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      • KCI등재

        전남북지역 휴경논의 식생 및 곤충상

        백채훈,이건휘,강종국,전용균,최만영,서홍렬 한국응용곤충학회 2009 한국응용곤충학회지 Vol.48 No.3

        A study was conducted to find out plant flora, the occurrence of insect pests and natural enemies in the fallow paddy fields of Jeonnam and Jeonbuk provinces from 2004 to 2005. They were identified as 124 plant species in 32 families, 58 insect pest species in 30 families and 11 natural enemy species in 9 families. Plant species belonging to Poaceae and Asteraceae were founded as 28 and 18 species, respectively, and dominated significantly among plants growing in the fallow paddy fields. In insect pests, Conocephalus chinensis, Nysius plebejus, Cletus punctiger, Eysarcoris aeneus, Nephotettix cincticeps, Laodelphax striatellus and Tipula sp. occurred significantly in the fallow paddy fields. Among them, occurrences of N. cincticeps and L. striatellus were low from May to June, and that of L. striatellus was high in August and September. In insect natural enemies, Coenagrion sp., Harmonia axyridis, Propylea japonica and Eristalis tenax occurred significantly in the fallow paddy fields.

      • SCOPUSKCI등재

        긴털이리응애와 점박이응애, 차응애에 대한 Flufenoxuron의 선택 독성

        백채훈,김상수 한국곤충학회 1996 Entomological Research Vol.26 No.1

        긴털이리응애와 점박이응애, 차응애에 대하여 flufenoxuron의 독성을 비교하기 위하여 농도별로 침적한 leaf disc에 각 응애 종의 자성충과 난을 접종하여 시험한 결과, flufenoxuron은 점박이응애와 차응애보다 긴털이리응애에 대하여 독성이 매우 낮았다. 긴털이리응애 자성충은 처리 농도가 증가하여도 생존율에 별 영향을 받지 않아 12.5~100 ppm에서 88~96%가 생존하였으며, 산란수도 처리 농도간에 큰 차이가 없었다. 모든 처리 농도에서 긴털이리응애 난의 부화나 생존 유.약충의 발육에는 영향이 없었다. 유.약충의 생존율은 농도증가에 따라 감소하였으나 12.5~100 ppm에서 44~92%가 성충으로 우화하였다. 중독된 먹이를 섭식한 긴털이리응애 자성충은 생존율, 산란수와 차세대의 성비에 큰 영향을 받지 않았다. 또한 긴털이리응애에 상대적으로 영향이 적어 아치사농도라 할 수 있는 12.5~25 ppm에서의 flufenoxuron은 점박이응애나 차응애의 종합관리에서 긴털이리응애와 식식성응애류의 밀도비율 조절에 유용할 것으로 사료된다. The relative toxicity of flufenoxuron to the predatory mite, Ambiyseius womersleyi and the spider mites, Tetranychus urticae and T. kanzawai was evaluated. Adult females and eggs of three species were placed on bean leaf discs dipped in several concentrations of flufenoxuron. Flufenoxuron was much less toxic to A. womersleyi than to the spider mites. At concentrations of 12.5∼100 ppm, flufenoxuron did not significantly affect the Survival of A. womersleyi. At the above concentrations, 88∼96% of adult female predators remained alive, Moreover, reproduction was not significantly reduced at any of the concentrations tested. Flufenoxuron did not affect the hatch of A. womersleyi eggs or the development of surviving immature predators. Survival of immature predators decreased with increasing flufenoxuron concentration. However, 44∼92% of immature predators reached adulthood at 12.5∼100 ppm. Adult female predators survived on a diet of twos-potted spider mites intoxicated with flufenoxuron, and their fecundity and the sex-ratio of the progeny were not significantly affected. Flufenoxuron at selective sublethal concentrations (12.5∼25 ppm) could be of value in adjusting predator/prey ratio in integrated management of the spider mites.

      • KCI등재

        긴털이리응애와 점박이응애에 대한 Fenpyroximate의 독성 비교

        백채훈,김상수 한국응용곤충학회 1996 한국응용곤충학회지 Vol.35 No.3

        긴털이리응애와 점박이응애에 대한 fenpyroximate의 독성에 비교하기 위하여 농도별로 처리한 강남콩 엽편에 두 종의 자성충과 난을 접종하여 시험한 결과, fenpyroximate는 점박이응애보다 긴털이리응애에 대하여 독성이 매우 낮았다. 긴털이리응애 자성충은 처리 농도가 증가함에 따라 생존율이 감소하였으나 6.25~50ppm에서 58~74%가 생존하였으며, 산란수는 처리농도 간에 큰 차이가 없었다. 점박이응애 자성충은 6.25~50ppm에서 32~40%가 잔존하였지만 모두 활동불능되었으며, 산란수도 처리농도가 높을수록 감소하였다. 모든 처리농도에서 긴털이리응애 난의 부화나 생존한 유.약충의 발육에는 영향이 없었다. 긴털이리응애 유.약충의 생존율은 농도증가에 따라 감소하였으나 6.25~50ppm에서 16~48%가 성충으로 우화하였다. 그러나 점박이응애의 경우는 6.25~50ppm에서 성충태에 이른 개체가 전혀 없었다. 중독된 먹이를 섭식한 긴털이리응애 자성충은 생존율과 산란수 및 차세대의 성비에 실질적인 변화가 없었다. 또한 긴털이리응애에 상대적으로 영향이 적어 아치사농도라 할 수 있는 6.25~12.5ppm의 농도는 점박이응애의 종합관리에서 긴텅이리응애와 점박이응애의 밀도비율을 조절하는데 유용할 것으로 생각된다. The selective tox\ulcornercity of fenpyroximate to the predatory mite Amblyseius womersleyi and the twospotted spider mite Tetranychus urticae was evaluated. Adult females and eggs of both species were placed on bean leaf dis~sd ipped in several concentrations of fenpyroximate. Fenpyroximate was much less toxic to A. womersleyi than to T. urticae. Although the survival of adult females of A. womersleyi tended to decrease with increasing fenpyroximate concentration, 58-74% of predators remained alive at concentrations of 6.25-50 ppm. However, reproduction of predators was not significantly reduced at any of the concentrations tested. At 6.25-50 ppm, 32-40% of twospotted spider mite adult females survived but all survivors were immobilized. Moreover, reproduction of twospotted spider mites was reduced with increasing fenpyroximate concentration. Fenpyroximate did not affect the hatch of A. womersleyi eggs or the development of immature predators. Although survival of immature predators decreased with increasing fenpyroximate concentration, 16-48% of immature predators reached adulthood at 6.25-50 ppm. However, all immature spider mites failed to develop to adulthood at 6.25-50 ppm. Adult female predators survived on a diet of twospotted spider mites intoxicated with fenpyroximate, and their fecundity and sex-ratio of the progeny were not substantially affected. Fenpyroximate at selective sublethal concentrations (6.25-12.5 ppm), therefore, could be of value in adjusting predatorlprey ratio in integrated management of twospotted spider mites.

      • 최근 벼 주요해충 발생양상 및 피해

        백채훈 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.10

        벼를 가해하는 국내 해충은 약 140여종이 알려져 있다. 이와 같은 해충은 지역에 따라 혹은 해에 따라 발생량이 다르기 때문에 일정 지역 내에서 방제가 필요한 해충은 20여 종에 불과하다. 최근 기후변화, 벼 품종 및 작부체계의 변화 등 농업생태계 변화에 따라 벼 해충의 발생양상과 피해가 달라지고 있다. 이러한 대표적인 해충이 이화명나방(Chilo suppressalis)과 벼 노린재(Rice stink bug) 이다. 최근 전북지역을 중심으로 전국적으로 이화명나방의 발생량 및 피해가 점증되고 있고, 유충의 발생밀도가 높고 피해경률이 높아 수량감소의 원인이 되고 있다. 특히, 피해가 심한 포장은 줄기 당 10∼15마리의 유충이 발생하였고, 피해경률이 10∼20% 까지 피해가 심하였다. 2화기 유충의 피해유형도 변화되고 있다. 지금까지 2화기 피해는 백수현상으로만 알려져 있는데, 최근에는 백수현상 보다는 벼 줄기에 구멍을 뚫고 다니면서 줄기 내부를 먹어 태풍이나 바람에 의해 줄기가 부러지는 현상을 보이고 있어, 멀리서 보면 마치 벼멸구에 의한 집단고사(hopperburn) 현상과 비슷한 경향을 보이고 있다. 그리고 이화명나방의 발생최성기가 빨라지고 있다. 지금까지 알려진 1화기 성충의 발생최성기는 6월 상순이었지만 최근에는 5월 하순으로 약 10일 정도 빨라지고 있고, 더불어 2화기 성충의 발생최성기도 8월 중순에서 상순으로 지역에 따라 약간의 차이가 있지만 전반적으로 빨라지고 있다. 또한 벼 품종의 다양성과 추석 전 조기수확을 위한 벼 이앙시기의 변화에 따라 노린재의 발생 및 피해가 증가하고 있다. 벼 노린재는 논 주변의 잡초에서 서식하다 벼의 출수기에 맞추어 이동한다. 일부 농가에서 추석 전 조기수확을 위해 경제성이 높은 찰벼를 조기이앙 재배로 인해 노린재의 피해가 발생되고 있다. 특히, 찰벼 재배지역에 발생하는 주요 노린재는 시골가시허리노린재(Cletus punctiger) 등 12종이고, 피해증상으로 반점미가 발생하였다.

      • KCI등재

        고구마 재배지 주요 굼벵이 발생양상 및 피해

        백채훈,이건휘,최만영,김두호,최동로,서홍렬 한국응용곤충학회 2007 한국응용곤충학회지 Vol.46 No.1

        This experiment was conducted to investigate population dynamics of white grubs and its damages in sweet potato fields. There were three species of white grubs that fed on the roots of sweet potato in Honam area. Among them, Holotrichia parallela was a major insect pest. Damage rate of sweet potato by white grubs were about 2 to 40% differed with regions. In some region where it was severe the damage rate of sweet potato was about 80% or more. H. parallela overwintered as a late 3rd instar larvae in soil from late October to late-June, and the survival rate of them was 92%. The occurrence pattern of H. parallela larvae varied in different seasons. In sweet potato field, H. parallela larvae populations started being observed during late-July to mid.-August. The damage by the grub began to occur late-August in field and lasted to the harvest time.

      • KCI등재

        벼 시골가시허리노린재, 우리가시허리노린재의 온도별 발육 및 산란반응

        백채훈,최만영,서홍렬,김재덕 한국응용곤충학회 2007 한국응용곤충학회지 Vol.46 No.1

        The two species of rice bugs causing pecky rice, Cletus punctiger and Cletus schmidti are often observed coexisting in the rice fields of nearby fallow land. Direct feeding damage to rice by C. punctiger and C. schmidti can lead to a reduction in grain quality and quantity. These studies were carried out to investigate the development of C. punctiger and C. schmidti at various constant temperatures ranging from 20 to 30℃, 65% RH, and a photoperiod of 16L:8D. Egg hatchability of C. punctiger/C. schmidti at the temperatures of 20, 25 and 30℃ were 80.6/88.0, 91.7/96.3, 96.4/96.2 %, respectively. The development periods of eggs of C. punctiger/C. schmidti at the temperatures of 20, 25, and 30℃ were 16.4/18.4, 9.4/10.2 and 6.4/7.3 days, respectively. Mean developmental periods of lst, 2nd, 3rd, 4th and 5th nymphs of C. punctiger/C. schmidti at 30℃ were 2.1/2.0, 3.5/4.0, 3.3/5.6, 3.2/4.8 and 5.8/6.9 days, respectively. Oviposition began 8.1 days after emergence at 25℃, and the longevity of female and male were 120.0 and 117.3 days, respectively. Total number of eggs through the life of female were 245.5 laying 2.2 eggs a day in average at 25℃. The development periods of egg and nymphs of C. punctiger were relatively shorter than those of C. schmidti. Availability of male had affected the egg hatchability greatly that laid at 30th day after 60 days period of oviposition in the presence of adult male of C. punctiger. The fertile eggs laid by the female together with male was 92.1% but those without male was only 9.6%.

      • KCI등재

        호남지역 콩 재배지 주요해충 및 천적류

        백채훈,이건휘,최만영,서홍렬,김두호,황창연,김상수 한국응용곤충학회 2007 한국응용곤충학회지 Vol.46 No.2

        This survey was conducted to illustrate insect pests and their natural enemies in soybean fields in Honam area. A total of 23 pest species in 13 families and 13 species of natural enemy were observed during 2002 to 2003. Delia platura, Medythia nigrobilineata, Spodoptera exigua and Aphis glycines occurred relatively with high population densities during the early growth stage of soybean. Dolycoris baccarum, Riptortus clavatus, Nezara antennata, Piezodorus hybneri and Halyomorpha halys began to occur between mid July to early August and lasted until the harvest time. Lepidopteran insect pests, Leguminivora glycinivorella, Pleuroptya ruralis, Scopula missaria, Macdunnoughia purissima and Spodoptera litura occurred significantly in late August in soybean field. Natural enemies of soybean insect pests observed in this survey were seven parasitoids, five predators, and an entomopahogenic fungus. Two egg parasitoid species for R. clavatus, two parasitoid species for P. ruralis, and five natural enemy species (including parasite, predator and entomopathogenic fungi) for either S. litura or A. glycines were identified, respectively. Among them two egg parasitoid species, Gryon japonicum and Ooenyrtus nezarae for R. clavatus, for and one parasitoid species for P. ruralis, that belong to Betbylidae, were new to Korea.

      • KCI등재

        벼 혹명나방(Cnaphalocrocis medinalis)의 경제적 피해수준

        이건휘,백채훈,최만영,서홍렬,배순도,최용수 한국응용곤충학회 2006 한국응용곤충학회지 Vol.45 No.3

        This study was carried out to determine the economic injury level of the rice leaffolder, Cnaphalocrocis medinalis G.. The damage aspects of rice plant (at tilling stage) by leaf folders at different larval density per plant were studied in pot experiment (24 ㎝ in diameter, 18 ㎝ in height). One leaf folder consumed 6-7 leaves during larval stage. The damage by leaf folders was simulated by cutting off 0, 10, 30, 50, 70, and 90% of leaves before and after heading stage July 15th (at panicle initiation stage) and August 15th (at milk stage), respectively. When leaves were cut before the heading of rice, the linear relationships between the leaf cutting rate (X) and each factors of yield (Y) were as following, for grain maturity it was Y = -9.379X + 83.630 (R² = 0.493), Y = 0.139X + 0.490 (R² = 0.925) for yield, and Y = -4.880X + 81.116 (R² = 0.665) for head rice. When leaves were cut after the beading of rice, it was Y = -23.014X + 83.589 (R² = 0.915) for grain maturity, Y = 0.141X + 3.466 (R² = 0.842) for yield, and Y = -13.795X + 81.964 (R² = 0.898) for head rice. We found that when leaf cutting after the heading stage caused more damage than before the heading in terms of yield and yield components. Based on theses results the economic threshold level was estimated to be 30% and 7% leaf loss before and after heading stage.

      • KCI등재

        애꽃노린재(Orius sauteri)발육, 성충수명 및 산란에 미치는 먹이의 영향

        백채훈,황창연,이건휘,김두호,최만영,나승용,김상수 한국응용곤충학회 2003 한국응용곤충학회지 Vol.42 No.1

        27 항온조건(60-70% RH, 16L : 8D)에서 꽃노랑총채벌레(Frankliniella occidentalis) 2령유충, 목화진딧물(Aphis gossypii) 1-2령 약충, 점박이응애(Tetranychus urticae) 난을 먹이충으로 공급하였을 때, 애꽃노린재의 발육, 생존율, 성충수명과 산란수를 조사하였다. 암/수별 약충의 발육기간은 각각 12.2/12.8, 13.0/13.2, 17.9/17.8일로, 꽃노랑총채벌레 2령 유충을 먹이로 공급하였을 경우 가장 짧았다. 애꽃노린재 약충 기간동안 생존율은 각각 96.4, 78.4, 73.8%3-꽃노랑총채벌레 2령 유충을 먹이로 공급하였을 경우 가장 높았다. 암/수의 성충수명은 각각 55.9/51.0, 30.2/30.8, 25.8/ 25.1일로 꽃노랑총채벌레의 2령을 먹이로 공급하였을 경우 가장 길었으며, 암컷 성충의 일일산란 수는 각각 5.6, 4.1및 1.9개였다. 꽃노랑총채벌레를 먹이로 공급하였을 때 애꽃노린재는 우화 후 3-4일 경부터 산란을 시작하여 20-40일 사이에 가장 많이 산란하였고, 일일평균 최대산란수는 7-8 개였다. Anthocorid bugs (Orius spp.) are known as polyphagous predators preying on thrips, aphids, mites, eggs of small insects and whiteflies. This study was conducted to investigate the nym-phal development, survival rate, longevity of Orius sauteri adult and oviposition, when nymphs of western flower thrips (Frankliniella occidentalis) and cotton aphid (Aphis gossypii), and eggs of two-spotted spider mite (Tetranychus uritcae) were fed as diets. Nymphal development of female/male O. sauferi fed with F. occidentalis, A. gossypii and T urticae took 12.2/12.8, 13.0/l3.2, and 17.9/17.8 days at 27, respectively, Survival rates during nymphal development were 96.4, 78.4, 73.8%, longevity of female/male adults were 55.9/51.0, 30.2/30.8, and 25.8/25.1 days, and daily oviposition were 5.6, 4.1, and 1.9 eggs, respectively. Oviposition of O. sauteri fed with F. occidentalis usually began 3-4 days after emergence at 27, and reached at its peak of 7-8 eggs female day 20-40 days after emergence

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