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Lemongrass (Cymbopogon citratus (DC) Stapf) is a perennial aromatic grass that belongs to family Poaceae (Robbins, 1983). More than 140 species were reported among which Cymbopogon citratus (DC) Stapf is known for its aromatic herb and essential oil yield. Lemongrass is widely cultivated in the tropics and subtropics areas of the world (Punam et al., 2012). Scholars indicated that fresh herbs of Lemmon grass can be used medicinally and essential oil used as input for various industrial products (Tamuli et al., 2012). It is one of the prioritized and recognized aromatic plants in Ethiopia for herbal and essential oil yield. Currently, three varieties of Lemmon grass have been released recently and being under scaling up. According to Kassahun et.al. (2014), different Lemmon grass varieties can be grown for both herbage as well as essential oil yield in different geographical areas in Ethiopia. Besides, Bekele (2017) reported various Lemmon grass chemical compounds from which the most was citral (α-Citra and β-Citral) which is used in the synthesis of vitamins A & E, [3 ionone, methyl ionone, synthetic violets and non-toxic adhesives besides its use in perfumery and flavor industries (Robbins, 1983). However, herbal, essential oil yield as well as chemical constitutes of this important aromatic plant affected by genotype (Kassahun et.al., 2014), plant part, age and drying methods (Bekele, 2017) and other environmental as well as agronomic management practices (Lulie and Chala, 2016). Lemmon grass is plant that can be propagated either by vegetative Abstract: The experiment was conducted to determine harvesting cycle and appropriate number of tiller per planting slip using two different Lemmon grass varieties for better herbal and essential oil yield during 2017/2018 cropping season at Wondo Genet Agricultural Research Center. The design of the experiment was factorial RCBD design in three replications and the treatments of the experiment include combination of two Lemmon grass varieties with four level of number of tiller per planting slip (one, two, three and four tiller number per planting slip). Data on yield and yield components were collected and subjected to analysis of variance using SAS software version 9.3. Differences between means were assessed using least significant difference at 5% probability level. Results of the experiment showed that the interaction factors (Lemmon grass variety and number of tillers per planting slip) were non-significant for all parameters. However, there was significant variation between two Lemmon grass varieties in plant height, number of leaf per hill, fresh leaf weight, and essential oil yield where the higher values were recorded at WG-Lomisar-Java variety. Between the first and second harvesting cycles, there was variation in plant height and the higher values (133.79cm) were obtained at second harvest. Moreover, due to variation in number tiller per planting slip, there were significant and decreasing trend as number of tillers per planting slip increased from one to four for plant height, number of leaf per hill, number of tiller per plant, essential oil content, and leaf fresh weight while there was increasing trend for survival count. Therefore, we recommend variety WG-Lomisar-Java and planting slips having fewer number of tiller for fresh leaf weight and essential oil yield. For more a comprehensive result, the experiment should be repeated and more harvesting cycles should be considered further.

international journal of research studies in agricultural sciences

Herbage and Essential Oil Yield of Two Lemmon Grass (Cymbopogon Citratus) Varieties as Affected by Harvesting Cycle and Number of Tillers Per Planting Slips at Wondo Genet, Southern Ethiopia