allelopathic effect of caraway essential oil and its alcohol extract on the growth of the field dodder growth on the Lucerne

Abstract

Pot trial was carried out at the plastic house of the Center for Desert Studies in the summer season of 2018 to test the allelopathic effect of the essential oil and the alcohol extract of caraway fruits on dodder growth lucerne. Trial consisted of two factors: extract type, represented by essential oil, extract of alcohol and the second concentration factor, with 0, 10% and 15% of the essential oil and the extract alcohol, the factors were completely distributed within with three replicates (CRD). Results showed the superiority of the alcohol extract in the rate of killing the dodder after 3, 6 and 9 after of spraying (36.12, 53.89 and 66.02%) and the re-growth lucerne after 9 and 16 after of spraying t-1 (12.00 and 16.1%) and the number of branches after 33 after of spraying (4.67 plan branch) and number of leaves after 33 days of spraying -1 (8.89 leaf-1) and plant height (8.00 cm), sequentially However, the 10% concentration increased the number of leaves and plant height after t-1 33 after of spraying (8.33 leaf plant and 8.17 cm), respectively. GC / MS analysis showed that there were 6 compounds in the essential oil and d-limonene and d-carvone were present (45.00 and 28.22%). and 21 in the non-fatty layer isolated from the alcohol extract. 9,12- octadecadienoic acid, 1,4-benzenedi carboxylic acid and octadecanoic ethyl ester were highest ratio of 29.73% and 21.55% 12.44%, respectively. While the number of compounds separated in the fatty layer isolated from the alcohol extract was 42 compounds, which contained compound