The widespread distribution of Ambrosia artemisiifolia in plant communities leads to various changes in the vegetation cover. In general, 32 geobotanical descriptions involving ragweed have been analyzed in the Rostov region. There are 6 associations (Ambrosietum artemisiifoliae, Melilotetum albo-officinalis, Odontito-Ambrosietum artemisiifoliae, Ambrosio artemisiifoliae-Melilotetum officinalis, Ambrosio artemisiifoliae-Cirsietum arvensis, Ambrosio artemisifoliae-Chenopodietum albi) which belong to 3 unions and 3 classes.
T.A. Sokolova