At the present, approximately 250 herbicide-resistant weed biotypes distributed among 52 different countries, involving at least 17 different modes of action were identified. Since 1974 glyphosate has been used worldwide. No case of evolved resistance to glyphosate under field conditions has been identified by 1993. The first case of glyphosate-resistant weed biotype has been documented in 1996. In the last eight yers the number of new cases is dramatically increased. To date, evolved resistance to glyphosate has been identified in accessions of Lolium rigidum from Australia and South-Africa, Lolium multiflorum from California (USA) and Chile, Eleusine indica from Malaysia, Plantago lanceolata from South-Africa, Conyza bonariensis from South-Africa and Spain, Conyza canadiensis from USA. The occurrence and spread of glyphosate-resistant C. canadiensis in the eastern US likely represents the greatest immediate concern and impact to corn and soybean production in the upper Midwest. The rapid increase in occurrence of glyphosate-resistant C. canadiensis biotypes is due in part to the widespread adoption of no-tillage Roundup Ready soybean production systems, but it is also due to the horseweed biology. The aim of the present study was to investigate the physiological and molecular basis of glyphosate resistance in two C. canadiensis biotypes (sampled in RR soybean fields from Ohio and Delaware, USA).
Physiological and molecular basis of glyphosate resistance in Conyza canadensis Cronq / Dinelli G.; Bonetti A.; Marotti I.; Minelli M.; Catizone P; Barnes J.. - ELETTRONICO. - (2005). (Intervento presentato al convegno 13th European Weed Research Symposium, tenutosi a Bari nel 19/23 June 2005).
Physiological and molecular basis of glyphosate resistance in Conyza canadensis Cronq.
DINELLI, GIOVANNI;BONETTI, ALESSANDRA;MAROTTI, ILARIA;MINELLI, MAURIZIO;CATIZONE, PIETRO;
2005
Abstract
At the present, approximately 250 herbicide-resistant weed biotypes distributed among 52 different countries, involving at least 17 different modes of action were identified. Since 1974 glyphosate has been used worldwide. No case of evolved resistance to glyphosate under field conditions has been identified by 1993. The first case of glyphosate-resistant weed biotype has been documented in 1996. In the last eight yers the number of new cases is dramatically increased. To date, evolved resistance to glyphosate has been identified in accessions of Lolium rigidum from Australia and South-Africa, Lolium multiflorum from California (USA) and Chile, Eleusine indica from Malaysia, Plantago lanceolata from South-Africa, Conyza bonariensis from South-Africa and Spain, Conyza canadiensis from USA. The occurrence and spread of glyphosate-resistant C. canadiensis in the eastern US likely represents the greatest immediate concern and impact to corn and soybean production in the upper Midwest. The rapid increase in occurrence of glyphosate-resistant C. canadiensis biotypes is due in part to the widespread adoption of no-tillage Roundup Ready soybean production systems, but it is also due to the horseweed biology. The aim of the present study was to investigate the physiological and molecular basis of glyphosate resistance in two C. canadiensis biotypes (sampled in RR soybean fields from Ohio and Delaware, USA).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
