eng Enviro Research Publishers Current Agriculture Research Journal 2347-4688 2321-9971 2020-08-27 8 2 108 117 8767 article Kavita Khatri 1 Kiran Bargali 1 Bhawana Negi 1 S.S.Bargali 1 Department of Botany, D.S.B. Campus, Kumaun University, Nainital, Uttarakhand (263002), India Ageratina adenophora is a perennial herb of family Asteraceae expanding as a serious threat to ecological integrity and biodiversity. This study aims to assess the allelopathic potential of fresh and dry leaf and root aqueous extracts of this invasive species on germination, early seedling growth, seedling biomass and seed vigor of two rice (Oryza sativa L.) varieties namely 6444 and 2245. The result revealed that with increasing concentration of extract, inhibition effect also increases. Leaf extract was more inhibitory than root extract and dry plant extracts had higher allelopathic impact in comparison to fresh plant extracts. Among the two investigated rice varieties 6444 was more resistant to the fresh and dry leaf extract while 2245 was more resistant to fresh and dry root extract. This study will be helpful in assessing the effect caused by A. adenophora to rice crop and could be used in devising weed control strategy. http://www.agriculturejournal.org/volume8number2/germination-and-early-seedling-growth-of-two-rice-varieties-as-affected-by-invasive-ageratina-adenophora/ Ageratina adenophora; Allelopathy; Germination; Inhibition; Invasive; Resistant; Rice Varieties