혹명나방 개체군의 수원지역 발생 패턴 및 몇가지 약제에 대한 반응

박홍현,조점래,박창규,김광호,고현관,이상계,Park, Hong-Hyun,Cho, Jum-Rae,Park, Chang-Gyu,Kim, Kwang-Ho,Goh, Hyun-Gwan,Lee, Sang-Guei 한국응용곤충학회 2010 한국응용곤충학회지 Vol.49 No.3

연구는 2004년부터 2007년까지 수원지역에서 혹명나방 발생과 피해 특성들 및 우리나라와 베트남에서 채집한 개체군들이 몇 가지 약제에 대한 반응을 조사하였다. 포장에서 채집한 유충들의 발육단계는 본 연구의 실내사육충을 대상으로 측정한 두폭과 체장자료를 통해 구분이 가능하였다. 2004년부터 2007년까지 벼 포장에서 조사된 혹명나방은 발생이 많거나 적은 해로 패턴이 분명하게 구분되었다. 발생이 적은 해(2004년 및 2006년)에는 성충이 한 번의 발생 최성기(8월 하순)를 가졌고, 7월 하순의 피해주율이 10% 미만이었으며, 9월 동안에 피해엽률이 2% 수준이었다. 하지만 발생이 많은 해(2005년 및 2007년)에는 두 번의 성충 발생 최성기(8월 초순과 9월 중순)를 가졌고, 피해주율도 7월 하순에 약 30%에 달하였으며, 9월동안에 피해엽률이 15~30%로 경제적 피해수준을 넘었다. 특히 7월 하순과 8월 상순에 조사된 성충 밀도나 피해주율의 크기는 9월에 발생하는 피해규모와 밀접하게 정의 상관이 있었다. 따라서 본 연구결과로 볼 때 7월 하순과 8월 상순에 혹명나방 성충의 발생 및 벼 피해에 관한 예찰정보는 벼 생육후기의 피해예측 및 방제적기 선정에 활용할 수 있을 것으로 여겨진다. 또한 우리나라와 베트남에서 채집한 혹명나방에 대한 약제반응은 두 지역 채집계통에서 모두 IGR계인 tebufenozide, methoxyfenozide나 유기인계인 chlorpyrifos-methyl, pyridaphenthion에는 매우 높은 감수성을 보였으나, 칼탑계인 cartap에는 약제 감수성 정도가 다소 낮았다. This paper presents the occurrence and damage characteristics of the rice leaf-folder populations in the paddy fields of Dangsu-dong, Suwon from 2004 to 2007, and also reports the insecticide response of rice leaf-folder populations, which were collected from 2005 to 2006 in Korea and Vietnam. Laboratory measurements of the head capsule width and body length data enabled the identification of the rice leaf-folder larva stages collected in the field. The rice leaf-folder population in Suwon from 2004 to 2007 has a clear pattern consisting of two different group: the low and high density years. During the low density years (2004 and 2006), only one adult peak was noted in late August, with the damaged-hill percent less than 10% in late July, and the damaged-leaf percent around 2% in September. In contrast, during the high density years (2005 and 2007), two adult peaks were noted in early August and mid-September, with the damaged-hill percent was around 30% in late July, and the damaged-leaf percent 15 to 30% in September, which was beyond the economic injury level of rice leaf-folder. High correlations existed between the occurrence of rice leaf-folder in late July and early August and damages to rice during September. Based on these results, we suggest that the information on the rice leaf-folder population monitored by the adult density or damaged-hill percent in late July and early August would be very useful for predicting the damages later in the season for aiding in decision-making for timely control. In addition, the regional populations of rice leaf-folder showed the similar responses to the insecticides tested: high susceptibility to IGRs (tebufenozide and methoxyfenozide) and organophosphates (chlorpyrifos-methyl, pyridaphenthion), but relatively low to cartap.

Controlling cellular microenvironments to regulate chondrogenic differentiation using synthetic extracellular matrices

박홍현,김도윤,이근용 한국고분자학회 2014 한국고분자학회 학술대회 연구논문 초록집 Vol.2014 No.10

Biodegradable cell - cross - linked hydrogels for tissue regeneration

박홍현,이근용 한국고분자학회 2012 한국고분자학회 학술대회 연구논문 초록집 Vol.2012 No.4

식품의 안전한 취급방안

박홍현 대한영양사회 1995 國民營養 Vol.170 No.-

Quantifying interactions between polymers and cells using FCS

박홍현,이근용 한국고분자학회 2009 한국고분자학회 학술대회 연구논문 초록집 Vol.2009 No.10

참깨유와 박의 물리화학적 특성

박홍현 한국식품산업협회 1980 좋은식품 Vol.55 No.-

경기도 반월지역에서의 농업용수 수질에 따른 수도포장내 절지동물군집

박홍현,이준호,배윤환 한국생태학회 1997 Journal of Ecology and Environment Vol.20 No.5

The effects of three different irrigating water qualities(clean water, life sewage and animal sewage) on the pattern of arthropod communities in the rice fields were investigated at Banwol, Kyonggi-do, mid-western part of Korea from 1994 to 1996. The total density of arthropod was highest in the rice field which was irrigated with clean water(clean water field), and the arthropod community was mainly composed of aphids and collembolans. Each functional group was found in the order of 'pests>non-pests>natural enemies' in its density. The dominant taxa in the pest group were aphids, planthoppers(Delphacidae), leafhoppers(Cicadelidae) and rice water weevil(L. oryzophilus). In the non-pest group collembolans, non-biting midges and dipterans were main arthropods, and in the natural enemy group Araneae was the dominant taxon. In the early growth stage of rice plant the dominant functional group was pests, and in the mid growth stage both the pest and the natural enemy group became dominant. But in the late growth stage none of the functional group was dominant over the other functional groups. The densities of spiders were much more higher in the clean water field than in the other fields. And through all the growth stages of rice plants the density of spiders in clean water field kept increase in contrast to the others. The species composition of spiders in the life sewage field was similar to that in the animal sewage field, but in the clean water field it was different from the other two fields.

해충관리 수준이 다른 이양재배 논에서의 거미의 발생과 개체군 동태

박홍현,이준호,김승태 한국생태학회 2005 Journal of Ecology and Environment Vol.28 No.5

This study was conducted to evaluate the effect of the conventional pesticide application systemon the rice spider community based on the quantitative inin Baran area, Hwasung-si, Kyeonggi-do from 1996 to 1998. Spiders were the highest dominant group comprising over 90% of all natural enemies in their density, and showed very stable yearly ocurrence. In these fields the mean density of spiders was about 10 individuals/0.25m2during the rice growing season, and thre families including Lycosidae, Tetragnathidae and Linyphiidae were very abundant. The colonization of spiders occurred in early season and they showed rapid density increase in mid-season. They maintained the highest density to the late season and their density decreased at harvest season. In the years of the low rice pest occurrence, the disturbance effect on spider community by pesticides were less. Two dominant species, Pirata subpiraticus and Pachygnatha clerki, had different population dynamics; Pirata subpiraticus showed the rapid density increase in the mid-July, and most of them remained immature stages, however, in the case of Pachygnatha clerki population, they rapidly increased in the late August and most of them remained adult stage during the late growing season. 본 연구는 1996년부터 1998년까지 경기도 화성시 발안 지역의 이앙재배한 논에서 발생하는 거미의 개체군 동태 및 군집자 료를 바탕으로 관행의 살충제 살포가 거미군집에 미치는 영향 을 분석하기 위해 수행되었다. 3년간 조사에서 조사 포장들에서거미군집은 연간 변이가 적은 안정된 발생을 보였으며, 발생밀 도에서 천적군의 90% 이상을 차지하는 최대 우점군이었다. 이지역의 벼 생육기간동안 단위면적당(0.25m2) 평균 거미밀도는 약 10마리 정도였으며, 늑대거미과(Lycosidae), 갈거미과(Tetragnathidae), 접시거미과(Linyphiidae)가 우점하였다. 거미군집의 밀도는 본답 초기에 벼의 이앙과 함께 이입으로 인해 형성되기 시 작하여 중기부터 급격한 밀도 증가를 보이며, 후기에 최고밀도를 유지하다가 수확시기에 밀도가 감소하는 패턴을 가졌다. 특히, 비래 해충의 발생이 적었던 해에는 관행적인 살충제 살포에 의한 거미군집의 교란 효과가 적게 나타났다. 우점종인 황산적거미와 턱거미는 다소 다른 개체군 동태를 가졌는데, 황산적거미는 7월 중순부터 밀도가 급격히 증가하고, 후기에는 성체보다는 유체 들의 발생비율이 높았던 반면, 턱거미는 8월 말부터 밀도가 급격히 증가하였고, 후기에 성체형태로 대부분 발견되었다.

해충관리 수준이 다른 이앙재배 논에서의 거미의 발생과 개체군 동태

박홍현,이준호,김승태,Park, Hong-Hyun,Lee, Joon-Ho,Kim, Seung-Tae 한국생태학회 2005 Journal of Ecology and Environment Vol.28 No.5

본 연구는 1996년부터 1998년까지 경기도 화성시 발안 지역의 이앙재배한 논에서 발생하는 거미의 개체군 동태 및 군집자료를 바탕으로 관행의 살충제 살포가 거미군집에 미치는 영향을 분석하기 위해 수행되었다. 3년간 조사에서 조사 포장들에서 거미군집은 연간 변이가 적은 안정된 발생을 보였으며, 발생밀도에서 천적군의 90% 이상을 차지하는 최대 우점군이었다. 이 지역의 벼 생육기간동안 단위면적당$(0.25m^2)$ 평균 거미밀도는 약 10마리 정도였으며, 늑대 거미과(Lycosidae), 갈거미과(Tetragnathidae), 접시거미과(Linyphiidae)가 우점하였다. 거미군집의 밀도는 본답 초기에 벼의 이앙과 함께 이입으로 인해 형성되기 시작하여 중기부터 급격한 밀도 증가를 보이며, 후기에 최고밀도를 유지하다가 수확시기에 밀도가 감소하는 패턴을 가졌다. 특히, 비래 해충의 발생이 적었던 해에는 관행적인 살충제 살포에 의한 거미군집의 교란 효과가 적게 나타났다. 우점종인 황산적거미와 턱거미는 다소 다른 개체군 동태를 가졌는데, 황산적거미는 7월 중순부터 밀도가 급격히 증가하고, 후기에는 성체보다는 유체들의 발생비율이 높았던 반면, 턱거미는 8월 말부터 밀도가 급격히 증가하였고, 후기에 성체형태로 대부분 발견되었다. This study was conducted to evaluate the effect of the conventional pesticide application system on the rice spider community based on the quantitative investigation of arthropod community in the rice fields in Saran area, Hwasung-si, Kyeonggi-do from 1996 to 1998. Spiders were the highest dominant group comprising over 90% of all natural enemies in their density, and showed very stable yearly occurrence. In these fiekds the mean density of spiders was about 10 individuals/$0.25m^2$ during the rice growing season, and three families including Lycosidae, Tetragnathidae and Linyphiidae were very abundant. The colonization of spiders occurred in early season and they showed rapid density increase in mid-season. They maintained the highest density to the late season and their density decreased at harvest season. In the years of the low rice pest occurrence, the disturbance effect on spider community by pesticides were less. Two dominant species, Pirata subpiraticus and Pachygnatha clerki, had different population dynamics; Pirata subpiraticus showed the rapid density increase in the mid-July, and most of them remained immature stages, however, in the case of Pachygnaths clerki population, they rapidly increased in the late August and most of them remained adult stage during the late growing season.

Objective Verification of Physiologic Changes during Accommodation under Binocular, Monocular, and Pinhole Conditions

박홍현,박인기,신재호,전연숙 대한의학회 2019 Journal of Korean medical science Vol.34 No.4

Background: To objectively investigate accommodative response to various refractive stimul in subjects with normal accommodation. Methods: This prospective, non-randomized clinical trial included 64 eyes of 32 subjects with a mean spherical equivalent −1.4 diopters (D). We evaluated changes in accommodative power, pupil diameter, astigmatic value, and axis when visual stimuli were applied to binocular, monocular (dominant eye, non-dominant eye, ipsilateral, and contralateral), and pinhole conditions. Visual stimuli were given at 0.25 D (4 m), 2 D (50 cm), 3 D (33 cm), and 4 D (25 cm) and accommodative response was evaluated using open view binocular autorefractor/keratometer. Results: The accommodative response to binocular stimulus was 90.9% of the actual refractive stimulus, while that of the monocular stimulus was 84.6%. The binocular stimulus induced a smaller pupil diameter than did the monocular stimulus. There was no difference in accommodative response between the dominant eye and non-dominant eye o between ipsilateral and contralateral stimuli. As the refractive stimuli became stronger, th absolute astigmatic value increased and the direction of the astigmatism axis became mor horizontal. Pinhole glasses required 10%–15% less accommodative power compared with the monocular condition. Conclusion: Binocular stimuli enable more precise and effective accommodation than do monocular stimuli. Accommodative response is composed of 90% true accommodation and 10% pseudo-accommodation, and the refractive stimulus in one eye affects the contralateral eye to the same extent. This should be taken into account when developing guidelines for wearing smart glasses while driving, as visual stimulation is applied to only one eye, but far distance attention is constantly needed.