To biology of Conyza canadensis (L.) Cronq. in the Bashkortostan Republic

Control of distribution of alien species is one of important ecological tasks. Studying of biological features of invasive species Conyza sanadensis under the conditions of the Bashkortostan Republic was the purpose of work. Conyza canadensis - the annual or wintering major root plant of North American origin from Asteraceae family - one of the most fissile invasive species of the Bashkortostan Republic. The species is blacklisted both in the republic, and in Russia in general. Research problems: searching of the centers of invasion, studying of morphometric parameters of species and their variability. Works were carried out in 3 regions of northwest of Bashkortostan Republic. Measurements were carried out in 6 ceno-populations on 25 plants of everyone by reference techniques, data processing - with use of statistical methods. For Conyza canadensis different levels of a variation of parameters - from low to very high are noted (Cv - 6,8 - 88,6%). The maximal values in the majority of parameters are noted in cenopopulation Tashkinovo 2. The high level of varia- bility of parameters testifies to high adaptation opportunities of species in new conditions of dwelling. Thanks to high seed productivity, growth rate, ecological plasticity, ability to fast expansion of the territory Conyza canadensis in the Bashkortostan Republic becomes a dangerous weed for agriculture, the cities and the settling.