Publications for:

pest = Persicaria maculosa (weed)
crop = Barley (Hordeum vulgare)

found 2 publications:

2008

Investigating the selectivity of weed harrowing with new methods
Weed Research (2008) 48 (6), 523-532
publishers website - pestinfo wiki

2005

Weed:spring barley competition for applied nitrogen in pig slurry
Weed Research (2005) 43 (1), 33-39
publishers website - pestinfo wiki