CP25041Resistance to herbicides in the broadleaf weeds Raphanus raphanistrum, Sisymbrium orientale, and Sonchus oleraceus as determined by random weed surveys in south-eastern Australia
Herbicide resistant weeds are a major threat to crop production, with the broadleaf species wild radish (Raphanus raphanistrum), sowthistle (Sonchus oleraceus), and Indian hedge mustard (Sisymbrium orientale) being of concern in Australia. Surveys of south-eastern Australia conducted over a 5-year period found significant levels of resistance to Group 2 sulfonylurea herbicides with 66% of sowthistle, 34% of Indian hedge mustard and 16% wild radish populations resistant to this group. Lower levels of resistance were found to four other herbicide groups
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