The effect of plant extracts of white cabbage (Brassica oleracea L.) seedlings on germination of some weed andculture plant seeds

This study is known as allelochemical effect of white cabbage (Brassica oleracea L.) seedlings of weeds purslane (Portulaca oleracea L.), lamb's quarters (Chenopodium album L.), black nightshade (Solanum nigrum L.) and redroot pigweed (Amaranthus retroflexus L.), with the culture plant maize (Zea mays L.) and sugarbeet (Beta vulgaris L.) seed germination was carried out between 2018-2019 in order to determine the effect. Methanol and aqueous extracts (30, 40, 50 %) of dry and fresh white cabbage seedlings were used in the study. While none of the applications of maize plants were effective, only dry methanol applied to sugar beet. The best result in weed seeds was obtained in dry aqueous application of 50 % concentration in European black nightshade. Purslane, lamb's quarters and Red root amaranth have generally shown the highest effect of 50% concentration of fresh methanol application. There are significant differences between the results obtained from cultivated plants and weed seeds which is an important result in terms of transferring this study to practice. Key words: Allelopathy, Brassica oleracea, Germination, Culture plant, Weed