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Weeds or wild plants?

Summary data

  Competivity1 nISpp2 nIFam3 RITBs4 Occurence5 Change6
Alopecurus myosuroides 12.5 6 3 n/a 38% +
Avena fatua 5 5 4 0 42 •
Chenopodium album 25 31 15 3 13% -
Cirsium arvense 16.5 50 9 1 n/a n/a
Fallopia convolvulus 12.5 n/a n/a 3 n/a n/a
Fumaria officinalis 60 3 1 1 17 n/a
Galium aparine 1.7 30 13 0 58% +
Matricaria perforata 12.5 31 15 n/a 67% -
Papaver rhoeas 12.5 8 7 n/a 18% •
Poa annua 50 53 15 2 79% •
Polygonum aviculare 16.5 61 15 3 n/a n/a
Senecio vulgaris 80 47 10 2 n/a n/a
Stellaria media 25 71 12 3 94% •
Viola arvensis 250 3 3 2 45% •
  1. Competitivity: Approximate number of weed seedlings that result in a 5% crop yield loss. Most competitive is Galium aparine at 1.7seedlings/m2, ast is Viola arvensis at 250 seedlings/m2.
  2. nISpp: Number of insect species recorded.
  3. nIFAM: Number of insect families. Assessed using CEH's PIDB represents the total number of insect species/families that have been recorded as occurring on that plant.
  4. RITBs: Relative direct importance to birds. On a scale of 0 to 3 - based on the number of seed-eating bird species that have been recorded as feeding on the seeds of that plant species.
  5. Occurence. Based on percentage of fields infested observed in a recent survey of arable fields in central and southern England.
  6. Change. The symbol indicates if the species has been increasing (+), decreasing(-) or remained roughly stable (•) over recent years.