Özet:

In the present study, allelopathic effects of lavandin (Lavandula x intermedia Emeric ex Loisel. cv Super A) oil on germination and seedling development of common amaranth (Amaranthus retroflexus L.), dock (Rumex crispus L.) and wild mustard (Sinapis arvensis L.) and crop plants [wheat (Triticum aestivum cv Gün 91), sunflower (Helianthus annuus cv. Sirena) and chickpea (Cicer arietinum)] were investigated. All parameters were significant (p<0.01). The highest lavandin oil applications (20 µl and 4.0 mg kg-1) was decreased germination of dock (83.1% and 67.6%), wheat (70.0% and 85.0%) and chickpea (94.8% and 100.0%) respectively compared to control. However, germination rate of wheat, chickpea and dock seed in low doses of lavandin oil (3 µl and 0.5 mg kg-1) was higher than the other species. The increased doses of essential oil in pot study negatively affected the root length of dock, common amaranth and sunflower. The stem length of common amaranth, wild mustard and wheat at 0.5 mg kg-1 dose was increased by 20.1%, 22.5% and 1.0%, respectively. As a result, it was determined that lavandin oil (3 µl and 0.5 kg ha-1) at low doses significantly inhibited weed seed germination and was less damaging to crop plants seed germination.

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