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검색결과 1,170건 처리시간 0.031초

저온저장이 미끌애꽃노린재(Orius laevigatus)로와 칠레이리응애(Phytoseiulus persimilis)의 생물학적 특성에 미치는 영향 (Cold Storage Effect on the Biological Characteristics of Orius laevigatus (Fieber) (Hemiptera: Anthocoridae) and Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae))

  • 김정환;김황용;한만종;최만영;황석조;이미숙
    • 한국응용곤충학회지
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    • 제48권3호
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    • pp.361-368
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    • 2009
  • 미끌애꽃노린재와 칠레이리응애를 온도 6, 8, 10, $12{\pm}1^{\circ}C$, 습도 $70{\pm}10%$, 광주기 24시간 암조건에 저장하여 생존을, 산란수 등을 조사하였다. 미끌애꽃노린재 성충의 70% 생존율이 가장 높은 온도는 줄알락명나방 알을 제공한 $10^{\circ}C$로 저장기간은 36일이었다. 피장기간별 산란수는 $10^{\circ}C$$10{\sim}50$일까지 저장한 결과, $37.1{\sim}120.5$개로 무저장 산란수 224.5개 대비 산란율은 $16.5{\sim}53.7%$로 감소하였다. 칠레이리응애 성충의 생존율이 가장 높은 온도는 $8^{\circ}C$이다. 저장기간별 산란수는 $8^{\circ}C$에 점박이응애 알을 먹이로 제공하여 $7{\sim}42$일 저장한 결과, 산란수는 $11.9{\sim}18.9$개로 무저장 산란수 26.4개 대비 산란율은 $45.1{\sim}71.6%$로 감소하였다.

갈색여치(Paratlanticus ussuriensis)의 산란 특성 (Ovipositional Characteristics of the Ussur Brown Katydid, Paratlanticus ussuriensis (Orthoptera: Tettigoniidae))

  • 방혜선;나영은;한민수;김명현;노기안;이정택
    • 한국환경농학회지
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    • 제27권3호
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    • pp.274-278
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    • 2008
  • 최근 과수에 문제를 발생시키고 있는 갈색여치의 대발생 원인을 구명하기 위하여 갈색여치의 산란특성에 대한 연구를 수행하였다. 갈색여치는 실내실험에서 7월 초순부터 9월 초순까지 산란을 하며, 암컷 한 마리당 평균 145개의 알을 산란하였다. 일생 동안 산란하는 산란양의 54%를 산란 초기 2주 이내에 산란하였다. 평균 산란 깊이는 19.4 mm이었으며, 알의 크기는 산란 직후 장경이 약 5.7 mm, 단경이 2.0 mm이었다. 그러나 부화 직전의 알은 산란 직후 알 무게의 약 2배가량 증가하였다. 산란 배지 선호실험에서는 밭토양> 오아시스폼$^{(R)}$> 버미큘라이트 순으로 높은 산란 양을 보였다. 야외에서 산란장소는 성충이 서식한 과수원이 아닌, 수분이 유지되는 인근 야산 골짜기로 관찰되어, 겨울 동안의 토양온도와 습도가 알로 월동하는 갈색여치의 생존에 중요한 영향을 미칠 수 있는 요인으로 추정된다.

독일 고속철도 슬래브궤도의 고찰 (An Investigation on German High Speed Railway Slab Track)

  • 강보순
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2001년도 추계학술대회 논문집
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    • pp.508-513
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    • 2001
  • State of the German high speed railway slab track were investigated. The Permanent Way consisting of rails and sleepers laid on ballast is a technically and economically viable solution. After two decades of targeted research and development activities Slab Track turned out to be a reasonable option on special fields.

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Impact of Mating Duration on the Fecundity of the Newly Evolved Races

  • Mathur Vinod B.;Sarkar Kunal
    • International Journal of Industrial Entomology and Biomaterials
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    • 제12권2호
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    • pp.81-86
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    • 2006
  • Of all factors that govern productivity in sericulture, the role of silkworm egg is of prime importance. The production of silkworm seed involves a long chain of interdependent and highly specialized conditions. Female moths of Bombyx mori L. commence egg deposition immediately when the moths were decoupled. More than 60% of eggs are deposited within 4 hrs after decoupling i.e. 62.33% in CSR-3, 61.67% in CSR-6, 62.50% in CSR-16 and 63.28% in CSR-17. Almost 90% of eggs were laid in the first 12 hrs (93.13% in CSR-3, 90.81% in CSR-6, 89.71% in CSR-16 and 93.17% eggs in CSR-17) after decoupling. Almost 8 to 10% of more eggs were laid when oviposition period was prolonged upto 48 hrs instead of 24 hrs. The present investigation showed that a significant increase of 45 (8.34%), 50 (9.98%), 41 (8.26%) and 45 (8.30%) (P < 0.01) numbers of more eggs were found between 24 to 48 hrs (T6 to T9) in CSR-3, CSR-6, CSR-16 and CSR-17 races respectively. The findings of present investigation is very important for sericulture industry while producing layings to keep for different hibernation schedule especially for autumn/late autumn crop, female may be allowed for prolonged oviposition to get 8 -10% more eggs and farmer may fetch 8 -10 kg. more cocoon yield/l00 dfls with more income.

장대끈끈이주걱 분비모의 미세구조와 peroxidase 활성 (Ultrastructure and Activity Pattern of Peroxidase in Secretory Trichomes of Drosera capensis)

  • 김은수;오승은;유성철
    • Applied Microscopy
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    • 제28권3호
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    • pp.399-414
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    • 1998
  • Glandular trichomes present on the leaf surface of Drosera capensis were examined using transmission electron microscopy. A large number of stalked glands exist on the adaxial surfaces of the leaf blade. The secretory head is composed of two layers of secretory cells, one layer of middle cells, and the inner tracheids. The secretory cells contain rough endoplasmic reticulum, mitochondria, plastids, Golgi apparatus, and vacuoles. The secretory cells show prominent cell wall ingrowth, and thick cuticle restricted on the subcuticular wall. Frequently, the cuticle has some pores, canal-like structures, showing electron -dense granules being penetrated through them. Ultrastructural localization using diaminobenzidine showed the electron-dense deposits in the vacuole. No peroxidase activity was seen in the cell wall and cytolasm. The activity of peroxidase (POX) isozymes in Drosera which isoelectric point (pI) is 3.6 and some anionic POX isozymes which pIs are laid between 3.6 and 4.6 were especially increased according to the development and the formation of glandular trichomes. Also, the activity of some POX isozymes which isoelectric points are laid between 4.6 and 5.1 were increased in the regions of leaves which has trichomes.

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한국산 북방산개구리의 발생과정 (Life History of Rana temporaria dybowskii in Korea)

  • 윤일병;김종인;양서영
    • 환경생물
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    • 제17권4호
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    • pp.401-405
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    • 1999
  • 북방산개구리의 산란특성 및 발생과정을 연구하기 위하여 1998년 2월 중순에서 3월말까지 경기도, 경상북도, 강원도를 중심으로 남한의 전지역을 대상으로 표본을 채집하였다. 북방산개구리의 산란시기는 2월말에서 3월말사이에 주로 이루어지며, 산란장소는 정수지와 유수지를 모두 선택하나 유수지에 산란하는 경우 알의 형태는 뭉쳐진 불규칙한 공 모양으로 돌이나 수초와 같은 기질에 부착하며, 정수지의 경우 타원형의 계란모양을 이루고 기질에 부착하지 않는다. 발생과정은 산란 후 일주일이 지나면 대부분 부화하고 71일이 경과하면 전 발생과정을 완료한다. 발생과정이 비교적 짧은 것은 먹이원이 풍부한 계절에 적극적인 포식활동을 위한 것으로 판단된다.

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Effect of Microsporidian Infection on Reproductive Potentiality on Mulberry Silkworm, Bombyx mori L. (Lepidoptera: Bombycidae) in Different Seasons

  • Chakrabarti, Satadal;Manna, Buddhadeb
    • International Journal of Industrial Entomology and Biomaterials
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    • 제17권1호
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    • pp.157-163
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    • 2008
  • Infection of pathogenic microsporidia, Nosema bombycis and Nosema mylitta (Chakrabarti and Manna, 2006) decreased egg production, fecundity, hatching % and increased sterile eggs in heavily infected mulberry silkmoth, Bombyx mori L. On an average a disease free moth laid upto 442.67 eggs with high hatching % (99.53) and less sterile eggs ($0.47{\sim}2.00%$). While an infected moth laid less number of eggs ($7.00{\sim}412.00$) with low hatching % ($32.437{\sim}98.643$) and high sterile eggs ($2.143{\sim}129.571$). Fecundity of disease free laying was highest (468.714) during season-1 then gradually decreased during season- 2 (414.000) to season- 3 (404.285). But fecundity of an infected laying was highest during season-2 and hatched eggs were lowest during season-2. Higher inoculums concentration of N. mylitta infected to 5th stage larva of mulberry silkworm drastically decreased the fecundity in season - 3 and lower inoculums concentration of N. bombycis decreased the fecundity in season-1 and 3. Season-3 was most effective season to decrease the fecundity and increase sterile eggs when both temperature and humidity were fluctuated from the optimum level.