Myung-Pyo Jung

National Academy of Agricultural Science (South Korea) · Department of Agricultural Environment

Improved daily precipitation estimations were attempted using the parameter-elevation regressions on a parameter-elevation regression on independent slopes model (PRISM) with inverse-distance weighting (IDW) and a precipitation-masking algorithm for precipitation areas. The PRISM (PRISM_ORG) suffers two overestimation problems when the daily precip...

Carbon dioxide (CO_2) and methane (CH_4) were measured in a rice-barley double cropping and rice mono cropping paddy fields, which are located in the southwestern coast of Korea, over a one-year period. Net ecosystems CO_2 exchange (NEE) and ecosystem respiration (Re) were estimated by the eddy covariance (EC) method, and an automatic open/close ch...

Carbon dioxide (CO_2) gases concentration in atmosphere has been growing since preindustrial times. By sequestering a large amount of atmospheric carbon (C), terrestrial ecosystems are thought to offer a mitigation strategy for reducing global warming. Woody agro-ecosystems such as fruit tree are among the least quantified and most uncertain elemen...

In this study, we analyzed the relationship between rice yield and abnormal meteorological features for El Ni{\tilde{n}}o years (with more than 1.0 Oceanic Ni{\tilde{n}}o Index) since 1980 in South Korea. The national averaged rice yield of El Ni{\tilde{n}}o years (n

Fuji apple variety introduced in Japan has excellent storage quality and good taste so it is most commonly cultivated in the Korean Peninsula. Accurate prediction of harvest maturity allows farmers to more efficiently manage their farm, such as working time, fruit storage, market shipment and labor distribution so it is very important. This study w...

The complaint was filed for the cold water damage to rice in accordance with the installation of buried drain pipes in the mountainous areas of the valley. Field research was conducted in order to identify and analyze relevance of cold water damage to rice with underground drain pipe installation. In conclusion, water temperature was analyzed by 0....

BACKGROUND: The growing season (GS) has been understood as a useful indicator for climate change due to high relationship with increasing temperature. Hear this study was conducted to examine changes in the thermal GS over South Korea from 1970 to 2013 based on daily mean air temperature for assessing the temporal and spatial variability in GS. MET...

This study was conducted to classify agro-climatic zones in Northeast district of China. For agro-climatic zoning, monthly mean temperature and precipitation data from Global Modeling and Assimilation Office (GMAO) of National Aeronautics and Space Administration (NASA, USA) between 1979 and 2010 (http://disc.sci.gsfc.nasa.gov/) were collected. Alt...

Fluxes of carbon dioxide (CO_2) were measured above crop canopy using the Eddy Covariance (EC) method, and emission rate of methane (CH_4) was measured using Automatic Open/Close Chamber (AOCC) method during the 2012-2013 barley and rice growing season in a barley-rice double cropping field of Gimje, Korea. The net ecosystem exchange (NEE) of CO_2...

According to statistical data the past ten years, cultivation area and yield of radish are steadily decreasing. This phenomenon cause instability of radish`s supply due to meteorological chage, even if radish`s yield per unit area is increasing by cultivation technological development. These problems raise radish`s price. So, we conducted study on...

Air temperature has increased, while sunshine hour has decreased during the grain filling period of most rice cultivars (August to September) during the past 12 years from 2001 through 2012 in Korea. Climatic Productivity Index (CPI) has fallen because of the decreased sunshine hour and increased air temperature during the grain filling period, and...

Rice-barley double cropping system is typical in southwestern part of South Korea. However, the information of carbon dioxide (CO_2) exchange for barley growing season has still limited in comparison with rice. Using the eddy covariance (EC) technique, seasonal variation of CO_2 exchange was analyzed for the barley growing season at a rice-barley d...

The occurrence of abnormal sunshine duration was analyzed using meteorological data collected from 60 observation stations during the last 38 years (1973-2010). The 20 agro-climatic zones defined by the Rural Development Administration, were used as a spatial unit for the analysis. On average, abnormal duration of sunshine occurred 1.24 times per y...

In this study, the installation effects of a windbreak net on reducing wind speed were examined using meteorological observation data. Three automatic weather systems (AWS) were installed at the inside of the windbreak net of an apple orchard along the distance, and one AWS was located at the outside. They were set up on Oct. , 2012 at the apple or...

Based on the results of continuous flux measurements at the Gimje paddy flux site in the southwestern coast of Korea, carbon dioxide and energy exchanges between customarily cultivated rice-barley double cropping paddy field and the atmosphere during the 2012 rice growing season (from Jun. 2012 through Oct. 2012) were analyzed. Carbon dioxide and e...

Recently, climate change scenarios were substituted by the Special Report on Emission Scenarios (SRES) for Representative Concentration Pathway (RCP). Using the RCP scenario, the World Meteorological Organization (WMO) produced new climate change scenarios. Further, the National Institute of Meteorological Research (NIMR) of Korea produced new clim...

According to the Intergovernmental Panel on Climate Change (IPCC), the global mean surface temperature increased by 0.74°C between 1906 and 2005, and is expected to continue rising. In Korea, the temperature increased rapidly by 1.8°C between 1912 and 2010. The effect of global warming are expected to cause phenological changes in exothermic organi...

To improve the insecticidal activity of Autographa californica nucleopolyhedrovirus (AcMNPV), using co-expression of Bacillus thuringiensis crystal protein and a Kunitz-type toxin isolated from bumblebee Bombus ignitus venom, a recombinant AcMNPV, ApPolh5-3006BiKTI, expressing Bi-KTI under the control of early promoter from Cotesia plutellae bracov...

To understand how researchers are tackling globally important issues, it is crucial to identify whether current research is comprehensive enough to make substantive predictions about general responses. We examined how research on climate change affecting insects is being assessed, what factors are being tested and the localities of studies, from 17...

Dataset This dataset is also available via figshare

* Insects in temperate regions are predicted to be at low risk of climate change owing to high thermal safety margins (low optimal performance temperature relative to habitat maxima) and/or high warming tolerance (high thermal tolerance relative to habitat maxima) relative to more tropical species. However, these assumptions have been generally poo...

AbstractA novel recombinant Autographa californica nucleopolyhedrovirus (AcMNPV), ApPolh5‐3006AvTox2, co‐expressing two insecticidal toxins, one isolated from the spider Araneus ventricosus, and the other from Bacillus thuringiensis, was constructed to improve the insecticidal activity of AcMNPV. The recombinant virus was designed to express insect...

This study was conducted to monitor the abundance and distribution of the ussur brown katydid, Paratlanticus ussuriensis in South Korea, and to gather basic information about potential outbreak areas of this species. P. ussuriensis samples were collected from April to July in 2009 and 2010 using the transect method at the city or gun level. P. ussu...

Paratlanticus ussuriensis eggs overwinter by entering diapause, which can be prolonged to more than 1year depending on environmental conditions. To determine temperature effects on diapause duration of P. ussuriensis eggs, the rates of embryonic development and hatching were compared at various temperatures conditions by measuring embryonic stages...

Previous studies have proposed that Pardosa astrigera L. Koch (Lycosidae) can be used as a biological indicator of heavy metal contamination in soil. In this study, we estimated the bioaccumulation levels and the bioconcentration factors (BCF) of four heavy metals (Cd, Cu, Pb, and Zn) in adult female P. astrigera collected from various field sites...

Aquatic invertebrates are the major important fauna to sustain the paddy ecosystem as predators of the lower trophic level and prey for birds in food-web dynamics as well. The nationwide distribution of scavenger beetles (Hydrophilidae) that is the top predator in an aquatic insect in the paddy field was investigated. A total of 15 scavenger beetle...

Laboratory trial on the control effect of Beauveria bassiana against Paratlanticus ussuriensis was carried out with fungi collected from South Korea, China and Peru. All B. bassiana species from collected at each site had a strong fungicidal activity against P. ussuriensis. The Abbott's formula was the highest showing 100% mortality and the others...

The aim of this study was to provide basic informations for restoring a habitat of Nannophy pygmaea Rambur. Environments and flora of the habitats were investigated in Youngdong, Sanbuk, and Nongam South Korea. The habitats were abandoned paddy fields with tree-unshaded space and with the water depths of about 2 - 10 cm all the year round. The wate...

Characteristics of habitat alteration and post-embryonic development of Paratlanticus ussuriensis were investigated in the mountain region of Bitanri, Yeongdong county, Chungcheongbuk-do from 2007 to 2009. Overwintered eggs under the ground in the hillside were hatched from late March to early April. The soil temperature during this season was . Yo...

Temperature effects on diapause termination of Paratlanticus ussuriensis eggs were studied by measuring embryonic development and hatching rates at various conditions of indoor chilling and overwintering temperatures. Diapausing eggs of P. ussuriensis did not hatch at continued incubation at and even after chilling for once at either or for 30, 45...

Two new species of the genus Atypus, Atypus sternosulcus new species from Andong and A. suwonensis new species from Suwon, are newly described from Korea.

The effect of earthworm and dung beetle on cattle dung pat decomposition was assessed by combining quantification of earthworm density and with or without dung beetle in pats and measurements of the decomposition rate of these pats. Cattle dung decomposition rate was higher in the pots treated with both earthworm and dung beetle than in the pots wi...

In 2006 and 2007, there was a big outbreak of the Ussur Brown Katydid, Paratlanticus ussurriensis in the central part of Korea attacking some orchard trees. Until 2000, the katydid had not been regarded as an agricultural pest because they were distributed widely in Korea with low population density and their habitats were confined mainly to hillsi...

The aim of this study was to investigate the vegetation types of Minarimot, in Jeju Islands. The vegetation types were classified by the Z-M school method and cluster analysis. The vegetation in Minarimot was classified into 6 communities and 2 subcommunities: Persicaria thunbergii-Isachne globosa community (vegetation type: A), Scirpus tribangulat...

This study was conducted to determine the phototactic response of Paratlanticus ussuriensis to different wavelength of light by the use of LEDs and to provide a basic information for developing an improved trap with the longer trapping efficiency to control environment-friendly this katydid. P. ussuriensis were attracted to the single LED light sou...

This study was conducted to investigate the relationship between ground-dwelling spider communities and the degree of soil contamination of heavy metals, Cd and Pb. Six sites were selected according to expected differences in Cd and Pb contamination levels in soil and similarity in vegetation composition. Ground-dwelling spiders were collected mont...

This study was conducted to define diversity and community structure of ground-dwelling spider species in agricultural field margins and to propose potential biological indicator species or groups by focusing on dominant groups for comparison of biodiversity among habitats. The study was conducted in Paltan-myun, Hwaseong-si, Gyeonggi-do, Korea. Gr...

Using biological indicators to evaluate the healthiness of ecological habitats is increasingly important. Spiders are considered very useful candidates for this purpose, but few studies have been conducted. This study was conducted to investigate a relationship between heavy metal (cadmium (Cd) and lead (Pb)) contamination levels in soil habitats a...

Studying the spatial pattern of insect pests and the temporal stability of their patterns is important in understanding underlying ecological mechanisms and in developing pest management programs in cultivated crop systems. To elucidate the spatio-temporal pattern of the black rice bug, Scotinophara lurida, in rice fields, samplings were conducted...

Insect fauna in adjacent areas of Demilitarized Zone (DMZ) in Korea was surveyed seasonally in 2001{\sim}2003. The survey area was divided into 3 regions (eastern mountain, middle inland, and western coastal regions) in accordance with administrative districts and topography. Sampling methods such as sweeping, sieving, beating, brushing and suction...

To investigate the rate and extent of heavy metal accumulation in a potential indicator species of wolf spider, Pardosa astrigera (L. Koch) (Araneae: Lycosidae), adult spiders were exposed to three different heavy metals by dietary uptake. The spiders were regularly fed with heavy metal-coated fruit flies (20 mM CdCl2, 10 mM PbCl2, 10 mM HgCl2; sin...

Two new species of litter-inhabiting leptonetid spiders from Korea are described: Leptoneta namkungi sp. nov. from Mt. Buyong, Chungcheongbuk-do, and Leptoneta kwangreungensis sp. nov. from Kwangreung, Gyeonggi-do.

Survey was conducted to determine the composition of the spiders in a grape vineyard by using pitfall traps in Sunggeo-eup, Chunan in 1999. Total 17 genera and 19 species belonging to 10 families of spiders were identified. The dominant family was Linyphiidae. Overall, the seasonal fluctuation of the spider population showed two peaks a year. The r...