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The purpose of this research carried out in 2018 under Eskişehir ecological conditions was to determine the effect of six different harvest dates (T1: 16 August, T2: 29 August, T3: 14 September, T4: 28 September, T5: 15 October and T6: 31 October) on the yield and quality properties rosemary (Rosmarinus officinalis L.). The experiment was established according to a randomized complete-block design with four replications. The composition of the essential oil obtained by the hydro-distillation from the dry leaves of the rosemary plant was analyzed by GC-MS. In the experiment carried out, the mean values of plant height (cm), fresh herb yield (t ha -1 ), dry herb yield (t ha -1 ), dry leaf yield (t ha -1 ), essential oil ratio (%), essential oil yield were determined as 61.87 cm, 15.78 t ha -1 , 5.80 t ha-1, 3.55 t ha -1 , 0.69% and 23.92 l ha -1 , respectively. In the essential oil samples obtained from the harvests made at different dates, 35 different components were identified. The values of the camphor, 1-verbenone, α-pinene, borneol and 1,8-cineol components determined as the main component in the analyzed essential oil samples ranged from 11.67 to 14.78%, from 8.47 to 11.77%, from 8.74 to 11.82%, from 8.61 to 11.12% and from 7.01 to 9.07%, respectively.

Bu araştırmanın amacı lavandin (Lavandula × intermedia) bitkisinde farklı (Afyon, Eskişehir, Isparta ve Uşak) lokasyonların uçucu yağ oranı ve uçucu yağın kimyasal kompozisyonu üzerine etkisini belirlemektir. Bitkiler 4 farklı lokasyonda yetiştirilmiştir. 48 saat boyunca 35 °C'de kurutulmuş olan çiçek örnekleri, 210 dakika süreyle hidro-distilasyona tabi tutularak uçucu yağ oranları belirlenmiştir. Örneklerin uçucu yağ bileşenleri GC/MS cihazı kullanılarak tespit edilmiştir. Farklı lokasyonlardan elde edilen uçucu yağ oranları sırasıyla: %5.93 (Afyon), %5.63 (Eskişehir), %7.80 (Isparta) ve %6.57 (Uşak)'dır. GC/MS cihazında yapılan analiz sonuçlarına göre, uçucu yağ örneklerinde 40 farklı bileşen tespit edilmiştir. Analiz edilen uçucu yağ örneklerinin ana bileşenleri linalool (%41.34-53.10), linalil asetat (%1.83-23.54), kafur (%4.48-7.60) ve 1,8-sineol (%1.95-6.27)'dur. Sonuçlar; farklı lokasyonların melez lavantanın (Lavandula × intermedia) uçucu yağ oranı ve kimyasal komposizyonu üzerinde etkili olduğunu göstermiştir. Effect of Different Locations on Essential Oil Content and Chemical Composition inLavandin (Lavandula × intermedia Emeric ex Loisel.

The aim of this experiment was to determinate the effect of different drying temperatures on the content and chemical composition of essential oil of sage (Salvia officinalis L.). Essential oil isolated for 3 hours from fresh and oven dried leaf samples (at 35°C, 45°C, 55°C and 65°C) by using Clevenger type apparatus was analyzed with GC-MS. The content of volatile oils (%) in different drying temperatures was in the order of: fresh leaf sample (0,483%), dried leaf sample at 35 °C (1,837%), at 45 °C (1,550%), at 55 °C (1,267%) and at 65 °C (1,263%). In total, 36 compounds of essential oil were identified from fresh and dried leaf samples. The main compounds of essential oils isolated in different drying temperatures were α-thujone and camphore. α-Thujone was highest at fresh leaf sample (28,53%) and lowest at 45 °C (11,21%). The highest and lowest camphore contents were observed at sample dried at 35 o C (32,53%) and fresh leaf sample (23,62%). On the other hand, the ratio of 1,8-Cineole, effective in the medical use of sage, has also changed depending on different drying temperatures. The highest and lowest 1,8-Cineole ratios were observed at sample dried at 35 o C (9,480%) and fresh leaf sample (7,947%). Results showed that different drying temperatures were effective on essential oil content and chemical composition of essential oil of sage.

The experiments were conducted in two successive vegetation seasons of 2013 and 2014 at the Isparta and Eskişehir ecological conditions. The aim of this study was to determine the performance and stability of coriander genotypes for yield and yield components and essential oil content. In the study, Gamze, Kudret, Erbaa, Arslan and Pel-mus coriander cultivars and Burdur, Antalya and Tokat genotypes were evaluated growing seasons of 2013 and 2014 under the Isparta and Eskisehir ecological conditions in Turkey. Years and locations with different climatic and geographic characters had significant effects in coriander genotypes for yield, yield components and essential oil content. Increase in seed yield and decrease in essential oil content occurred with increasing rainfall. Results revealed that Arslan cultivar in Eskişehir location and Kudret in Isparta location had the highest seed yield. Besides Kudret cultivar and Gamze cultivar gave the highest seed yield as a means of locations; Eskisehir location had also higher seed yield.