Solarization is the process of laying black pond liner on an area of yard to eradicate a problem plant or an area that requires a complete overhaul. 

Laying the pond liner over an area will smother or fry all vegetation underneath it. This is a convenient way to wipe out large problem areas or a quick way to restart a large spot in a yard. Total dieback can take anywhere from one week in the heat to two months in the cold. 

After removing the liner, it is important to work compost or organic fertilizer into the soil to restore life in the affected area. You want to immediately replant grass as well or weeds will try to invade the area. 

Sold as either pond liner or roofing underlay, this heavyweight (ask for 45-mil EPDM) works more effectively than black or clear plastic. it may be more expensive than plastic, but it lasts longer and is ultimately a better investment.