• Korean Journal of Environmental Biology
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• v.41 no.4
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• pp.530-538
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• 2023

This study conducted an investigation into the effects of fruit type and cultivation practices (organic and conventional) on soil characteristics and soil arthropod communities within apple, blueberry, grape, peach, and pear orchards. The collection of soil arthropod communities was achieved through the utilization of pitfall traps, with concurrent measurements taken for soil moisture content, electrical conductivity, and temperature. The findings of this study unveiled substantial impacts attributed to fruit type and cultivation practices on soil characteristics. Specifically, within organic apple orchards, discernibly higher levels of soil moisture content, electrical conductivity, and temperature were observed when compared to their conventional counterparts. The investigation into soil arthropod communities yielded a total of 1,527 individuals, classified in to five phyla and 15 orders. The range of abundance, species richness, and diversity indices varied across conventional and organic orchards. Cultivation practices were found not to exert a significant influence on soil arthropod community characteristics. However, Non-metric Multidimensional Scaling (NMDS) analysis indicated a significant differentiation in soil arthropod community structure based on cultivation practices. This study underscores the importance of considering vegetation structure and environmental characteristics that may influence soil arthropod communities comprehensively when assessing the impact of cultivation practices on soil arthropods. Furthermore, it emphasizes the need to account for both the characteristics and structure of soil arthropod communities in understanding the implications of cultivation practices on these organisms.

• Agrochemical news magazine
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• v.23 no.4 s.177
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• pp.14-18
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• 2002

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.13 no.3 s.108
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• pp.27-34
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• 1992

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.13 no.2 s.107
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• pp.56-64
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• 1992

• The Korean Publising Journal, Monthly
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• s.331
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• pp.74-75
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• 2003

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.10 no.5 s.92
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• pp.101-111
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• 1989

• Horticultural Science & Technology
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• v.19 no.3
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• pp.362-366
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• 2001

This survey was carried out to investigate the effect of flooding by heavy rain on growth characteristics and disease incidence of 'Fuji'/M.26 mature apple tree in 1998 at Kyongbuk province. The surveyed regions were Andong, Uisung, and Gunwi area. The six orchards were selected from one area, totally 18 orchards were surveyed. The flooded depth of surveyed orchards was from 70 to 350 cm, and the flooded duration was from 6 to 72 h. Defoliation ratio, number of abnormal budding, and flowering per tree were increased along with the increment of flooded depth and duration. Rooting ratio was decreased rapidly with the increment of flooded duration, and dead root ratio was 16.2% in flooded orchards. Marssonia blotch (Diplocarpon mali), white rot (Botryosphaeria dothidea) of fruit, and phytophthora fruit rot (Phytophthora cactorum) incidence were increased in flooded orchards. The analysis results of pearson correlation coefficient among surveyed items showed that higher relationship of abnormal growth characteristics and increment of disease incidence of 'Fuji'/M.26 apple trees with flooded duration than with flooded depth. With these results, the flooded depth was found to be the main factor for the abnormal growth characteristics and disease incidences of 'Fuji'/M.26 apple trees.

• The Korean Journal of Pesticide Science
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• v.14 no.3
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• pp.266-271
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• 2010

Six insecticides, monocrotophos (24%, Lq), milbemectin (1%, Ec), tebufenpyrad (10%, Ec), propargite (30%, Wp), dicofol (42%, Ec), and fenpropathrin (5%, Ec) were studied for their $LC_{50}s$ to local two-spotted spider mite (TSSM) strains collected at apple orchards in Chungju, Kunwi and Sobo in Korea. Monocrotophos and fenpropathrin were not effective due to resistance development, but milbemectin, tebufenpyrad, dicofol and propargite were effective to TSSM. $LC_{50}$ values to TSSM strains showed the same distribution pattern among apple orchards. However, TSSMs from different apple orchard were clustered into different groups.

• Korean journal of applied entomology
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• v.58 no.2
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• pp.159-164
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• 2019

The purpose of this study was to investigate whether leaf damage in pear orchards caused by large black chafer beetles can be controlled through net traps and clove oil treatment. In June 2017, we measured large black chafer beetle population density and leaf damage rates in two orchards, located in Boseong and Hampyeong, under three treatments: net, net plus clove oil, and control. In order to evaluate the effect of net position on the adult beetles, nets were placed outside the orchard and along the upper and lower parts of a horizontal trellis. The adult beetle population density was 20.4 to 34.7% lower in the net alone treatment, and 21.1 to 38.1% lower in the combined net and clove oil treatment than in the control. The adult beetle population density was 10.9-14.4 times higher outside the orchard and 5.1 to 9.1 times higher in the upper parts of the horizontal trellis than in the lower parts of the horizontal trellis. Leaf damage under both the net only and net plus clove oil treatments was significantly lower than that in the control at both sites. Therefore, intensive net installation around orchards may be a practical organic alternative to prevent leaf damage caused by large black chafer beetles.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2003.04a
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• pp.142.1-142
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• 2003

저장 중 단감은 과피 및 과육의 변색 발생으로 인한 품질저하가 심각하게 발생하고 있는데, 아직까지 이를 방지하기 위한 원인 규명은 매우 미흡한 실정이다. 이에 본 연구에서는 단감의 재배지, 수확시기, 크기, 예조기간, 저장온도, 저장기간, 포장재의 두께 등을 달리하여 저장하면서 처리조건에 따른 단감 과육의 갈변 발생 관련성을 조사하였다. 단감의 변색발생 증상은 저장 1개월 이후부터 일부 나타나기 시작하여 저장기간이 경과할수록 심하였다. 단감의 갈변 발생률 및 갈변 정도를 실험 처리구별로 살펴보면 과수원, 수확시기, 예조기간, 저장온도, 포장재의 두께, 포장 내 가스조성에 따라 차이를 보였는데 단감의 수확시기가 늦을수록, 수확후 예조기간이 짧을수록, 저장을 위해 사용한 포장필름의 두께가 얇을수록 갈변발생정도가 심하였다. 또한 단감의 과수원에 따라서도 갈변의 발생률이 차이를 보여 동일지역이더라도 재배조건에 의하여서도 영향을 받는 것으로 나타났다. 이와 같은 결과를 종합하여 보면 단감 과육의 갈변발생은 수확 전 및 수확 후 인자들의 단독적인 영향이기보다는 복합적인 영향에 의한 것으로 추정되었다.