{"references": ["BOGUZAS, V., MARCINKEVICIENE, A., KAIRYTE, A.: Quantitative and qualitative evaluation of weed seed bank in organic farming. Agronomy Research, 2(1)13-22, 2004.", "BUDKA, D., KHAN, N.A.: The effect of Ocimum basilicum, Thymus vulgaris, Origanum vulgare essential oils on Bacillus cereus in rice-based foods. EJBS, 2(1)17-20, 2010.", "\u010cANAK, M., PARABU\u0106SKI, S., KOJI\u0106, M.: Ilustrovana korovska flora Jugoslavije. Matica srpska. Novi Sad, 1978.", "D\u017dIGURSKI, D., NIKOLI\u0106, LJ., LJEVNAI\u0106-MA\u0160I\u0106, B.: Ecological analysis of the weed flora in organic production. Journal on Processing and Energy in Agriculture, 16(2)67-70, 2012.", "EL-BESHBISHY, H. A., BAHASHWAN, S.A.: Hypoglycemic effect of basil (Ocimum basilicum) aqueous extract is mediated through inhibition of \u03b1-glucosidase and \u03b1-amylase activities: An in vitro study. Toxicol.Ind. Health, 28(1)42\u201350, 2012.", "FILIPOVI\u0106, V., UGRENOVI\u0106, V.: Stanje u proizvodnji i sakupljanju lekovitog bilja u Republici Srbiji. Zbornik referata \"III Otvoreni dani biodiverziteta\", Pan\u010devo, 07.jun 2013., 3-20, 2014.", "GAJI\u0106, M.: Pregled vrsta flore SR Srbije sa biljnogeografskim oznakama. Glasnik \u0160umarskog fakulteta, Beograd, serija A \"\u0160umarstvo\" 54:111 -141, 1980.", "LANDOLT, E.: \u00d6kologische Zeigerwertezur Schweizer Flora. Offentlichungen der Geobotanishen Institutes der ETH, Stiftung R\u00fcbel, Z\u00fcrich, 64 Heft, 1977.", "LJEVNAI\u0106-MA\u0160I\u0106, B., D\u017dIGURSKI, D., NIKOLI\u0106, LJ.: Floristic analysis of weeds in organic production. Journal on Processing and Energy in Agriculture, 17(1)33-38, 2013.", "LJEVNAI\u0106-MA\u0160I\u0106, B., D\u017dIGURSKI, D., NIKOLI\u0106, LJ., BRDAR-JOKANOVI\u0106, M.: Korovi u organskoj proizvodnji za\u010dinskog i lekovitog bilja. Acta herbologica, 2014.", "MENALLED, F.D., GROSS, K.L., HAMMOND, M.: Weed aboveground and seedbank community response to agricultural management systems. Ecol. Appl., 9:634-641, 2001.", "MODNICKI, D., BALCEREK, M.: Estimation of total polyphenols contents in Ocimum basilicum L., Origanum vulgare L. and Thymus vulgaris L. commercial samples. Herba Polonica, 55(1)35-42, 2009.", "NIKOLI\u0106, LJ., D\u017dIGURSKI, D., LJEVNAI\u0106-MA\u0160I\u0106, B., \u010cABILOVSKI, R., MANOJLOVI\u0106, M.: Weeds of lattuce (Lactuca sativa L. subsp. secalina) in organic agriculture. Bulg. J. Agric. Sci., 17(6)736-743, 2011.", "NIKOLI\u0106, LJ., ILI\u0106, O., D\u017dIGURSKI, D., LJEVNAI\u0106-MA\u0160I\u0106, B.: Analysis of weed flora in conventional and organic potato production. Biologica Nyssana, 4(1-2)9-14, 2013.", "\u00d6ZCAN, M., CHALCHAT, J.C.: Essential oil composition of Ocimum basilicum L. and Ocimum minimum L. in Turkey. Czech J. Food Sci., 20:223\u2013228, 2002.", "RADANOVI\u0106, D., NASTOVSKI, T.: Proizvodnja lekovitog i aromati\u010dnog bilja po principima organske poljoprivrede. Lekovite sirovine, 22:83-99, 2002.", "ROSCHEWITZ, I., GABRIEL, D., TSCHARNTKE, T., THIES, C.: The effects of landscape complexity on arable weed species diversity in organic and conventional farming. J. Appl. Ecol., 42:873-882, 2005.", "VRBI\u010cANIN, S., KARAD\u017dI\u0106, B., DAJI\u0106-STEVANOVI\u0106, Z.: Adventivne i invazivne korovske vrste na podru\u010dju Srbije, Acta herbologica, 13(1)1-12, 2004.", "UJV\u00c1ROSI, M.: Gymn\u00f6v\u00e9nyek. Mez\u0151gazdas\u00e1gi Kiado, Budapest, 1973."]}

This study was aimed to compare weeds occurring in basil crops grown under conventional and organic production systems. Weed flora recorded in the conventional production consisted of 16 taxa, with Setaria glauca and Portulaca oleracea dominating. Concerning the organic plots, only seven taxa were noted and dominant species were Sorghum halepense and Amaranthus retroflexus. Unexpectedly lower floristic diversity in the organic agricultural system was caused by omitted application of fertilizers during three consecutive years, still unbalanced agro ecological conditions, partial isolation of the organic plots and the presence of even four invasive weed species.