Person: AHI KOŞAR, DİLAN
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AHI KOŞAR
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DİLAN
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Publication An unmanned aerial vehicle based artificial pollination in a frost-affected walnut(Ankara Univ, Fac Agriculture, 2023-01-01) Argaç, Adem; Koşar, Dilan A. H., I; SÖNMEZ, EKÜLE; AHI KOŞAR, DİLAN; Sönmez, Ekule; Ertürk, Ümran; ERTÜRK, ÜMRAN; Bursa Uludağ Üniversitesi/Ziraat Fakültesi.; JCE-7775-2023The winter and spring frosts pose a significant problem in many walnut cultivation areas as frost damage to catkins and female flowers results in low fruit set and yield. In January 2021, the temperature dropped to-17.2 degrees C in Yenisehir, Bursa, an important walnut production area in North-Western Turkey. The present study was carried out to determine the natural frost damage on catkins of some walnut cultivars and the effectiveness of an unmanned aerial vehicle (UAV) pollination, which has been developed and used in artificial pollination studies recently, on fruit set and fruit characteristics. For this purpose, two pollen concentrations (T1: 5% pollen two times; T2: 5% pollen in the first, 20% pollen in the second time) and the open pollination (control) were tested. Observations showed that frost damage on catkins varied from57.31% (Ronde de Montignac) to 99.33% (Franquette). The initial fruit set was significantly higher in the T1 (87.74%) followed by T2 (83.89%). The final fruit set in T2 (75.16%) was higher than the T1 (74.11%), but the difference was found to be insignificant. The box and whisker plot shows that UAV pollination treatments (T1, T2) increased the fruit set, although this not uniform on the tree compared to open pollination. The highest nut weight, thickness, and length were obtained from control, followed by T1. The results showed that the fruit set was higher in pollination with UAV, and using less pollen (T1) was sufficient for fruit set. The research results support the use of UAV treatment on supplementary pollination for walnut.Publication Effects of caprifig (Ficus carica var. caprificus) storage temperature and duration on the fruit productivity and quality of 'Bursa Siyahi' figs(MDPI, 2023-01-01) Ahı Koşar, Dilan; Ertürk, Ümran; AHI KOŞAR, DİLAN; ERTÜRK, ÜMRAN; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Bahçe Bitkileri Bölümü; JCE-7775-2023; AAG-7343-2021Caprification is the process of hanging caprifig fruits on edible fig trees to transfer the pollen inside the caprifig to the edible fig via the wasp (Blastophaga psenes) living in the caprifig. It needs to be repeated several times for the proper fruit set of edible figs. The present study was conducted to determine the change in the number of Blastophaga psenes, the duration of Blastophaga's exit, and pollen viability in case the caprifigs to be used in the caprification process are stored until use. The number of Blastophaga and in vitro pollen viability were tested at day 0 (harvest day) and after 4, 8, 12, 16 and 20 days of storage at three different temperatures (0, 4, and 8 degrees C). Afterwards, the effect of pollination frequency on the edible fig fruit set and quality was determined by using Blastophaga psenes as a vector in the pollination of stored caprifig fruits, pollinating five times with 4-day intervals and three times with 8-day intervals. Approximately a 50% reduction in the number of B. psenes was detected after 4 (180.22), 12 (174.11) and 16 (192.66) days of caprifigs storage at 0, 4, and 8 degrees C, respectively. The pollen germination percentage of the caprifigs increased with storage and was higher in those stored at 8 degrees C (43.96%) and 4 degrees C (41.70%). The highest fruit set was obtained when the caprifigs stored at 4 degrees C (76.41%) and 8 degrees C (71.38%) five times with 4-day intervals were used for pollination. The pollination practice repeated five times with 4-day intervals resulted in a lower proportion of extra-large fruits with a weight of >100 g, a higher proportion of fruits with no or slight ostiole damage and early ripening of fruits. These results suggest that B. psenes and pollen viability can be preserved by storing caprifigs at 4 or 8 degrees C and that fruit set and fruit characteristics would be positively affected with the use of stored caprifigs in the pollination practice repeated five times with 4-day intervals.Publication The effects of rootstocks on growth and development of sour cherry (Prunus cerasus L. cv. "Kutahya") in the growing conditions of Bursa(Tubitak Scientific & Technological Research Council Turkey, 2023-01-01) KOŞAR, MEVLÜT BATUHAN; Koşar, Mevlüt Batuhan; Koşar, Dilan A. H., I; AHI KOŞAR, DİLAN; Ertürk, Ümran; ERTÜRK, ÜMRAN; Bursa Uludağ Üniversitesi/Ziraat Fakültesi; Bursa Uludağ Üniversitesi/Orhangazi Yeniköy Asil Çelik Meslek Yüksekokulu.; JCE-7775-2023; AAH-1653-2021; AAG-7343-2021Turkey is one of the most important sour cherry (Prunus cerasus L.) producers in the world, mostly producing the cultivar "Kutahya." To date, no previous study published on the effects of clonal roodstocks on the growth and development, yield, and fruit quality of "Kutahya" sour cherry. Therefore, this study was carried out from 2015 to 2019 to determine the influences of SL-64, Piku 3, Maxma 14, CAB 6P and PHL-C rootstocks on vigor, yield, and fruit quality of "Kutahya" sour cherry cultivar in Bursa, Marmara Region, Turkey. The effects of rootstocks on blooming period, ripening time, trunk diameter, trunk cross-sectional area, pruning waste, fruit weight and volume, fruit stalk length, soluble solids content, titratable acidity, pH, and ripening index were evaluated. No sour cherry trees on CAB 6P and PHL-C rootstocks died throughout the study period whereas trees on SL-64 rootstock showed high mortality (87%) in the first year of the study. In general, CAB 6P rootstock promoted the highest vigor and annual and cumulative yield. Yield efficiency was the highest for PHL-C but it was not significantly different from that for CAB 6P. CAB 6P rootstock induced the highest fruit weight and volume whereas Maxma 14 rootstock induced the lowest. Moreover, CAB 6P tended to induce higher fruit stalk length whereas Piku 3 induced the lowest. The soluble solids content was the highest in fruit from trees grafted on Maxma 14 but without significant differences with those in fruit from trees grafted on other rootstocks. In general, CAB 6P and PHL-C rootstocks tended to induce higher titratable acidity. In light of the findings of this study, it is concluded that CAB 6P was the best-adapted rootstock and it is recommended for establishing orchards of "Kutahya" sour cherry in the Marmara region.Publication Effect of pollen sources on fruit set and quality of edible fig (Ficus carica L.) cv. 'Bursa siyahi'(Univ Agr Sci & Veterinary Med Cluj-napoca, 2022-01-01) ; AHI KOŞAR, DİLAN; KOŞAR, MEVLÜT BATUHAN; ORAN, SEYHAN; ERTÜRK, ÜMRAN; Bursa Uludağ Üniversitesi/Ziraat Fakültesi.; JCE-7775-2023; AAH-1653-2021; AAG-7343-2021The caprification practice has been used widely in fig cultivation because it affects the yield and quality of fig fruits, a phenomenon known as the 'xenia effect'. The present study was conducted to investigate the effects of pollen sources on fruit sets and fruit quality in the 'Bursa Siyahi' fig cultivar in 2017 and 2018. The eleven male genotypes and five cultivars were used as pollen source. The findings obtained in the present study showed that pollen sources significantly affected fruit set, early fruiting rate, fruit size, ostiole width, skin and flesh thickness, titratable acidity (TA), pH, and soluble solids content (SSC). The fruit set ratio varied from 32.02% ('16 03 06') to 76.66% ('16 08 07'), and fruit weight varied from 77.29 g ('16 03 06') to 106.88 g ('16 00 01') based on pollen sources. The ostiole diameter ranged from 3.84 mm ('16 ZF 08') to 7.67 mm ('77 00 01'). The skin thickness ranged from 3.01 mm ('Havran') to 5.35 mm ('16 00 01'). The principal component analysis was performed to distinguish the pollen sources for the 'Bursa Siyahi' cultivar. The analysis proposed that the most important factors affecting the fig quality can be reduced to five components. Fruit weight (0.958), skin thickness (0.810), flesh l* value (0.821), pH (-0.872), and SSC (0.836) value could be regarded as the characteristic indicators for PC1, PC2, PC3, PC4, and PC5, respectively. The results showed that '16 09 10', '16 05 03', '16 08 07', and '16 08 12' pollen sources are adequate pollinators for the edible 'Bursa Siyahi' Ig.