• 한국환경과학회지
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• 제25권8호
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• pp.1077-1085
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• 2016

The present study was investigated the effect of recycled coir organic substrates on the growth of different vegetable crops. The recycled coir had better physical and chemical properties than the new coir. The growth of tomato plant was better on the coir substrate that had been used for 2 years than that on the new coir substrate. The average number of tomato fruits was 108 on the new coir substrate, while it was 179 and 165 on the coir substrate used for 1 and 2 years, respectively. The growth of cherry tomato plant was also better on the coir substrate used for 2 years than that on the new coir substrate. The average number of cherry tomato fruits was 43 on the new coir substrate, while it was 206 and 164 on the coir substrate used for 1 and 2 years, respectively. The growth of brussel sprout was better on the coir substrate used for 3 years than that on the new coir substrate and the average number of brussel sprout leaves was 26.8 on the new coir substrate, while it was 34.3 on the coir substrate used for 3 years. The growth of Korean cabbage improved on the coir substrate used for 1 years compared to the new coir substrate and the number of leaves was 15.1 on the new coir substrate, while it was 24.3 on the coir substrate used for 1 year. Thus, used coir can be recycled to improve vegetable yields compared to using new coirs.

• 한국유기농업학회지
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• 제14권2호
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• pp.219-228
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• 2006

전남 담양지역의 시설재배 토마토에서 발생하는 arbuscular 균근균의 분포를 조사하였다. 총 21 농가의 토마토 재배 토양을 채취한 후 arbuscular 균근균의 포자를 분리하여 계수한 결과 $500{\mu}m$ 이상은 0.01개 정도, $355{\sim}500{\mu}m$는 0.02개 정도, $251{\sim}354{\mu}m$는 0.09개 정도, $107{\sim}250{\mu}m$는 0.9개 정도, $45{\sim}106{\mu}m$는 2.0개 정도였으며, 토양 g 당 평균 3.02개 정도의 포자밀도로 분포하였다. 토마토 뿌리에서 균근 감염 양상을 보면 vesicle 18.0%, hyphae 6.0%, arbuscule 2.0%등 전체적으로 26.0% 정도의 감염율을 보였다. 분리된 arbuscular 균근균 포자를 수단그라스에 재접종하여 4개월 정도 배양하여 arbuscular 균근균의 동정을 실시한 결과 Glomus sp., Gigaspora sp. 및 Acaulospora sp. 등으로 동정되었다.

• 한국환경농학회지
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• 제42권4호
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• pp.427-434
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• 2023

본 연구에서는 볏짚과 토마토와 같은 농업부산물이 우분의 혐기성 소화를 통한 메탄 생성에 미치는 영향을 알아보기 위해 각 기질을 단독 소화한 것과 혼합 소화한 것을 비교하였다. 우분의 경우 토마토와 병합 소화했을 때 우분 단독 소화 시보다 메탄 생성량이 증가하였고, 혼합 기질 내 토마토 함량이 중요한 역할을 하였다. 본 연구를 통해 농업부산물을 활용한 분뇨의 바이오가스화 향상 가능성을 확인하였다.

• 한국환경과학회지
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• 제32권12호
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• pp.973-978
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• 2023

This study determined the mechanisms of selection of companion plants that will increase natural enemies and compared and analyzed the effect of suppression of pest density and changes in pest and natural enemy density and spatial distribution, aiming to select suitable companion plants to control major pests that are problematic in organic tomato facility cultivation. As a result of the companion plant selection, 13.5 days were identified in the area with daily flowers among five species of flowering plants. In the experiment to determine the timing of natural enemies, the best results were found in the treatment group introduced two weeks before the pest occurred. As a result of the actual package test, farmers could see that the density of greenhouse pollen decreased significantly (100-500% for adults and 11-67% for larvae compared to no treatment) in the treatment with companion plants. Based on the results of this study, we expect that ecological pest management using companion plants that attract natural enemies will help to increase biodiversity through vegetation management, secure the safe production of organic products and improve the sustainability of agriculture.

• 한국유기농업학회지
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• 제28권1호
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• pp.95-108
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• 2020

To develop an environment-friendly fungicide for controlling tomato wilt diseases, antifungal active substance was isolated Rheum australe D. Don roots against Fusarium oxysporum f. sp. lycopersici, a pathogen of tomato wilt, in this study. Methanol extract obtained from Rheum australe roots was successively fractionated with hexane, chloroform, ethyl acetate, butanol and water. The ethyl acetate fraction, which showed the highest antifungal activity, was separated by column chromatography, and 60 subfractions were obtained. The 60 subfractions were anlayzed for antifungal activities by bioassay. The active compound was identified as 5-[(E)-2- (3-hydroxy-4-methoxyphenyl)ethenyl]benzene-1,3-diol (rhapontigenin) by NMR and GC-MS analysis. As a result of testing antifungal activity of rhapontigenin against Fusarium oxysporum, EC₅₀ of rhapontigenin was showed strong antifungal activity at 7.48 mg/L. Therefore, this study showed that the Rheum australe roots extract can be a potential candidate which is a environment-friendly fungicide against Fusarium oxysporum.

• 한국유기농업학회지
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• 제6권1호
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• pp.109-116
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• 1997

This experiment was carried out to examine the effect of various functional materials such as bioceramic podwers, crushed shells and elvanites supplemented to the each substrate on the seedlings growth of cucumber, watermelon and tomato. The seedlings were grown in pots filled with substrates of bioceramic podwers, crushed shell and elvanites. The growth of cucumber seedlings in terms of plant height, stem diameter, leaf width, leaf area, plant fresh and dry weight was promoted by adding the bioceramic. powder (1 to 2g/kg), crushed shells (20 to 80g/kg) or elvanites (20 to 80g/kg). Watermelon seedlings in terms of plant height, number of leaves and leaf area were greater than those of the control by adding bioceramics (1 to 2g/kg). Plant height was also promoted by the adding of bioceramic power from 16 days after treatment. But leaf area was increased from 8 days after treatment, while stem diameter was not affected. Watermelon seedlings were also influenced by adding curshed shells (20 to 80g/kg) and elvanites (20 to 40g/kg) into each substrate. The growth of characteristics of tomato seedlings were promoted by adding 1 to 3g/kg of bioceramics, 10 to 80g/kg of crushed shell or 20 to 40g/kg of elvanites, respectively. Especially, root growth was greatly influenced by bioceramic powder, whereas the shoot growth(leaves and stem) was stimulated by crushed shells and elvanites suppemented into substrate.

• The Plant Pathology Journal
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• 제24권1호
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• pp.87-89
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• 2008

A blue mold on tomato fruit caused by Penicillium oxalicum occurred sporadically in a greenhouse at Gyeongsangnam-do Agricultural Research and Extension Services. Infection usually occurred through wounds or cracks on the fruits. Symptoms began with water soaking lesions, then became watery and softened eventually. Colony of the causal fungus was white at the early growing stage, turned green on Czapek yeast extract agar and malt extract agar. Conidia were ellipsoidal in shape and $2-6{\times}2-4{\mu}m$ in size. Stipes were septate, smooth, thin walled, and $90-280{\times}3-4{\mu}m$ in size. Penicilli were mostly biverticillate. Ramuli were 1-3 groups, smooth, and $10-16{\times}2-3{\mu}m$ in size. Rami were 1-2 groups and $6-30{\times}2-4{\mu}m$ in size. Metulae were 2-3(5) verticils, smooth, and $12-20{\times}3-4{\mu}m$ in size. Phialides were 5-7 verticilate, ampulliform to cylindroidal, smooth, and $8-12{\times}2-3{\mu}m$ in size. Optimum temperature for growth was about $25^{\circ}C$. Pathogenicity of the fungus was proved on tomato fruit according to Koch's postulation. On the basis of mycological and pathological characteristics, the fungus was identified as P. oxalicum Currie & Thom. This is the first report of the blue mold on tomato fruit caused by P. oxalicum in Korea.

• 한국유기농업학회지
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• 제27권2호
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• pp.205-224
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• 2019

본 연구는 유기재배에서 작물촉진용으로 활용되고 있는 농가 자가 제조 액비에 대한 토마토 생육 효과와 무기영양소를 평가하여 액비의 표준화 제조기술을 개발하는데 기초자료로 활용하고자 수행되었다. 농가 자가 제조 액비 62개 중 생선 액비 14개, 해조류 액비 8개, 음식물 액비 5개, 식물·농작물 액비 23개, 기타 액비 12개로 다양한 원료를 이용하여 제조되었다. 수집 62개 액비를 농도별로 희석하여 파종 후 20일된 토마토 육묘에 처리한 경우 경엽처리의 47~48개와 그리고 토양처리의 30~31개에서 지상부 생체중이 20~30% 증가하였다. 그러나 파종 후 40일된 토마토 육묘에 처리한 경우 경엽처리의 17~32개 및 토양처리의 6~7개에서 지상부 생체중이 20~30% 증가하였다. 따라서 파종 후 40일된 토마토 육묘에 액비를 처리한 경우보다도 20일에 처리한 경우에서, 토양처리보다는 경엽처리에서 토마토 육묘 생육이 더욱 증가하였다. 일반적으로 액비 처리량이 많을수록 토마토 육묘 생육이 증가하였고, 1회 액비처리에 비해 2회 액비처리에서 토마토 육묘 생육이 증진되었다. 또한 액비 처리에 의한 효과는 초장보다는 지상부 생체중에서 더욱 효과적이었다. 선발 액비 10종에 대해 성분을 분석한 결과 다량 및 미량원소 함량은 시료 간 차이가 크지만 농가 자가 제조 액비 처리에 의한 토마토 생육증진은 액비에 존재하는 다량 및 미량원소에 의해서 기인되는 것으로 사료된다.

• 한국유기농업학회지
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• 제16권2호
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• pp.151-171
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• 2008

The objective of this paper is to evaluate the feasibility of exporting Korean organic agricultural products to Japanese market. To achieve the objective, we explored the marketing trend of organic agricultural products in Japan and surveyed marketing dealers and food processors that deal with organic foods. We also analyzed Korean farmers' intention of acquiring organic Japanese Agricultural Standard(JAS) certificate in order to export organic agricultural products. The results show that mini tomato is economically feasible to acquire organic JAS certificate but other agricultural products need more attentions. The results also suggest that the education of production and safety management using the international standards such as Japanese Agricultural Standard should be strengthened by local government to promote export of organic agricultural products. The paper implies that producers acquiring organic Japanese Agricultural Standard should be systematization to get larger scale and to guarantee the stability in export supply.

• 농약과학회지
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• 제8권2호
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• pp.137-144
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• 2004

페닐기의 4 위치(para)에 치환체가 존재하는 베타-케토아세트아닐라이드 염화물은 선택적으로 토마토 역병에 대하여 살균 활성을 보였다. 베타-케토아세트아닐라이드 염화물 5종(KIST163, KIST170, KIST260, KIST263, KIST267)을 선발하여 이들의 토마토 역병에 대한 예방효과, 치료효과, 침투이행성, 약효 지속성 및 성체실험과 같은 약제의 작용특성을 조사하였다. 그들 모두는 예방효과를 보였으며, KIST163과 KIST170의 $EC_{50}$은 각각 21.9와 $14.5{\mu}g/mL$로 우수한 예방효과를 나타내었다. 하지만 이들 화합물의 토마토 역병에 대한 치료효과는 거의 없었으며, 토양관주처리 후의 침투이행성에 의한 방제효과는 미미하였다. 접종 7일전에 처리한 KIST163과 KIST170의 $100{\mu}g/mL$는 75% 이상의 방제효과를 보여 약효 지속성이 뛰어남을 알 수 있었다. 토마토 성체를 이용한 토마토 역병 방제실험에서 5종 화합물 중 특히 KIST163과 KIST170은 방제효과가 높아 $100{\mu}g/mL$에서 95% 이상의 방제효과를 보였다. 이상의 결과로부터 베타-케토아세트아닐라이드 염화물 유도체 5종은 주로 경엽처리 예방제이며, 이들 중 KIST163과 KIST170은 포장에서도 토마토 역병에 대하여 우수한 방제효과를 나타낼 것으로 판단되었다.