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Weeds or Wild Plants?
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PIE home page
Weeds or wild plants?
Summary data
Alopecurus myosuroides
Avena fatua
Chenopodium album
Cirsium arvense
Fallopia convolvulus
Fumaria officinalis
Galium aparine
Matricaria perforata
Papaver rhoeas
Poa annua
Polygonum aviculare
Senecio vulgaris
Stellaria media
Viola arvensis |
| Cirsium arvense |
Cirsium arvense is an aggressive perennial weed of grassland and arable crops. It spreads vegetatively by means of root fragments and until recently seed propagation was thought to be unimportant. Recent genetic studies have indicated that seed may be more important than had been thought. The widespread use of glyphosate pre- and post-harvest has reduced the frequency of this weed. It is visited by a wide range of insects and has some importance as a food source for farmland birds.
| Competitivity (seedlings/m2) | 16.5 | |||
|---|---|---|---|---|
| Number of insect species recorded | 50 | |||
| Number of insect families | 9 | |||
| Relative direct importance to birds | 1 | |||
| Occurence | Not enough information available | |||
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