• 제목/요약/키워드: Soil insect pests

검색결과 62건 처리시간 0.021초

Newly Recorded Noctuid Pest, Leucapamea askoldis (Lepidoptera: Noctuidae) from Amur Silver Grass, Miscanthus sacchariflorus

  • Jung, Young Hak;You, Eun Ju;Ahn, Jong-Woong;Park, Jung-Joon;Choo, Young- Moo;Choo, Ho Yul;Lee, Dong Woon
    • Weed & Turfgrass Science
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    • 제6권4호
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    • pp.355-358
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    • 2017
  • Amur silver grass, Miscanthus sacchariflorus is one of the promising biofuel weeds. A damage of noctuid pest, Leucapamea askoldis was firstly observed from Amur silver grass in Hwasun silver grass plantation during the survey of insect pests of Amur silver grass in Iksan, Hwasun, and Sancheong plantation areas in Korea. The host of L. askoldis was not known yet in Korea. The L. askoldis damage was observed as larval feeding on newly grown shoots and roots of M. sacchariflorus close to soil surface from early May in 2013. Investigated larval density was $1.6{\pm}1.1per\;m^2$ on April 4 and damage rate of shoots was $0.8{\pm}0.4%$ on May 4, 2013. The larvae bore into shoots of M. sacchariflorus and feed on the inside of plant. The damaged shoots are easily pulled out and distinguished by the boring hole on the shoots. L. askoldis was potential insect pest in M. sacchariflorus plantation areas.

균근연구(菌根硏究)의 농림업(農林業)에의 응용(應用) (Application of Mycorrhizal Research to Agriculture and Forestry)

  • 이경준;이돈구;이원규;구창덕
    • 한국산림과학회지
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    • 제59권1호
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    • pp.121-142
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    • 1983
  • Recently mycorrhizal research has been one of the most fast-growing research areas in modern plant science and microbiology. The application potential of mycorrhizal techniques to agriculture and forestry is enormous in view of the ubiquitous nature of mycorrhizae and known benefits of mycorrhizae to host plants. Unfortunately, very few scientists in Korea are currently involved in mycorrhizal research. When a team of American plant pathologists visited Korea in September 1982 to participate in the Korea-U.S.A. Joint Seminar on Forest Diseases and Insect Pests, they were surprised by the principal author's statement that there was no single research project on mycorrhizae sponsored by Korean government or any scientific institutions. The author initiated a few years ago a research project on the ecology of tree mycorrhizae with a foreign financial support. Major areas of interest were survey of ectomycorrhizae in relation to soil fertility, taxonomic distribution of mycorrhizae among woody plants, identification of ectomycorrhizal fungi, and growth response of woody plants to artificial inoculation. In spite of the enormous application potential of mycorrhizae to agronomic plants, the subject of mycorrhizae has not been recognized by Korean agronomists, foresters or pathologists. The purpose of this review rather written in Korean is to introduce the techniques of mycorrhizal research to Korean scientists and to urge them to participate in challenging new scientific field which might bring us a remarkable increase in crop productivity and tree growth through manipulation of this unique symbiosis. In this review, following topics were discussed in the same order: introduction; brief history of mycorrhizal research; morphology and classification of mycorrhizae; distribution of mycorrhizae in plant kingdom and in soil profile; physiology of mycorrhizae (functions, mineral nutrition, mycorrhizal formation); interaction of mycorrhizae with soil-born plant pathogens. mycorrhizae in nitrogen-fixing plants; application of mycorrhizal techniques to nursery practices (isolation, culture, inoculation, and response); prospect in the future.

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고구마의 수확 후 관리현황과 개선방안 (Postharvest Procedures on Storage, Management and Utilization of Sweetpotato)

  • 안영섭;정병춘;이준설;정미남;김학신
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2004년도 추계학술발표회
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    • pp.36-41
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    • 2004
  • Postharvest handling of sweetpotatoes is inevitable procedure for the maintenance, storage, management and utilization of high fresh quality of storage roots. It ranges in degree from simple lifting of roots, carrying them from field to storage house and immediate consumption after cooking, to sophisticated methods of curing, and storage under controlled conditions followed by processing into a high quality food products. Postharvest saleability, quality and nutritional value of roots and the presence or absence in roots of bitter, toxic furanoterpenoid phytoalexins or mycotoxins depends greatly on the degree and types of treatment to which produce is subjected. Climatic and soil conditions before harvest and contamination or attack by microorganisms or insect pests in the field may initiate or enhance subsequent postharvest deterioration. Careless postharvest handling can lead to both quantitative and qualitative losses which may be extremely high in some circumstances. Research has concentrated on the improvement of preharvest conditions to increase yield and lower decrease rates. However, such efforts are wasted unless they go hand in hand with others designed to reduce the high degree of loss associated with careless postharvest handling.

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Single Somatic Embryogenesis from Transformant with Proteinase II Gene in Panax ginseng C.A. Meyer

  • Yang, Deok-Chun;Kim, Se-Young;Rho, Yeong-Deok;Kim, Moo-Sung
    • Plant Resources
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    • 제6권3호
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    • pp.205-210
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    • 2003
  • Ginseng(Panax ginseng C.A. Meyer) is a perennial herbaceous plant which grows very slowly. It takes about 3 to 4 years from seeding to collecting the ripe seeds and the ginseng propagation is very difficult. and so, it is very difficult to breed ginseng plant. Ginseng tissue culture was started from at 1960, and ginseng commercial product by in vitro callus culture was saled, however upto now, regenerants were not planted to soil normally. Recently, plant genetic engineering to produce transgenic plants by introducing useful genes has been advanced greatly. In a present paper, transformation of ginseng plants was achieved by co-cultivation with Agrobacterium harboring the binary vector coding Proteinase-II gene, which confer resistant or tolerant to insect pests, The binary vector for transformation was constructed with disarmed Ti-plasmid and with double 35S promoter. The NPT II gene and introduced genes of the transgenic ginseng plants were successfully identified by the PCR. Especially the transgenic ginseng plants were regenerated using new techniques such as repetitive single somatic embryogenesis.

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소나무재선충에 대한 방선균 균주의 살선충 및 증식억제 효과 (Nematicidal and Reproduction Supression Activity of Actinomyces Isolates against Pine Wood Nematode, Bursaphelenchus xylophilus)

  • 이채민;임태헌;이상명;문일성;한상섭;이동운
    • 농약과학회지
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    • 제19권2호
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    • pp.141-150
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    • 2015
  • 우리나라의 소나무림에 만연되어 있는 소나무재선충에 대한 살선충 및 증식억제 활성을 우리나라 산림토양으로부터 분리 한 방선균을 이용하여 수행하였다. 우리나라 산림토양에서 분리 된 32개의 방선균 균주들 중 21개 균주의 2배 배양여액에서 소나무재선충에 대한 보정사충율이 90% 이상을 나타내었다. 방선균들 중 AM210, SG16, YD116, YD315 균주의 병원성이 가장 높았으며 YD116 균주는 분자생물학적, 형태적 특성 조사결과 Streptomyces atratus로 동정되었다. S. atratus로부터 몇 가지 활성 물질들이 알려져 있으며 그들 중 세포독성을 가지는 hydrazidomycin과 유사한 hydrazine hydrate를 이용하여 소나무재선충에 대한 살선충 활성을 검정하였다. 10 ppm 농도의 hydrazine hydrate는 소나무재선충에 대하여 60.8%의 보정사충율을 보였다. S. atratus YD116 균주의 실용화를 위한 부가적인 연구가 필요할 것이다.

토마토 온실에서 방충망 설치에 의한 담배가루이 피해 경감 (Establishment of 60 Mesh Nets to Reduce Crop Loss by Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) in Tomato Greenhouse)

  • 정부근;이흥수;김영봉
    • 한국응용곤충학회지
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    • 제52권1호
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    • pp.23-27
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    • 2013
  • 담배가루이가 매개하는 토마토황화잎말림병(TYLCV) 예방을 목적으로 해충의 유입을 원천적으로 차단할 수 있는 방충망 설치에 대한 연구가 수행되었다. 담배가루이가 60메쉬망을 통과는 할 수 있지만, 83메쉬 이상의 방충망으로 완전히 차단할 수 있었다. 담배가루이의 온실 내 유입을 차단하기 위한 3연동 온실($21.0{\times}18.3m$)에 60메쉬 망실, $5.65(W){\times}2.05(H){\times}18.45(L)(m)$을 별도로 설치하였다. 60메쉬 망실 내에서 담배가루이 산란과 아메리카잎굴파리 가해흔적이 출입문 쪽에 국부적으로 몇몇 발견되었으나, 토마토황화잎말림병에 걸린 토마토는 없었다. 토마토의 초장, 엽장, 엽폭, 화방수, 당도 조사결과 망실유무에 따른 처리구간의 차이는 없는 것으로 나타났고, 수량에서도 유의성 있는 차이를 발견할 수 없었다. 실용적인 관점에서 방충망의 설치는 유리온실이나 장기간 사용가능한 비닐온실 등의 측창과 천창 및 출입구에 설치할 경우 유망할 것으로 생각되었다.

국내 흰개미(Reticulitermes speratus kyushuensis Morimoto)에 의한 토양의 화학적 특성 변화 (Changes in Chemical Property of Soil Affected by Termites (Reticulitermes speratus kyushuensis Morimoto) in Korea)

  • 성세하;김근기;홍창오;박현철
    • 한국환경과학회지
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    • 제26권6호
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    • pp.789-795
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    • 2017
  • Termites (Isoptera) are classified into approximately 3,106 species. In Korea, only one species has been identified, which is Reticulitermes speratus kyushuensis Morimoto. The termite, a social insect, is known to play an important role in nutrient cycling of the ecosystem, although some species of termites are well-known pests attacking wooden structures or any plant materials. However, there is a lack of research about termites in Korea, including aspects such the taxonomy, physiology, and ecology of termites. This study was carried out to provide valuable basic data on the ecological role of termites in an ecosystem in Korea for the future studies. For the experiments, soil and termite samples were randomly collected from Mt. Hwajang located in Jikdong-ri, Eonyang-eup, Ulju-gun, Korea between October 5 and 30, 2015. Analysis results showed that there were no significant differences in soil chemical properties between the soil samples just after air-drying and one year elapsed without any treatment. The treated soil with termites showed significantly higher than the soil without termite treatment. Chemical properties of total nitrogen, organic matter, available phosphate, pH, Calcium(Ca), Potassium(K) and Magnesium(Mg) in soil treated with termites were $1.11{\pm}0.3gkg^{-1}$, $43.3{\pm}12.4gkg^{-1}$, $27.4{\pm}2.9mgkg^{-1}$, $4.56{\pm}0.2$, $0.82{\pm}0.2cmol_ckg^{-1}$, $3.18{\pm}1.4cmol_ckg^{-1}$, $1.73{\pm}1.1cmol_ckg^{-1}$, respectively. The values of soil property of without termite treatment were $0.56{\pm}0.1gkg^{-1}$, $30.5{\pm}3.1gkg^{-1}$, $24.0{\pm}4.7 mgkg^{-1}$, $4.09{\pm}0.1$, $0.71{\pm}0.2cmol_ckg^{-1}$, $2.88{\pm}1.5cmol_ckg^{-1}$, $1.30{\pm}0.7cmol_ckg^{-1}$, respectively. These results suggest that inhabitation of termites could improve soil chemical properties in an ecosystem.

Accumulation of Heavy Metals in Soil Growing for Red Pepper (Capsicum annuum) with using Lime Bordeaux and Lime Sulphur Mixture

  • Lee, Hyun Ho;Kim, Keun Ki;Lee, Yong Bok;Kwak, Youn Sig;Ko, Byong Gu;Lee, Sang Beom;Shim, Chang Ki;Hong, Chang Oh
    • 한국토양비료학회지
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    • 제50권4호
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    • pp.318-324
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    • 2017
  • Lime bordeaux mixture (LBM) and lime sulfur mixture (LSM) are representative environmental friendly organic materials for prevention of insect pests in South Korea. Recently, those have been widely used as an alternative for chemical pesticides in eco-friendly farms. However, South Korea has not established even recommendation of LBM and LSM considering the stability of heavy metals in soil. The aim of this study was to evaluate the accumulation of hazardous heavy metals in soil and plant with long-term application of LBM and LSM. Firstly, we investigated the amount of LBM and LSM used per year in several eco-friendly farms to determine a standard application rate of both materials. The pepper plant was grown on the pot in greenhouse for 14 weeks. Both materials were applied at 0, 1, 3, and 9 times of standard application rates (2.56 and $1.28L\;ha^{-1}$ of LBM and LSM per year, respectively). Dry matter yield of pepper and heavy metals (As, Cd, Cu, Hg, Ni, Pb, and Zn) concentration in soil and pepper plant were measured after 14 weeks. Yield of pepper plant did not significantly chang with up to application rate of 1 times, thereafter it markedly decreased with more than 3 times. With increasing LBM and LSM application, the concentration of Cu and Zn in soil significantly increased. Especially, Zn concentration in pepper significantly increased with increasing application rates of both materials. This might resulted in significant decrease in dry matter yield of pepper. The concentrations of those heavy metals in soil did not exceed safety levels ($150mg\;kg^{-1}$ for Cu and $300mg\;kg^{-1}$ for Zn) established by the Korean Soil Environmental Conservation Act as well as concentration of heavy metals in pepper plant by Korean Ministry of Food and Drug Safety. However, particular attention should be paid for heavy metal safety and crop productivity when using LBM and LSM in the organic farm.

미나리 유기재배를 위한 활용자재 시용효과 (Applications of Agro-Based Materials for Water Dropwort (Oenanthe stolonifera DC) Organic Farming)

  • 안병구;문영훈;권영립;이진호
    • 한국유기농업학회지
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    • 제18권1호
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    • pp.83-92
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    • 2010
  • 미나리 유기재배 방법을 설정하기 위해 관행 재배구를 대조구로 하고 유용미생물제(effective microorganism), 액상규산염(silicate solution), 및 유기액상비료(organic liquid fertilizer)를 사용하여 재배하였다. 미나리 수확기에 조사한 토양 pH, EC, OM, 유효인산, 치환성 칼슘, 유효규산함량은 수확기에 감소하였고, 치환성칼륨과 마그네슘은 1, 2년차에는 수확기에 감소하였지만, 3년차에는 증가하였다. 대조구에 비해 액상규산염을 사용할 경우 pH, 유기물, 유효인산함량이 감소하였고, 유용미생물제는 치환성 Ca과 Mg, 유기액상비료는 EC와 치환성 Ca과 K가 감소하였다. 미나리에 함유되어 있는 다량원소 가운데 C, N, P, K, 및 S는 대조구보다 함유량이 많았고, Ca과 Mg은 대조구와 비슷하였다. 담배거세미나방과 역병은 모든 처리구에서 비슷한 수준으로 나타났고, 점무늬병은 대조구에서 나타났다. 생육시기별로 처리간에 엽록소 함량 차이는 없었지만, 액상규산염을 사용한 구의 초장은 60.2 cm, 수량 3,698 kg/10a로 가장 적었고, 유기액상비료를 사용한 경우 66.0 cm와 4,387 kg/10a로 가장 많았다.

국화의 GM 이벤트 선발을 위한 실질적 동등성 및 환경위해성 평가 (Assessment of Substantial Equivalence and Environmental Risk for Event Selection of Genetically Modified Chrysanthemum)

  • 임진희;심명선;오권헌;서지연;이수영;박상근;신학기;조명래
    • 원예과학기술지
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    • 제32권4호
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    • pp.517-524
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    • 2014
  • 본 연구는 국내에서 개발된 국화의 GM 이벤트에 대한 실질적 동등성과 환경 위해성 평가를 위해 GM 화훼류 이벤트의 표현형, 생육 및 개화특성 등의 재배적 특성과 병해충의 발달 정도 및 토양미생물의 변화양상 등이 조사되었다. 무측지성 GM 국화의 시험재료로는 무측지성 국화 형질전환체인 LeLS69, LeLS76, LeLS80 등 3계통을 이용하였으며, 대조품종 'Jinba'와 비교 분석하였다. 무측지성 GM 국화의 표현형 검정을 위해 각 계통간 무측지성 발생 정도를 비교하였으며, 재배적 특성 검정을 위해 생육단계별 생육정도 및 개화 특성을 비교하였다. GM 국화의 생리장해 및 병해충 발생 정도를 정식 후 매주 조사하여 변화양상에 대해 분석하였다. 또한 토양 미생물의 변화를 보기 위해 실험 종료시 GM 국화 계통별로 뿌리와 밀접한 부위의 토양을 채취하여 세균, 방선균, 사상균의 발생 정도를 분석하였다. LeLS80은 대조구 'Jinba'에 비해서 무측지성의 발현도가 높은 것을 확인할 수 있었으나, LeLS76과 LeLS69는 무측지성의 발현률이 현저히 낮았다. 'Jinba'와 GM 국화 계통의 생육은 유의성 있는 차이가 보여지지 않았으며, 무측지성의 발현 정도에 따라 각 계통에 대한 유용성이 평가되어야 할 것으로 판단되었다. 특히 LeLS80 계통의 경우는 하계 고온기에 무측지성이 잘 발현됨을 관찰할 수 있어서 향후 무측지성 발현을 위한 유전자원 및 이벤트 개발에 유용할 것으로 추정되었다. 병해충별 발생 정도 분석에서 꽃노랑총채벌레, 점박이응애, 목화진딧물, 온실가루이 등은 발생시기는 종별로 달랐으나 계통간 차이는 보이지 않았었고, 병해충별 총발생량에서도 계통간 유의차는 없는 것으로 나타났다. 토양미생물의 변화를 살펴본 결과, 세균과 방선균은 'Jinba'와 GM 국화 계통간에 유의성 있는 차이가 보여지지 않았으며, 사상균은 모든 GM 국화가 'Jinba'보다 높은 값을 보였다. 종합적으로 볼 때, 지속적인 실질적 동등성 평가를 위해 앞으로 모니터링 연구를 기초하여 다양한 측면에서 접근할 필요성이 있는 것으로 판단되었다.