Publications for:

pest = Portulaca oleracea (weed)
crop = Rape/canola (Brassica napus)

found 2 publications:

2008

Effect of different periodical weed interference on yield and yield component in winter canola (Brassica napus L.)
Asian Journal of Plant Sciences (2008) 7 (4), 413-416
publishers website - pestinfo wiki

2001

Critical period of weed control in spring canola
Weed Science (2001) 49 (3), 326-333
publishers website - pestinfo wiki