“…is compromised, due to the presence of a dense and shallow root system with multiple secondary and adventitious roots (Canne, ). Moreover, both species are characterised by a number of biological characteristics that make them very prolific: the production of a great number of seeds in a wide range of environmental circumstances (Usami, ; Rai & Tripathi, ), the lack of seed dormancy of freshly produced seeds (Ivany, ; Warwick & Sweet, ; Martínez‐Ghersa et al ., ), a short life cycle with rapid early growth and development (Rai & Tripathi, ; Warwick & Sweet, ), early flowering (Pladeck, ; Warwick & Sweet, ), enabling several generations per growing season (Riemens & van der Weide, ), easy vegetative reproduction by adventitious root formation of clipped stems under moist conditions (Ivany, ; Warwick & Sweet, ; Damalas, ) and the ability to set seeds on uprooted or clipped flowering plants (van Poeteren, ). Only intensive weed control with several passes across fields is able to control these weeds.…”