• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2009년도 심포지엄 및 춘계학술발표회
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• pp.145-146
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• 2009

• 식물병연구
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• 제27권3호
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• pp.91-98
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• 2021

The current social demand for organic, sustainable, and eco-friendly approaches for farming, while ensuring the health and productivity of crops is increasing rapidly. Biocontrol agents are applied to crops to ensure biological control of plant pathogens. Research on the biological control of white root rot disease caused by a soil-borne pathogen, Rosellinia necatrix, is limited in pears compared to that in apple and avocado. This pathogenic fungus has an extensive host range, and symptoms of this disease include rotting of roots, yellowing and falling of leaves, wilting, and finally tree death. The severity of the disease caused by R. necatrix, makes it the most harmful fungal pathogen infecting the economical fruit tree species, such as pears, and is one of the main limiting factors in pear farming, with devastating effects on plant health and yield. In addition to agronomic and cultural practices, growers use chemical treatments to control the disease. However, rising public concern about environmental pollution and harmful effects of chemicals in humans and animals has facilitated the search for novel and environmentally friendly disease control methods. This review will briefly summarize the current status of biocontrol agents, ecofriendly methods, and possible approaches to control disease in pear orchards.

• 한국약용작물학회지
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• 제19권2호
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• pp.83-89
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• 2011

This studies were conducted to investigate the growth responses and yields of Astragalus membranaceus Bunge which were grown with organic cultivation using two organic fertilizers and two green manure crops of hairy vetch and rye in 2008 and 2009. The lengths of stems and roots were not clearly different between organic and conventional cultivations. The root diameters and the branch numbers were slightly thicker and more in all treatments of organic cultivation than that of conventional cultivation in 2008, although they were not significantly different between two cultivating methods in 2009. The dry weights of shoot and root were heavier on organic cultivation than those on conventional cultivation. The T/R ratios were commonly higher in organic culture, showing more clearly in 2008 than 2009. The yields were generally higher in organic cultivation than those in conventional cultivation in 2008 although the effect did not clear on yield in 2009. The organic cultivation using of organic fertilizers and green manure crops would be new method to have safety and qualitative products. The techniques of organic cultivation for Astragalus membranaceus Bunge would be studied more on utilizing the natural organic resources.

• 식물병연구
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• 제16권1호
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• pp.1-9
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• 2010

Among the plant specimens requested from agricultural actual places of farmers, Agency of agricultural extension services and so forth for the diagnosis of plant virus diseases in 2009, the rate of crop types was 87.5% for vegetables, 4.0% for upland crops and 3.5% for orchids. In vegetables, the crops damaged severely by viral diseases were red pepper and tomato by the infection rate of 51.6% and 26.5%, orderly. Virus species occurring vegetables were 19 and the economically important viruses were Cucumber mosaic virus (CMV), Tomato spotted wilt virus (TSWV), Tomato yellow leaf curl virus (TYLCV), Pepper mild mottle virus (PMMoV) with the infection rate of 33.2%, 16.9%, 16.1% and 7.4%, respectively. Rice stripe virus (RSV) occurred at the whole areas of west coast in Korea in 2009, and its incidence was 14.2% mainly on the susceptible cultivars and yield loss was estimated up to 50%. TYLCV was spread at 34 areas of Si and/or Gun, 22 areas in 2009 and 12 in 2008. Distribution of TSWV was expanded newly in 6 areas of Si and/or Gun including Gangryung, Gangwondo in 2009, and its occurrence areas were 23 Si and/or Gun after first incidence at Anyang area in 2004. Tomato bushy stunt virus (TBSV) was incited newly at Gimcheon area in 2009 with the infection rate of 65.2%, and its soil transmission rate was 55.0% in average.

• 한국자원식물학회지
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• 제32권1호
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• pp.45-52
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• 2019

기후변화 적응과정에서 도입 작물의 국내 재배실태를 조사하고 대응과제를 도출코져본 연구를 수행하였으며, 그 결과는 다음과 같다. 도입 열대 아열대 채소 재배현황(2015년 기준)은 18작목으로 재배농가수는 920농가, 재배면적은 321 ha로 조사 추정되었고, 재배면적이 많았던 작물은 울금, 여주, 아스파라거스, 삼채, 허브류 순이었다. 도입 열대 아열대 과수류 재배 현황은 2015년 국내재배 농가수와 재배면적은 264농가 106.5 ha로 추정되며, 전년대비 각각 51.7%와 83.7% 증가하였다. 도입 특약용작물 재배현황(2015년 기준)은 10작물로 753농가에서 재배면적 276.3 ha로 조사 되었으며 재배면적이 많았던 작물은 강황, 감초, 마카, 모링가, 포포나무 순이었다. 도입 열대 아열대 작물의 국내 재배가 안정적으로 정착되기 위해서는 국내 재배적응성 검정에 의거 재배환경면에서의 안전성과 경제성이 있어야 하며, 생산물의 이용과 유통 및 판로의 확보 문제, 외국현지 수입산과의 경쟁력 등을 고려할 필요가 있고, 국가 간 이동에 따른 생물다양성협약 등 국제협약 및 국내 종자산업법에 의하여 도입되어야 할 것이다.

• 한국환경농학회지
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• 제31권3호
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• pp.212-216
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• 2012

녹비작물의 토양 환원에 따른 상추 및 얼갈이 배추의 수량과 더불어서 토양의 양분 수지량에 미치는 영향을 평가하고자 여름 휴한기 동안 두과 (네마장황, 세스바니아) 및 화본과(하우스솔고, 수단그라스) 녹비작물을 재배하였으며 화학비료를 시비한 질소 검정시비구 1.0N (130 kg/ha)를 대조구로 하여 비교하였다. 녹비작물의 생육에 있어서 두과인 네마장황과 세스바니아는 화본과인 하우스솔고와 수단그라스와 비교하여 생초량은 적었으나 질소의 양분함량은 높아서 토양으로 환원된 질소량은 네마장황(130 kg/ha) 및 세스바니아(116 kg/ha)가 하우스솔고(93 kg/ha)나 수단그라스 (87 kg/ha) 보다 많았다. 녹비작물의 토양환원 후 상추와 얼갈이 배추의 수량은 질소 무시비구를 제외하고 두과 녹비작물, 두과 녹비작물+화학비료 0.5N, 화본과 녹비작물+화학비료 0.5N 등 다양한 녹비작물 처리는 대조구인 화학비료 1.0N과의 비교에서 유의성 없었지만 수량은 상추에서 170~1,100 kg/ha가 얼갈이 배추에서 2,770~5,210 kg/ha가 증대되었으며, 이러한 수량 증수로 인해서 3,953~5,120 천원/ha에 해당하는 소득증가 효과가 산출되었다. 토양의 질소 양분수지는 녹비작물만 투입한 네마장황과 세스바니아 처리에서는 각각 46과 31 kg/ha를, 네마장황+화학비료 0.5N과 세스바니아+화학비료 0.5N 에서는 각각 109와 99 kg/ha를 보였으며, 하우스솔고+화학비료 0.5N과 수단그라스+화학비료 0.5N 에서는 각각 72와 66 kg/ha의 값을 나타내었다. 이는 화학비료 1.0N 처리에서의 질소 양분수지인 49 kg/ha와 비교하여 볼 때 녹비작물 및 화학비료와의 혼합시비를 통해서도 토양에 안정적인 질소 유지가 가능하다. 그러므로 녹비작물의 토양환원 후 시설 상추와 얼갈이 배추를 재배하는 경우 화학비료의 시비가 필요 없거나 시비추천량의 50%를 절감할 수 있을 것으로 판단되었다.

• 한국약용작물학회지
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• 제24권3호
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• pp.237-245
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• 2016

Background: Cyanazine is used as a pre-emergent herbicide once during the growing season to control weeds of many upland crops worldwide. This study aimed to establish a method to determined cyanazine residue levels in major medicinal crops by using high performance liquid chromatography-UV detection/mass spectometry (HPLC-UVD/MS). Methods and Results: Cyanazine residue was extracted with acetone from the raw products of four representative medicinal plants - Scutellaria baicalensis, Paeonia lactiflora, Platycodon grandiflorum and Angelica gigas. The extract was diluted with a large volume of saline water and directly partitioned into dichloromethane to remove polar co-extractives in the aqueous phase. It was then purifined using optimized Florisil column chromatography. HPLC analysis conducted using an octadecylsilyl column allowed the successful separation of cyanazine from co-extractives of the samples, and the amount was sensitively quantified by ultraviolet absorption at 225 nm with no interference. The accuracy and precision of the proposed method were validated by conducting recovery experiments on each medicinal crop sample fortified with cyanazine at two concentration levels per crop in triplicate. Conclusions: The mean recoveries ranged from 91.2% to 105.3% for the four representative medicinal crops. The coefficients of variation were less than 10%, irrespective of the sample types and fortification levels. The limit of quantification of cyanazine was 0.02 mg/kg as verified by the recovery experiment. A confirmatory method was performed by liquid chromatography/MS using selected-ion monitoring technique to clearly identify the suspected residue.

• 한국약용작물학회지
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• 제26권4호
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• pp.291-295
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• 2018

Background: The use of Rehmannia glutinosa of the family Scrophulariaceae, in traditional medicine is well known. This study was conducted to elucidate the effect of air curing of the seed rhizome of R. glutinosa on its storability and yield. Methods and Results: The root of the R. glutinosa cultivar (Dagang) was harvested in at the end of November. The seed rhizomes were air cured for one to seven days. They were subsequently wrapped with newspaper and further stored in a plastic container at $1^{\circ}C$. It was observed that the weight loss and decay rates were significantly lower in the air cured seeds than in the untreated ones. Moreover, the decay rate of the control was approximately 50%, 120 days after storage. However. the decay rate of all the air cured treatment groups was less than 1%. Additionally, air curing led to an increase in the germination rate of the seeds and the root yield when compared with the untreated groups. Taken together, the ideal treatment period for air curing was found to be 3 days. Under these conditions, the germination rate and yield were 88.7% and 2,185 ㎏/10a, respectively. Conclusions: This study successfully demonstrated that the air curing of seed rhizomes can lead to a considerable increase in the storability and yield of R. glutinosa.

• 한국토양비료학회지
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• 제44권2호
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• pp.306-307
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• 2011

Two phases of experiment were conducted to produce compost using sewage sludge and sawdust as mixing materials to determine their chemical properties and the performance of selected test crops. The first phase was done to produce compost as potting media and the second phase was done to test the efficacy of the produced compost. With regard to some chemical properties of the compost, pH was moderately acidic (5.11 to 5.58) while the OM, N, P, and K contents of the compost were 23.8-35.9, 1.12-1.56, 254.9-555.7, and 40.4-62.6, respectively.

• The Plant Pathology Journal
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• 제38권5호
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• pp.503-512
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• 2022

Lilies (Lilium spp.) are one of the most important ornamental flower crops grown in Korea. Most viral diseases in lilies are transmitted by infected bulbs, which cause serious economic losses due to reduced yields. Various diagnostic techniques and high-throughput sequencing methods have been used to detect lily viruses. According to Oxford Nanopore Technologies (ONT), MinION is a compact and portable sequencing device. In this study, three plant viruses, lily mottle, lily symptomless, and plantago asiatica mosaic virus, were detected in lily samples using the ONT platform. As a result of genome assembly of reads obtained through ONT, 100% coverage and 90.3-93.4% identity were obtained. Thus, we show that the ONT platform is a promising tool for the diagnosis and characterization of viruses that infect crops.