Effect of salicylic acid concentrations and spray dates on growth of coriander plant (Coriandrum sativum L.) and essential oil content of its seeds

Abstract

"The experiment was carried out in fields of Agricultural Research and Experiments Station (2) affiliated with the College of Agriculture / Al-Muthanna University during growth season 2018-2019 to study the effect of spraying three different concentrations of salicylic acid (0, 100 and 200 mg.L-1) and spray date it at three different dates (60 , 90 and 120 days after planting) on growth of Coriandrum sativum L. and a volatile oil content in seeds. The experiment was applied using a randomized complete block design RCBD with three replications. The results showed that plants treated with salicylic acid (200 mg.L-1) was significantly outperformed of dry weight shoot, the weight of 100 seeds and seed yield gave (21.76 g.plant-1, 1.22 g and 7.79 g.plant-1) respectively. While, the plants treated with salicylic (100 mg.L-1) was significantly outperformed and gave highest values of essential oil percentage (0.87%) and essential oil yield (6.32 μl.plant-1). The plants that were sprayed with salicylic after 120 days of cultivation outperformed significantly in the weight of 100 seeds, seed yield and essential oil yield were gave (1.12 gm., 7.54 gm.plant-1 and 5.53 μl.plant-1). While, the highest values were recorded in the dry weight of the shoot total (20.51 g.plant-1) and in essential oil percentage (0.787%) in plants that were sprayed after 90 days of cultivation."