Black plastic: 11% of yellow nutsedge shoots punctured and emerged through; tubers were produced. <BR> <BR>Clear plastic: yellow nutsedge shoots did not puncture; caused yield reduction; tubers were produced. <BR> <BR>IRT plastic: suppressed yellow nutsedge emergence; prevented tuber production. Etiolated shoots persisted for 6 to 8 weeks<BR>Majek and Neary 1991<BR>