Publications for:

pest = Carduus acanthoides (weed)
crop = Alfalfa/lucerne (Medicago sativa)

found 2 publications:

2012

Grass-legume mixtures suppress weeds during establishment better than monocultures
Agronomy Journal (2012) 104 (1), 36-42
publishers website - pestinfo wiki

2003

Understanding mechanisms of reduced annual weed emergence in alfalfa
Weed Science (2003) 51 (6), 876-885
publishers website - pestinfo wiki