• Journal of Bio-Environment Control
• /
• v.22 no.1
• /
• pp.27-33
• /
• 2013

In order to provide basic data for the development of a controlled environment cultivation system and standardization of the structures, structural status and improvement methods were investigated for the fruit tree greenhouses of grape, pear, and peach. The greenhouses for citrus and grape cultivation are increasing while pear and persimmon greenhouses are gradually decreasing due to the advance of storage facilities. In the future, greenhouse cultivation will expand for the fruit trees which are more effective in cultivation under rain shelter and are low in storage capability. Fruit tree greenhouses were mostly complying with standards of farm supply type models except for a pear greenhouse and a large single-span peach greenhouse. It showed that there was no greenhouse specialized in each species of fruit tree. Frame members of the fruit tree greenhouses were mostly complying with standards of the farm supply type model or the disaster tolerance type model published by MIFAFF and RDA. In most cases, the concrete foundations were used. The pear greenhouse built with the column of larger cross section than the disaster tolerance type. The pear greenhouse had also a special type of foundation with the steel plate welded at the bottom of columns and buried in the ground. As the results of the structural safety analysis of the fruit tree greenhouses, the grape greenhouses in Gimcheon and Cheonan and the peach greenhouses in Namwon and Cheonan appeared to be vulnerable for snow load whereas the peach greenhouse in Namwon was not safe enough to withstand wind load. The peach greenhouse converted from a vegetable growing facility turned out to be unsafe for both snow and wind loads. Considering the shape, height and planting space of fruit tree, the appropriate size of greenhouses was suggested that the grape greenhouse be 7.0~8.0 m wide and 2.5~2.8 m high for eaves, while 6.0~7.0 m wide and 3.0~3.3 m of eaves height for the pear and peach greenhouses.

• Korean journal of applied entomology
• /
• v.25 no.4 s.69
• /
• pp.209-213
• /
• 1986

Dominant aphid species and seasonal fluctuations of the colonizing aphids on apple tree, peach tree, and pear tree were examined without insecticide treatment during $1982{\sim}1984$ in Suweon. The dominant species among the colonizing aphids in each fruit tree were Myzus malisuctus in April-June and Aphis citricola in Aug.-Oct. on apple tree; Myzus persicae in early springtime and Hyalopterus pruni in May-Oct. on peach tree; Sappaphis piri in April-June, Oct. and Aphis citricola in July-Sept. on pear tree. M. malisuctus and A. citricola on apple tree showed 3 peaks a year; the former was early June, late Aug. and early Oct., the latter early June, middle Aug. and late Sept. M. persicae on peach tree showed peak on late May to early June, and H. pruni on middle June and middle Oct. S. piri and A. citricola on pear tree showed 2 peaks a year; the former was late May and late Oct., the latter early June and early Sept.

• Microbiology and Biotechnology Letters
• /
• v.44 no.4
• /
• pp.493-496
• /
• 2016

Peach rosette mosaic virus (PRMV) is a plant virus that was first reported in 1933 by Peach. It can infect hosts including peach, grape, blueberry, dandelion, plum, cherry tree, and weeds. PRMV is non-reportable in Korea, but it is designated as a controlled virus requiring plant quarantine. In this study, for the rapid and specific detection of PRMV, we developed an assay using loop-mediated isothermal amplification (LAMP). Comparison between conventional polymerase chain reaction (PCR) methods (real time-PCR and nested PCR) and LAMP for the detection of PRMV revealed an equivalent level of sensitivity by all the tested methods. For the LAMP assay, outer primer sets were used to amplify a 264-bp PCR product, which was then digested using the restriction enzyme Pvu II (CAG/CTG), and the visualization of two digestion fragments (207 + 57 bp) indicated a positive reaction. The developed LAMP assay for PRMV is expected to enable the rapid monitoring of PRMV in plants.

• Korean journal of applied entomology
• /
• v.26 no.3 s.72
• /
• pp.117-122
• /
• 1987

Insect visitors of peach and plum blossoms and their activities were observed from Apr. 1 to Apr. 30, 1987 in the orchard of Gyeongsang National University, Jinju, Gyeongnam. A total of 22 species of 22 genera from 18 families and 4 orders, and 20 species of 20 genera from 14 families and 4 orders were collected on peach and plum blossoms, respectively. The most number of insects visited flowers around 11 a.m. or around 2 p.m., depending on weather. Most of the species and numbers were collected at the time of 80%-blooming in peach tree but no distinct trend was observed in plum tree.

• Korean Journal of Plant Resources
• /
• v.18 no.2
• /
• pp.216-222
• /
• 2005

This study was carried out to investigate the utilization of pruned branch of a peach tree as natural dyeing material. The dyestuff was extracted from pruned branch of a peach tree. we examined the dyeing ability on silk and cotten fabrics. The surface color of silk fabrics differed depending on mordants. E values in treatments of mordants ranged from 11.63 to 30.86 as compared to non-treatment. Dyeing properties of cotten fabrics were improved with a treatment of sulfate of iron as compared with of non-treatment. The values a increased when the slaked lime and sodium hydroxide were used as mordants, while the values b increased when copper sulfate, alum and apple vinegar were used. We investigated the surface colors of silk and cotten fabrics after washing three times. In general, the surface colors of silk and cotten fabrics between the treatments of all mordants and non-treatment were diminished by the washing. We also investigated the surface colors of silk and cotten fabrics when those were washed and treated by the light after soaking those into various pH solutions. The surface colors of silk and cotten fabrics were considerably preserved by the washing, the light and pH concentration. In conclusion, our results suggest that the dyestuffs from pruning branch of a peach tree would be useful as a natural dyeing material using the optimized conditions for silk and cotten dyeing.

• Korean Journal of Plant Resources
• /
• v.18 no.1
• /
• pp.71-77
• /
• 2005

This study was carried out to investigate the utilization of pruned branch of a peach tree as natural dyeing material. The dyestuff was extracted from pruned branch of a peach tree. we examined the dyeing ability on silk and cotton fabrics. The surface color of silk fabrics differed depending on mordants. E values in treatments of mordants ranged from 11.63 to 30.86 as compared to non-treatment. Dyeing properties of cotton fabrics were improved with a treatment of sulfate of iron as compared with of non-treatment. The values a increased when the slaked lime and sodium hydroxide were used as mordants, while the values b increased when copper sulfate, alum and apple vinegar were used. We investigated the surface colors of silk and cotton fabrics after washing three times. In general, the surface colors of silk and cotton fabrics between the treatments of all mordants and non-treatment were diminished by the washing. We also investigated the surface colors of silk and cotton fabrics when those were washed and treated by the light after soaking those into various pH solutions. The surface colors of silk and cotton fabrics were considerably preserved by the washing, the light and pH concentration. In conclusion, our results suggest that the dyestuffs from pruning branch of a peach tree would be useful as a natural dyeing material using the optimized conditions for silk and cotton dyeing.

• The Journal of the Convergence on Culture Technology
• /
• v.5 no.1
• /
• pp.347-352
• /
• 2019

We analyzed the correlation among fruit bearing branch (FBB) and shoot and fruit characteristics in order to select the length of FBB suitable for producing high-quality fruits of 'Soomee', a peach tree developed in Korea. The length and diameter of FBB were 26.1 cm and 6.1 mm, respectively, shoot and leaf number per FBB were 3.2 and 38.6, respectively. Of these, the coefficient of variation was very high in the shoots and leaf number. The average weight and soluble solid content (SSC) of fruit were 298.6 g and 12.2 Brix, respectively, and coefficient of variation of the fruit weight was 18.0 %, which was higher than that of SSC. As the FBB of 10-20 cm and 20-30 cm length per tree were 27.1 % and 25.4 %, respectively, the sum of short and middle FBB frequency per tree was more than 50 %. Fruits of 250-350 g and 11.0-13.0 Brix per tree were distributed in 68.6 % and 74.0 %, respectively. As a result of correlation analysis, fruit weight and shoot number were affected by the length of FBB. In particular, length of FBB showed the relation of fruit weight with $y=-0.0482x^2+2.4512x+277.36$. As a result, the length of FBB that can maximize fruit weight was analyzed as 25.4 cm. Therefore, in the filed, the suitable FBB for producing 'Soomee' peach is estimated to be about 20-30 cm.

• Korean journal of applied entomology
• /
• v.43 no.1
• /
• pp.81-84
• /
• 2004

Plant-parasitic nematodes were surveyed at peach orchards in Gyeongbuk province for three years from 2000 to 2002. Species, density, frequency, Simpson's index, Shannon and Wiener index, and prominence value were analyzed. Plant-parasitic nematodes were isolated from 97 orchards out of 124 orchards. More important plant-parasitic nematode genera on peach were Tylenchorhynchus nudus, Criconemoides informis, Paratylenchus elachistus, Pratylenchus vulnus, and Helicotylenchus digonichus. Aphelenchus sp., Tylenchus sp., Heterodera sp., Scutellonema sp. were found, but were not important. Root-knot nematodes were not found even though they were serious in foreign countried.

• Korean Journal of Agricultural Science
• /
• v.46 no.4
• /
• pp.737-754
• /
• 2019

Peaches have soft tissues compared to other fruits and are vulnerable to softness, wounds, and loss of marketability due to the weak fruit hardness after harvest. It is necessary to develop a technology to improve the shelf-life of the fruit to expand the distribution of peaches. Calcium compounds and chitosan have an important role in improving the shelf-life of fruit by maintaining the hardness and reducing the respiration rate in peach fruits. In this study, to select useful compounds to improve the shelf-life of peaches, calcium citrate, calcium chloride, calcium nitrate, GH-Ca, OS-Ca, chitosan, and chitosan dissolved in calcium chloride were sprayed onto peach trees. The characteristics of the harvested fruits were investigated after the 'Kumhong' and 'Madoka' peach tree treatments. The hardness of the fruit was kept the highest with the combined treatment and remained high with the calcium citrate, chitosan and calcium nitrate treatments. Ethylene production and respiration were effectively inhibited by the GH-Ca and chitosan treatments. There was no significant difference in soluble solids content and acidity among the fruits treated with the chemicals. The coloration of the fruit skin was not delayed by the calcium and chitosan chemical treatments. Calcium compounds were increased in the fruits and leaves of the peach trees treated with the chemicals compared to the untreated ones. These results suggest that the calcium treatment extended the shelf-life by increasing the calcium content in the leaves and fruits of the peach trees.

• Research in Plant Disease
• /
• v.23 no.1
• /
• pp.75-81
• /
• 2017

In May 2016, 24 peach samples showing abnormal and virus like symptoms were collected in one of major peach producing area, Yeongcheon-si, Gyeongsangbuk-do, Korea. We performed RT-PCR diagnosis for confirmation of viral infection. The diagnostic targets are 17 species of viruses and viroids that quarantine and high risk pathogens when it occur. As a results, seven species of viruses and viroids, including an unreported (Apricot pseudo-chlorotic leaf spot virus, APCLSV) and a quarantine (Peach latent mosaic viroid, PLMVd) species in Korea, were detected. For the sequence analysis of unreported virus, APCLSV, the sequence of coat protein gene were amplified and cloned. The sequence showed 97% nucleotide identity with other APCLSV isolates and compared with other seven species of reported Trichoviruses. This virus was classified as APCLSV based on the sequence and phylogenetic analysis. This isolate was named Yeongcheon. As patterns of APCLSV occurrence, all samples that APCLSV detected were co-infected with Apple chlorotic leaf spot virus (ACLSV). As properties of ACLSV, APCLSV has high possibility of wide spread disease in fruit tree farms in Korea. Therefore, it is necessary to do related researches, such as infection route and influence of disease in commercial orchards.