Publications for:

pest = Sonchus oleraceus (weed)
crop = Cabbage (Brassica oleracea)

found 2 publications:

2009

Weed management in organically grown kale using alternative cover cropping systems
Weed Technology (2009) 23 (1), 81-88
publishers website - pestinfo wiki

2002

Post emergence spraying of clopyralid, picloram or pyridate in broccoli, Chinese cabbage, cabbage, or cauliflower kills weeds, with minimal crop damage
Australian Journal of Experimental Agriculture (2002) 42 (8), 1113-1117
publishers website - pestinfo wiki