Browsing by Author "Kural, Leyla"

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Allelopathic Effect of Extract, Essential Oil and Hydrosol of Rosemary (Rosmarinus Officinalis L.) on Some Weeds and Culture Plant Seeds
(Parlar Scientific Publications (p S P), 2020) Kural, Leyla; Ozkan, Reyyan Yergin
This study was conducted between the years of 2017-2018 to determine the effect of rosemary (Rosmarinus officinalis L.) of which its allelochemical effect is known, on the germination of some weeds such as; redroot pigweed (Amaranthus retroflexus L.), lamb's quarters (Chenopodium album L.), black nightshade (Solanum nigrum L.), and corn (Zea mays L.) and sugar beet (Beta vulgaris L.). In the study, the methanol, aqueous extracts (15, 20, 25 %), essential oil (9, 18, 36 mu L/Petri dishes) and hydrosol (4, 8, 10 %) of the rosemary was used. It was determined that the seed germinations of all test plants were inhibited in significant amounts depending on the increase of concentration in all applications performed. The highest effect was obtained from the methanol extracts and it was determined they had that inhibited the germination of seeds of C. album and B. vulgaris at a ratio of 96 %. According to the results obtained, it is considered that the plant of rosemary to have herbicide effect will contribute to the use and development of biopreparations, which are sensitive to the human health and environment; and in addition, to the pest control of integrated weeds.
Allelopathic Potential of White Cabbage on Some Plants
(Czech Academy Agricultural Sciences, 2020) Kural, Leyla; Ozkan, Reyyan Yergin
The aim of this study carried out in 2017-2018 was to determine the effect of white cabbage (Brassica oleracea L.), which is known to have an allelopathic effect on the germination of some weed and cultural crops seeds. In addition to weeds, Amaranthus retroflexus L., Chenopodium album L. and Solanum nigrum L., cultural plants such as Zea mays L., Beta vulgaris L., were used in this study. It has been shown that the seed germination rate was decreased by the increased concentration of white cabbage post-harvest leaves extractions, which were made with different concentrations of aqueous and methanol extracts (30, 40, and 50%). The methanol extract was found to be more effective in germination. According to these results, S. nigrum and Z. mays seeds were less affected than A. retroflexus, C. album and B. vulgaris seeds. In the light of these data, it is observed that extracts obtained from white cabbage can be effective on some weeds; however, it was concluded that in order to reach more definite conclusions, studies on the subject should be increased, and similar studies should be continued under greenhouse or field conditions.