Publications for:

pest = Hypericum perforatum (weed)
crop = Grasses/turf/rangeland

found 2 publications:

2009

Functional group responses to reciprocal plant litter exchanges between native and invasive plant dominated grasslands
Invasive Plant Science and Management (2009) 2 (2), 158-165
publishers website - pestinfo wiki

2002

Ecological relationships between poisonous plants and rangeland condition: A Review
Journal of Range Management (2002) 55 (3), 285-290
pestinfo wiki