011 to September in 2011. Beetles were sampled using pitfall trap, Malaise trap, black light, and sweeping. A total of 4883 beetles belonging to 310 species in 43 families were collected. The diversity in the selectively thinned site was lower compared with that in other sites. Of the sampling methods, Malaise traps showed the highest efficiency for collecting diverse beetles. The composition of the functional guild for beetles directly sampled using the sweeping method was different from the composition of those sampled by other methods (e.g. pitfall trap, Malaise trap, and black light), which depended on the activity of the insects. Copyright © 2014 National Science Museum of Korea (NSMK) and Korea National Arboretum (KNA).

Choi H.-Y.,Eulji University | Yang Y.-C.,Korea Beneficial Insects Laboratory | Hyeock Lee S.,Seoul National University | Marshall Clark J.,University of Massachusetts Amherst
Journal of Medical Entomology | Year: 2010

The control efficacy of clove, Eugenia caryophyllata, and eucalyptus, Eucalyptus globulus, essential oils and 15 formulations containing these essential oils alone (8, 12, and 15% sprays) and their binary mixtures (7:3, 5:5, and 3:7 by weight) against adult females of insecticide-susceptible KR-HL and dual malathion - and permethrin-resistant BR-HL strains of head louse, Pediculus humanus capitis (De Geer), was examined by using contact plus fumigant and human hair wig (placed over the head of mannequin) mortality bioassays. In contact plus fumigant mortality bioassay, essential oils from eucalyptus (0.225 mg/cm2) and clove (1.149 mg/cm2) were less effective than either d-phenothrin (0.0029 mg/cm2) or pyrethrum (0.0025 mg/cm 2) based on 6-h median lethal concentration values. However, the efficacies of eucalyptus and clove oils were almost identical against females from both strains, despite high levels of resistance of the BR-HL females to d-phenothrin (resistance ratio, 667) and pyrethrum (resistance ratio, 754). In human hair wig mortality bioassay, eucalyptus oil spray treatment gave better control efficacy than either spray treatment with clove oil alone or their binary mixtures, Thus, eucalyptus applied as 8% sprays (15 or 20 ml) appears to provide effective protection against pediculosis even to insecticide-resistant head louse populations. Once the safety issues resolved, covering the treated hair and scalp with bath shower cap or hat would ensure the fumigant action of the essential oil. © 2010 Entomological Society of America.

Kwon T.-S.,Korea forest Research Institute | Park Y.K.,Korea Beneficial Insects Laboratory | Lim J.-H.,Korea forest Research Institute | Ryou S.H.,Seowon University | Lee C.M.,Korea forest Research Institute
Journal of Asia-Pacific Entomology | Year: 2013

Forest fires are one of the most frequent and important causes of forest disturbances, the occurrence of which is globally increasing due to the effects of climate change. This study aimed to determine the impacts of fire and human activity on arthropod communities in affected forests. Twelve study sites in three burned areas were selected for this study. Intensities of disturbance in the study sites were characterized as follows: Disturbance Degree (DD) 0 (no fire), DD 1 (surface fire), DD 2 (crown fire), and DD 3 (crown fire followed by reforestation). Arthropods were collected using pitfall traps. Fourteen arthropod taxa (families, orders or classes), which are relatively homogeneous in their feeding habits and abundant, were analyzed. Depth of litter layer was selected as an environmental indicator for disturbance intensity, as it decreases linearly as the degree of disturbance increased. Changes of arthropod abundance in response to disturbance differed among functional guilds. As disturbance intensity increased, the abundance of detritivores decreased, but the abundance of herbivores increased. However, the abundance of predators varied between taxa. Formicidae and Araneae increased in disturbed sites, whereas Carabidae and Staphylinidae did not change. The abundance of Thysanura and Diptera was highly correlated with disturbance intensity, and may be suitable as a bioindicator for forest disturbance. Arthropod communities were more heterogeneous in forests of intermediate disturbance. © 2013 Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society.

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