Effect of Essential Oils and Hydrosols from Some Selected Lamiaceae Species on Redroot Pigweed (Amaranthus retroflexus L.)

Yergin Özkan R., Tunçtürk M.

Romanian Biotechnological Letters, vol.26, no.2, pp.2471-2475, 2021 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 26 Issue: 2
  • Publication Date: 2021
  • Journal Name: Romanian Biotechnological Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), CAB Abstracts, Veterinary Science Database
  • Page Numbers: pp.2471-2475
  • Van Yüzüncü Yıl University Affiliated: Yes


Allelopathy refers to chemical effect of a plant direct or indirect on germination,

growth or development of neighboring plants. Allelopathy can be considered as a

component of biological control that reduces the development of other plants. This study

was carried out to determine the effect of Greek sage (Salvia fruticosa Miller), basil

(Ocimum basilicum L.), Dragonhead (Dracocephalum moldavica L.), spearmint (Menta

spicata L.), sage (Salvia officinalis L.), lemon balm (Melissa officinalis L.), oregano

(Origanum onites L.) and thyme (Thymus kotschyanus Boiss.) on the germination of

redroot pigweed (Amaranthus retroflexus L.) which causes significant yield loss in

agricultural production. Essential oil (9, 18, 36 μL/petri) and hydrosols (50, 75, 100%)

of aromatic plants were applied to determine their inhibition effects on seed germination

of A. retroflexus. The experimental design for in vitro was a randomized design with five

replications. It has been shown that germination rate was decreasing by the increased

concentration of essential oil and hydrosols of the tested plant species. Also, total

germination inhibition of A. retroflexus depended on the essential oil doses; the rate

ranged from-2.9 to 85%. Amongst the essential oils, the highest effect was observed in

spearmint with 7% germination rate. It could be considered as an important solution,

which would contribute in Integrated Weed Management of A. retroflexus by using

different concentrations of essential oil and hydrosols from aromatic plants.