title: Influence of biological control on seed productivity of brown knapweed (Centaurea jacea L.) in the Ukrainian Carpathians
abstract: The article presents data on the study of Centaurea jacea L. (Asteraceae) seed productivity in the Ukrainian Carpathians and significant impact of insects-agents of biological control on it. The negative factor that affects the reduction of seeds number in the capitulum is anthropogenic one — mowing down, trampling down (recreation, grazing). The stronger factor is zoogenic one — the impact of insects-consorts so called agents of biological control. The agents of biological control are the livin
journal: Agroecological journal