• Journal of Bio-Environment Control
• /
• v.18 no.4
• /
• pp.420-424
• /
• 2009

This experiment was executed to investigate the effect of the carpenter bee as a pollinator on the fruit set increment of sweet pepper in summer hydroponics in the alpine area of Gangwon province, Korea. Where the number of fruit sets were increasing during the treatment of pollination by the carpenter bee, total yields during the whole growing period were not different. The number of seeds per fruit in the treatment of the carpenter bee increased more than that in the control by 7.3 percent increment, but the percentage of blossom-end rot increased. As fruit weight range of SS size (below 120g) decreased and that of L size (from 181g to 210g) increased by the pollination treatment, so the percentage of standardized products for the export to Japan improved. Therefore this result was effective for the fruit production of high quality for the export to Japan and it will be necessary for further study on the method of reducing blossom-end rot to be done.

• Korean Journal of Organic Agriculture
• /
• v.24 no.4
• /
• pp.759-771
• /
• 2016

We compared the fruit set and the quality of the 'Niitaka' pear (Pyrus pyrifolia Nakai) among flowers pollinated by two bee species (Apis mellifera and Bombus terrestris) and pollinated artificial. The artificial pollination rate was 1.3 to 1.9 times higher than the bee pollination rate. Moreover, the artificially pollinated flowers produced fruit that was 5 to 10% higher in weight, 2 to 3% larger in size, and had a higher fruit shape index (L/D) than fruit pollinated by the bees. On economic analysis, net profit from insect pollinator was 93.5 to 97.1% of net profit from artificial pollination. Therefore, artificial pollination is more efficient than bee pollination in 'Niitaka' pear. However, regarding fruit quality and net profit, these results suggest that bee pollination can be an good alternative to artificial pollination in 'Niitaka' pear.

• Korean Journal of Medicinal Crop Science
• /
• v.7 no.2
• /
• pp.89-93
• /
• 1999

This study was carried out to investigate the effects of planting density, time and frequency of pinching on growth and yield of Lycium chinese Miller cultivated in vinyl house. This experiment was conducted at the experimental field of Cheong-yang Agriculture High School, Cheong-yang, Chung-nam province, in 1997 to 1998. The number of flowers, fruit setting number and dry weight of fruits per branch were increased as the spacings were wider, but the fruit yield per unit area was decreased up to the narrowest spacing plot of $60\;{\times}\;20cm$. The good results of growth status and fruit yield was obtained at the early pinching in May 5. As the more frequent pinching were treated, the more number of flowers and fruits per branch were produced, showing increase of fresh and dry yield, because of much more branches per plot.

• Journal of Korean Society of Forest Science
• /
• v.98 no.6
• /
• pp.676-680
• /
• 2009

The study was conducted to investigate the characteristics of growth and fruiting in chestnut trees by SCB (Slurry Compostion and Biofilteration) liquid fertilizer instead of Chemical fertilizer. The experiment was done between April, 2008 and September, 2009, using seven years old grafting trees 'Tsukuba'. Fertilizer treatment was designed as follows; SCB liquid fertilizer, chemical fertilizer, organic fertilizers and no fertilized. Results were as follows; In the 2nd year, height and basal diameter gain of 8.04% and 25.90% over than the 1st year by SCB liquid fertilizer. The number of burrs per bearing mother branch showed no significant increment by SCB liquid fertilizer but fruiting rate was higher than other treatments. These results indicated that the SCB liquid fertilizer has a value of new eco-friendly fertilizer.

• Journal of Bio-Environment Control
• /
• v.6 no.2
• /
• pp.97-102
• /
• 1997

To investigate the effect of nitrogen level on the yield and quality of watermelon(Citrullus vulgaris S. cv. Bocksubak), N levels of 250, 200, 140, and 0kg/ha with the conventional amount of K and P supply non-fertilization treatments were compared one anther. Plant height, leaf area, fresh weight and dry weight were better in nitrogen application treatments than no nitrogen and non- fertilization treatments. But there was no significant difference between nitrogen levels. Yield and fruit setting ratio were the highest in N level of 140kg/ha. Fruit weight was increased by N application, and soluble solids content was the highest as 12.5 $^{\circ}$Bx in N level of 140kg/ha. Nitrogen content of leaves was increased with the applied nitrogen amount and highest at the middle stage of growth. P content was no significant difference between treatments. Ca content was increased with the applied nitrogen amount and highest at the late stage of growth.

• Korean journal of applied entomology
• /
• v.46 no.2
• /
• pp.287-293
• /
• 2007

The pollinating activity of bumblebee, Bombus ignitus was investigated at the blossom of Peach [Prunus persica (L.) Batsch] planted in vinyl house. The major time of foraging activity by B. ignitus was between 08:00 and 7:00, and the peak time of pollinating activity by B. ignitus was 11 :00 in the peach vinyl house from February 28 to March 5 in 2002. The rate of fruit set and the rate of marketable fruit by foraging activity of B. ignitus were much better than artificial pollination, and the effect of labor reduction by the pollinating activities of B. ignitus released against th ε artificial pollination was took remarkable profits over 93%. Therefore, the foraging activity of B. ignitus in peach vinyl house brought satisfactory results among the rate of fruit set, the rate of marketable fruit and the effect of labor reduction against the artificial pollination.

• FLOWER RESEARCH JOURNAL
• /
• v.18 no.4
• /
• pp.271-277
• /
• 2010

The study is aimed to obtain the basic data for developing new variations of wild spring orchid. The results was investigated the capsules' formational characteristics and the germination ratio after having been self-pollinated by dividing the flowering period into the 5 stages into budding time, semi-flowering, full-flowering, 10 days after flowering, and 20 days after flowering. The fruit setting ratio was the highest as 100% in the plant which had been pollinated 20 days after the flowering, while the weight of the capsule was heaviest in the orchid which had been pollinated in semi-flowering period. As the result of investigating the germination ratio by dividing the period into 5 stages, it was the highest in the plant which had been pollinated during the semi-flowering period, and in the result of investigating the germination ratio by dividing the seeds harvesting days into the 3 stages, such as, 150 days, 165 days and 180 days after the pollination, it was highest as 5% in the orchid whose seeds had been harvested 150 days after the pollination. In the result of examining the germination ratio of the seeds treated with NaOCl, the those treated with 2% of NaOCl showed the highest as 67% in the germination ratio.

• Korean journal of applied entomology
• /
• v.42 no.4
• /
• pp.293-300
• /
• 2003

This study examined the foraging activities and the Influence of excessive foraging activity by B. ignitus workers on the quality of cherry-tomato fruits in cherry-tomato green-house. The peak time of pollination by B. ignitus worker was recorded at 8:00 and the average of foraging time on each flower was 11.7 secs. The total pollinating time of B. ignitus was 41 mins and 37 secs and its total number of visiting flowers was 195.2. The average time of staying on flowers was 8.8 ${\pm}$5.4 secs when two bumblebees were allowed to pollinate per Pyong (3.954 square yards) in the green house of tomatoes for 24 hours, but it was two times shorter (4.0${\pm}$3.1 secs) compared with that when one bumble-bee was allowed to pollinate per Pyong for one hour. The stamen color of tomato flowers visited by the bumblebee for one hour was brown while the stamen color for 24 hours was dark brown due to the frequent visiting. The average fruit bearing rate of the 4th-6th clusters of tomatoes visited for one hour was 48.9%, which was not significantly different from those allowed to visite for 24 hours. However, the number of seeds of flowers visited for 24 hours was 64.0, which was more than 55.3 seeds of flowers visited for one hour. The weight of fruit was 25.4 g and 24.4 g, respectively. The sweetness was not different significantly between one and 24 hours of visit (P > 0.05). The result revealed that end pro-duct of cherry-tomato was not influenced by over foraging activity of B. ignitus workers on tomato flowers.

• Korean journal of applied entomology
• /
• v.47 no.3
• /
• pp.293-298
• /
• 2008

This study was surveyed the effects by pollinating activity of Apis mellifera and Bombus terrestris released in the paprika vinyl-houses. The foraging activity and behaviour of A. mellifera and B. terrestris visited on the paprika flowers were nearly alike. The pick times of pollinating activity by A. mellifera and B. terrestris were showed the hightest at 11:00 and 15:00, and 09:00 to 11:00, respectively. The rate of fruit set by A. mellifera and B. terrestris released for pollinating paprika were same level with 94%, and these rate were higher than the fruit setting rate which was 92% by fan operated. The qualities of paprika produced by pollinators released were higher than those by fan operated. And weight per fruit, number of seeds per fruit and economical profit per 2,310 $m^2$ were over 10% higher than those by fan operated. Therefore the economical effects by the pollinating activities of A. mellifera and B. terrestris released in the paprika vinyl-houses were obviously demonstrated.

• Journal of Bio-Environment Control
• /
• v.23 no.3
• /
• pp.256-261
• /
• 2014

This study was carried out to determine the effect of the artificial pollination on fruit set, seed formation and fruit quality in kiwifruit and to confirm the effective pollination time for optimal fruit set in the shelter greenhouse cultivation. Also, the effect of artificial pollination practice by the pollen diluent solution was tested. By artificial pollination, fruit set, seed formation, and fruit quality was improved both in the open field condition and in the shelter greenhouse cultivation. In order to find the effective pollination period (EPP), artificial pollination was carried out every day until 7 days after full bloom. Number of seeds and fruit set rate and fruit growth of kiwifruit were no significantly different until 4 days after full bloom (DAFB), but, those of kiwifruit from 5 DAFB significantly decreased. Consequently, the effective pollination period of kiwifruit in the shelter greenhouse was 4 days after full bloom. Also, artificial pollination by the pollen diluent solution was showed the similar fruit set and fruit quality compare to that by lycopodium powder. Accordingly, artificial pollination by the pollen diluent solution should be very effective practice for labor saving in kiwifruit cultivation.