• Korean Journal of Plant Resources
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• v.24 no.5
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• pp.507-513
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• 2011

This study was conducted to evaluate the effect of mulching material and planting density on growth and bulb development of shallot. The transparent PE film was better than black PE film as a mulching material for the overwintering shallot crop. Transparent PE film mulching promoted plant growth and increased marketable yield by 21% as compared with that of the black PE film-mulched crop. However, the bulb size was not significantly affected by the type of mulching film. The height and width of ridge and planting density significantly affected the growth and bulb yield of the moisture sensitive shallot. Bulb yield of the shallot planted in five rows in 120 cm wide ridges (20,833 plants per 10 a) was 1,332 kg per 10 a, which was 1.7 times as high as that by the crop grown in three rows in 120 cm wide ridges (12,500 plants per 10 a). In conclusion, the shallot crop is recommended to be cultivated in five rows in 120 cm ridges mulched with the transparent PE film.

• Korean Journal of Plant Resources
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• v.24 no.1
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• pp.89-97
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• 2011

Shallot is a foreign crop introduced from France in 1995 as a new overwintering field crop with an aim to develop as an export crop. This study was conducted to investigate the effect of nitrogen fertilization level and time of supplementary nitrogen fertilization on growth and development of shallot, and to suggest to several problems raised during introductory trial cultivations. Optimum amount of nitrogen fertilization for bulb yield was 24 kg per 10 a. The best time of supplementary fertilization was February and March, with an equal amount in each month. The inorganic element composition of the harvested bulbs was not significantly affected by N fertilization level or by time of supplementary nitrogen fertilization.

• Korean journal of applied entomology
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• v.31 no.4
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• pp.360-365
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• 1992

Leaf feeding insect species of welsh onion and shallot were surveyed, and their species abundances were analyzed by fitness test for lognomal disstribution. A total of 13 and 6 species were identified on welsh onion and shallot, respectively. The dominant species on welsh onion were Thrips tabacid, Acrolepiopsis sapporensis, Spodoptera exigua, and Liriomyza chinensis. Thrips tabacid was also identified as the major species on the shallot. The community dominance was high in welsh onion and shallot observed on 12 October, Suwon. The species abundance patterns of the two communities were well described by lognormal distribution(P> 0.50).

• Korean Journal of Plant Resources
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• v.24 no.2
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• pp.160-167
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• 2011

Shallot is a foreign crop introduced from France in 1995 as a new overwintering field crop with an aim to develop as an export crop. During the introductory cultivation trials, several problems were raised such as premature growth depression in early summer, sensitivity to summer moisture, and weakened vigor of the seed bulbs following successive propagations. This study was conducted to develop proper cultural methods based on annual productivity and adaptability of growing area to address and suggest solutions to some of these problems. Bulb weight was 18.7 g and bulb yield per 10a was 4,113 kg in 1995. In 1996, bulb weight increased to 25.8 g, while bulbs yield per 10a deceased to 2,013 kg. This trend continued in 1997 so that bulb weight increased, and yield per 10a decreased as compared to those in 1996. However, in 1998, both bulb weight (21.1 kg) and yield per 10a (1,246 kg) decreased significantly as compared to those of the previous years. Plant growth from planting to April in the coastal area was better than in other areas. However, the plant growth thereafter until early July was better in the semi-highland area. As a result, the bulb yield in the semi-highland area was 57% more than that in the lowland areas such as the coastal area.

• Proceedings of the Korean Society of Plant Pathology Conference
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• 2002.11a
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• pp.109.2-110
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• 2002

• The Korean Journal of Food And Nutrition
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• v.11 no.6
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• pp.595-599
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• 1998

A batch experiment was conducted to evaluate the removal capacity of welsh onion(Allium fistulosum L.), shallot (Allium ascalonicum L.), garlic (Allium sativum L.) roots as an adsorbent for Ni and Pb in aqueous solution. One gram of the dried Allium root powder was reacted in 100ml of solution containing 10mg of each heavy metal and effects of metal concentration, pH, temperature, and size of adsorbent on the removal efficiency were evaluated. The results were as follows ; The amount of adsorption of heavy metal ions were higher with the smaller particles size of adsorbent. Garlic root was high adsorption capacity of Pb, especially. The higher concentration of heavy metal solution was, the more amount of adsorption of heavy metals was. The adsorption ratio was differed from a kind of heavy metal. As the temperature increased, the amount of adsorption of Ni and Pb by shallot and welsh onion were decreased. The amount of adsorption of Ni was high under alkali conditions but the amount of adsorption of Pb was high under neutral and acidity condition.

• Natural Product Sciences
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• v.2 no.1
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• pp.37-42
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• 1996

Several species and varieties of Allium spp. grown in Indonesia were screened for their in vitro antiplatelet aggregation activities. The extracts were also analyzed by GC for their volatile sulfur-containing compounds, and measured for their Volatile Reducing Substances (VRS) contents. Antiplatelet aggregation potencies of Allium spp. were varied among the species and varieties studied. Garlic extracts showed the greatest ability to inhibit platelet aggregation followed by extract of shallot, chive, yellow onion, and green onion. The 'Jawi' and 'local Padang' variety of garlic showed high activities with $IC_{50}$ values of 9.1 and $9.8\;{\mu}g/ml$, respectively. The local Kupang variety of shallot showed the highest antiplatelet activity among the shallot varieties evaluated, with an $IC_{50}$ value of $111\;{\mu}g/ml$. Antiplatelet aggregation activities of Allium extracts showed a positive correlation with the level of volatile compounds.

• Korean Journal of Agricultural Science
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• v.32 no.2
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• pp.223-231
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• 2005

In order to know the residual pattern of pesticides and predict to the degradation period until below MRL, we experimented diazinon, iprodinon and chlorfenapyr for shallot. They were the most detected pesticide in shallot by NAQS (National Agricultural product Quality management Service) survey. In this experiment, we sprayed those pesticides 15days before harvest and analyzed 0, 1, 2, 3, 5, 7, 10, 14 day sample to establish logical equation and to calculate $DT_{50}$. During the cultivating period, the residue amount of diazinon was changed from 1.02 mg/kg (0 day) to 0.01 mg/kg (14 day), $DT_{50}$ was 2.19 days, and iprodione was changed from 1.45 mg/kg (0 day) to 0.14 mg/kg (14 day), $DT_{50}$ was 4.15 days, and chlorfenapyr was changed from 1.5 mg/kg (0 day) to 0.01 mg/kg (14 day), $DT_{50}$ was 1.97 days. The $DT_{50}$ of double amount in those pesticides, diazinon was 2.24 days, iprodione was 4.82 days, and chlorfenapyr was 2.24 days, respectively.

• The Plant Pathology Journal
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• v.28 no.4
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• pp.454-454
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• 2012

• The Korean Journal of Food And Nutrition
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• v.9 no.3
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• pp.299-306
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• 1996

The study was performed under the various conditions, such as the edible parts and particle sizes of Allium. The concentrations, the temperartures, and the pH of heavy metal solutions to investigated their adsorption capacity of heavy metals by genus Allium. The adsorption amount of Pb by Allium in the aqueous soluton was apparently higher than that of Ni and Cu by them. The larger the particle sloe of welsh onion and shallot was, the higher the adsorption of Cu was. The adsorptlons of Cu, Ni and sorption ratio was not different. As the temperature increased, the amount of heavy metal adsorption increased in general, but the adsorption of Ni by welsh onion and wild garlic and leek, Cu by shallot, wild garlic and leek decreased. Adsorption of Pb to Allium was not affected by the different values of pH, and adsorptions of Ni and Cu were greatly affected by those of pH. Especially, the higher the pH was, the greater the Ni adsorption to Allium was, and the lower the pH was, the higher the Cu adsorption was. The correlation between the amount of components in edible parts of Allium and that of adsorption of heavy metals was significantly high In amino acids containing sulfhydryl group(-SH) and vitamin B2.