Publications for:

pest = Heliotropium europaeum (weed)
crop = Sunflower (Helianthus annuus)
country = Spain (continental)

found 2 publications:

2003

Multi-species weed spatial variability and site-specific management maps in cultivated sunflower
Weed Science (2003) 51 (3), 319-328
publishers website - pestinfo wiki

1999

Weed seedbank response to crop rotation and tillage in semiarid agroecosystems
Weed Science (1999) 47 (1), 67-73
pestinfo wiki