Publications for:

pest = Cirsium (weeds)
crop = Clover (Trifolium)

found 2 publications:

2013

Interspecific relationships between white clover, Kentucky bluegrass, and Canada thistle during establishment
Agronomy Journal (2013) 105 (6), 1467-1474
publishers website - pestinfo wiki

2005

Quantifying the impact of a weed in a perennial ryegrass-white clover pasture
Weed Science (2005) 53 (1), 113-120
publishers website - pestinfo wiki