| Impact ID | 8842 |
| Impact Type | Commerce |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Polygonum persicaria (spotted ladysthumb) can be very competitive with crop plants, particularly in moist soils, and as such, can have significant economic impacts in the requirements for the use of increased tillage and herbicides. However, exact data on costs due to the presence of this species are not known. It is a weed of 35 crops in 50 countries. |
| Reference | 28572 |
| Cost | |
| Location | |