АГРОБІОЛОГІЧНА ХАРАКТЕРИСТИКА AMBROSIA ARTEMISIFOLIA L. В УМОВАХ ЛУГАНСЬКОЇ ОБЛАСТІ

Abstract

Current state of the flora of Ukraine, which is under constantly growing anthropic pressure, is characterized by the change in species composition and structure of vegetation, a significant increase in its role as an anthropophilic element. Big economic activity creates the prerequisites for the conversion of native vegetation to impoverished and less valuable, partly or wholly formed of synanthropic species, many of which are quarantine weeds. Invasion and further active distribution, and in some cases the expansion of the species of adventive fraction of the flora, take place both naturally and anthropically. In Luhansk region, the emergence and spread of quarantine weeds poses a threat of an expansive nature, as an aggressive quarantine species such as Ambrosia artemisifolia L. grows in all types of crop phytocenoses and beyond, and every year its habitats increase. The article shows the results of multi-year researches, aimed at establishing the directions of distribution and expansion of plant groups by the quarantine species of the Asteraceae family (Ambrosia artemisiifolia L.).The study shows that the number of the researched species in the last ten years has increased two- or threefold in such plant groups as agrophytocenosis, sylvophytoculturcenosis, urbophytoculturcenosis, meadows and pastures. In result , we emphasize that Ambrosia artemisiifolia L. is no longer a quarantine species to which restricted species belong, as this weed is infinitely distributed and is already a cosmopolitan, whereas phytosanitary services are commonly called quarantine, but limited Unfortunately, no one can expand it. In our opinion, time is significantly lost, and one way to prevent the further spread of Ambrosia artemisiifolia L. is the total mowing of plants before flowering of all populations in all crop plant groups (where it is impossible to apply chemical tillage) 5-7 times per growing season, not to allow the growing season replenishment of a bank of seeds of this weed in soil.