Adamczewski, KazimierzMatysiak, Kinga2024-06-262024-06-262012Polish Journal of Agronomy 2012, 10, 3–82081-278910.26114/pja.iung.107.2012.10.01https://bc.iung.pl/handle/123456789/1378The aim of the greenhouse experiments was to study the mechanism of cross- and multiple resistance of A. spica-venti to inhibitors of acetolactate synthesis (ALS). To determine the type of resistance to sulfonylurea herbicides, green mass of over ground parts of A. spica-venti plants was collected and examined. Of 3 tested weed biotypes characterized by cross resistance to sulfonylurea herbicides, 2 biotypes (R2 and R3) showed ALS gene point mutation at position Pro-197 conferring ALS targetsite- resistance. Within the group of 3 biotypes showing multiple resistance to ALS and acetylCoA carboxylase (ACCase) inhibitors the biotypes R4 and R6 with specific gene point mutation at position Pro-197 were also detected. The sulfometuron showed to be a useful tool to study weed resistance to sulfonylurea herbicides.application/pdfenApera spica-ventiherbicideschlorsulfuronfenoxaprop-P-ethylsulfometuronmechanism of resistanceinfo:eu-repo/semantics/article