Allelopathic effect of plant species Aloe vera (L.) Burm. f. on weed species scentless mayweed and redroot pigweed

Cilj rada bio je utvrditi alelopatski utjecaj vodenih ekstrakata od vrste Aloe vera (L.) Burm.f. na klijavost i rast korovnih vrsta bezmirisna kamilica (Tripleurospermum inodorum (L.) C.H. Schultz) i oštrodlakavi šćir (Amaranthus retroflexus L.). Pokus je proveden u laboratorijskim uvjetima u Petrijevim zdjelicama, a istraženi su ekstrakti od svježe mase lista u koncentracijama od 2, 4, 6, 8, i 10%. Rezultati su pokazali da vodeni ekstrakti nemaju značajan alelopatski utjecaj na klijavost i rast klijanaca bezmirisne kamilice. Vodeni ekstrakti nisu imali značajan utjecaj na klijavost, duljinu korijena i suhu masu oštrodlakavog šćira, dok su duljina izdanka i svježa masa klijanaca bile stimulirane, posebice pri višim koncentracijama ekstraktaThe aim of the study was to determine the allelopathic effects of water extracts from Aloe vera (L.) Burm.f. on germination and growth of weed species scentless mayweed (Tripleurospermum inodorum (L.) C.H. Schultz) and redroot pigweed (Amaranthus retroflexus L.). The experiment was carried out in laboratory conditions in Petri dishes, and water extracts from fresh leaves were analysed at concentrations of 2, 4, 6, 8 and 10%. The results showed that water extracts had no significant allelopathic effect on germination and growth of scentless mayweed seedlings. Water extracts showed no significant effect on germination, root length and dry weight of redroot pigweed, while the shoot length and fresh seedling weight were stimulated, especially at higher concentrations of the extract