Ecology is the interrelationship between organisms and their environment. The environment includes climatic, edaphic and biotic factors and it determines the distribution, prevalence, competing ability, behaviour and survival of the plant. During present investigation the phytosociological experiments were made in three selected study sites. The 43 associates was observed in Kuthulia and Padra locality where 41 associates was noted from Saman locality. The Ageratum conyzoides is recorded as dominant associates by calculating the IVI 7.612, 8.16 and 8.138 in all the selected sites viz., Kuthulia, Padra and Saman respectively. While the highest IVI of Bidens pilosa was observed 2.816, 2.694 and 1.499 in all localities. The highest IVI of Ageratum conyzoides was noted in Saman locality and highest IVI of Bidens pilosa is also Padra locality. It is due to some invasive plants are so successful in new environments may be that they bring novel mechanisms of interactions with the recipient community.