• 환경생물
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• 제36권4호
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• pp.544-549
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• 2018

2017년과 2018년 노지고추 재배기간인 6~8월 간 전북 고창, 충남 청양, 충북 괴산지역 노지 고추 포장에서 총채벌레의 종류와 발생현황을 조사하였다. 시기별로 총채벌레를 채집하여 동정한 결과 꽃노랑총채벌레 (Frankliniella occidentalis), 대만총채벌레(F. intonsa), 파총채벌레(Thrips tabaci)의 발생이 확인되었다. 이들 3종 중 대만총채벌레가 시기별로 가장 발생 밀도가 높은 것으로 보아 우점종으로 보여진다. 총채벌레의 발생은 6월 하순부터 증가하기 시작하여 7월 중순에 밀도가 가장 높았다. 따라서, 노지고추에서 총채벌레 방제전략은 6월 상순부터 모니터링하여 밀도증가 이전에 적절한 방제방법을 동원하여야 할 것이다.

• 한국토양비료학회지
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• 제48권6호
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• pp.683-688
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• 2015

Nowadays, sustainable and environment-friendly agriculture has become an important issue all around the world, and repeated applications of mineral and/or organic fertilizer will probably affect mineral nutrient dynamics in soil in the long term but only a limited number of observations are available. This study was carried out to investigate whether there is any influence of different fertilizer management for red pepper (Capsicum annuum L.) cultivation on soil physicochemical properties, leaf mineral content, yield and fruit quality in the aspect of long-term practice in open field condition. NPK, NPK+compost, compost only, and unfertilized control plot were included in the treatments. The application of chemical fertilizer and/or compost repeated annually for 17 years from 1994 to 2011. Soil organic matter content was higher in compost treatments than in no-manure treatments. Available phosphate and the yield of red pepper were highest in NPK+compost treatment followed by NPK (chemical fertilizer), compost, and control. The results indicate that in the long term, nitrogen supply is still needed for increasing red pepper yield, but reduction in the use of chemical fertilizer could be also possible with the proper application of compost.

• Journal of Ecology and Environment
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• 제38권3호
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• pp.353-360
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• 2015

A survey of weed occurrence was conducted to identify problematic weed species in a horticultural crop field to get basic information for effective weed control. Surveys of weed species occurring in horticultural crop fields (garlic, onion, red pepper and Chinese cabbage) were conducted in Chungnam province of Korea from April to October in 2014. A total of 516 sites of the 17 regions were identified as having 114 weed species belonging to 32 families. The most dominant weed species in the horticultural crop fields were Chenopodium album var. centrorubrum (8.83%), followed by Digitaria ciliaris (5.71%), Conyza canadensis (5.46%) and Capsella bursa-pastoris (4.67%). Specifically, as a result of this study, the occurrence of 35 species of exotic weeds, such as Chenopodium album and Taraxacum officinale, were confirmed. Almost 68% of the investigation sites was determined under dominance value 1 (range of cover < 10; numerous individuals) by Braun-Branquet cover-abundance scale, indicating a proper weed control in horticultural crop field. As a result of scientific and technological advances, an improved cultivation method is changing the weed occurrence in agricultural land. Additional research needs to be undertaken for the development of weed control methods through such periodic monitoring of occurrence of weeds.

• 한국토양비료학회지
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• 제46권5호
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• pp.322-326
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• 2013

Many organic fruit growers adopt cover cropping in their orchards to improve soil properties. A field experiment was conducted to determine the effects of cutting frequency of cover crop (CF) and liquid manure application (LM) on green manure production (GMP) and returnable nutrient content (RNC) in pear orchard. The combined effects of CF and LM were tested at two levels, respectively, with liquid manure ($L_1$) and without liquid manure ($L_0$). After that, cover crops were cut once ($C_1$) and three times ($C_3$) in rye, and twice ($C_2$) and four times ($C_4$) in hairy vetch. The result showed that main factors related to green manure production were different depending on the species. In rye, LM was more effective in increasing the dry weight of cover crop and RNC than CF. In contrast, the parameters were more affected by CF rather than LM in hairy vetch. Thus, it is suggested that different management technique is needed depending on the cover crop species in order to maximize the green manure production in pear orchard.

• 한국작물학회지
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• 제23권3호
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• pp.73-82
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• 1978

Researches on weed control in vegetable and fruits are reviewed in the aspects of technical dissemination of research results and problems to be solved for the establishment of integrated weed control measures. The future researches in relation to the possible changes of cultivation pattern in horticultural crops are also discussed. The current situation of weed control in horticulture in general is classed as a primitive stage comparing to other food crops and is well behind of other advanced countries. It is strongly suggested that only steady and extensive researches in this field will produce a significant contribution to the minimization of labor cost in horticultural crop production.

• 한국토양비료학회지
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• 제45권1호
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• pp.83-85
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• 2012

The causes of blossom-end rot (BER) are still not understood clearly, although there was a lot of research on the development of BER over 100 years. This experiment was conducted to investigate the influence of Ca content of fruit on the incidence of BER in red pepper. BER affected fruits and healthy fruits had been harvested and the samples were divided into two parts, the upper and the lower, for chemical analysis to determine the content of mineral nutrients in the tissue. The content of nitrogen (N), phosphorus (P), potassium (K) and magnesium (Mg) was higher in the BER affected fruits and the difference of each nutrient content was revealed much larger in the lower part of the fruit but there were no significant differences in calcium content between the BER and the healthy fruits of red pepper, in this experiment. The results indicate that it is difficult to find a certain relation between the calcium content of the fruit and the occurrence of blossom-end rot.

• The Plant Pathology Journal
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• 제32권1호
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• pp.65-69
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• 2016

In plant virus ecology, weeds are regarded as wild reservoirs of viruses and as potential sources for insect-mediated transmission of viruses. During field surveys in 2013-2014, three Leonurus sibiricus plants showing virus-like symptoms were collected from pepper fields in Daegu, Seosan, and Danyang in Korea. Molecular diagnosis assays showed that the collected L. sibiricus samples were infected with either Tomato spotted wilt virus (TSWV), Pepper mild mottle virus (PMMoV), or Beet western yellow virus (BWYV), respectively. Since this is the first identification of TSWV, PMMoV, and BWYV from L. sibiricus, complete genome sequences of three virus isolates were determined to examine their phylogenetic relationships with the previously reported strains and isolates. Phylogenetic analyses performed using full genome sequences of the viruses showed the isolates of TSWV and PMMoV obtained from L. sibiricus are closely related to the pepper isolates of the corresponding viruses. Our results suggest that L. sibiricus could act an alternative host and reservoir of viruses that cause damages in pepper fields.

• 농업과학연구
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• 제49권1호
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• pp.113-120
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• 2022

Leaf blight disease caused by Stemphylium species is an important disease in Allium crops, specifically onion, garlic and welsh onion. In 2018, leaf blight symptoms were severe and damaged onion and garlic in Jeonnam province in Korea. In addition, small purple spots on garlic burbs were observed in a post-harvest storage warehouse. Several Stemphylium isolates were isolated from diseased leaves from the field and from garlic bulb samples and were analyzed in terms of homology and the phylogenetic relationship based on the internal transcribed spacer region and calmodulin gene sequence. The results showed that among three Stemphylium species identified, S. vesicarium is most prevalent on onion and garlic. S. eturmiunum was for the first time identified as pathogenic to onion and garlic, whereas S. solani was found in welsh onion crops. Although these isolates grew well at the optimum temperature at 20 - 25℃, they could also grow at low temperatures of 10 - 15℃. A pathogenicity test was conducted using S. vesicarium and S. eturmiunum on onion and garlic respectively. These results showed that two Stemphylium species were highly virulent with cross pathogenicity in onion and garlic. The results of this study can support the biological characterization of Stemphylium species in Korea. Moreover, further research will need to develop fungicide application strategies for onion and garlic crops.

• 한국응용곤충학회지
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• 제56권4호
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• pp.357-363
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• 2017

12월부터 3월까지 갈색날개매미충 알이 붙어 있는 블루베리나무와 복숭아나무의 가지를 전정한 후 가지의 마름정도와 갈색날개매미충 알의 부화율을 조사하였다. 갈색날개매미충 알의 부화율은 블루베리와 복숭아 모두 1% 미만으로 정상적인 가지(52.8~68.4%)에 비해 부화율이 매우 낮은 수준이었다. 부화시기에 전정가지의 함수율은 블루베리와 복숭아 각각 9.8~20.9%, 7.5~13.8%로 매우 낮았다. 즉 갈색날개매미충의 알이 붙어 있는 가지를 전정할 경우 가지가 심하게 마르기 때문에 가지 속의 알도 건조해져서 정상적으로 부화하지 못하게 되는 것으로 나타났다.

• 한국응용곤충학회지
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• 제52권4호
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• pp.431-436
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• 2013

갈색날개매미충(Ricania sp.)은 블루베리에서 흡즙에 의한 양분손실과 감로로 인한 그을음을 유발하고, 암컷 성충은 1년생 가지의 목질부속에 산란하여 가지를 고사시키는 해충이다. 본 연구는 갈색날개매미충 월동 알들의 실내 온도발육 실험과 노지에서 약충의 부화 시기 조사를 위하여 실시하였다. 충남 예산의 노지재배 블루베리에서 갈색날개매미충 난괴를 채집하여 10, 14, 18, 22, 26, 30, $34^{\circ}C$ (14L:10D) 조건하에서 매일 부화하는 약충수를 조사하였다. 전혀 부화하지 않은 $10^{\circ}C$ 처리구를 제외한 월동 난괴의 온도별 부화소요기간은 평균 107.1, 54.5, 33.9, 25.3, 25.1, 16.7일로 온도가 높을수록 짧아졌고 부화율은 23.1, 30.8, 13.8, 21.7, 11.9, 0.6%로 조사되었다. 노지에서 정확한 부화시기 조사를 위하여 약충으로 부화하자마자 끈끈이트랩에 포획되도록 클립케이지를 설치하여 3~4일 간격으로 포획된 약충수를 조사하였다. 약충은 5월 19일과 22일 사이에 처음 발견되었으며 평균 19.6%의 부화율을 보였다. 조사한 40개의 피해 가지 중 15개의 가지에서는 약충이 전혀 부화하지 않았다.