Effects of Mulch type, Times and Tuber Burial Depth on Growth and Tuber Production of Purple Nutsedge(Cyperus rotundus L.)

Purple nutsedge (Cyperus rotundus L.) is a problematic weed in vegetables production systems in eastern and southeastern of Iran, To evaluate the different levels of polyethylene mulches, Tuber burial depths, and times on Management on purple nutsedge, a factorial experiment base on randomized complete block design with four replications, at Jiroft University Research Farm, was conducted, field experiments to investigate the effect of mulch type including, (one and two layer clear polyethylene film, one-layer clear polyethylene + hen manure, one layer black polyethylene and non-mulched as control), second factor was times application at three levels including (20, 40 and 60 days) and third factor tubers burial depths at three levels including (5, 15 and 25cm) on C. rotundus above and below ground growth were conducted. Results showed that two-layer clear polyethylene mulch provided greatest suppression of C. rotundus growth was observed in plots covered with 2-layer clear LDPE, at 60 days in all depths (5,15 and 25cm). However, one-layer clear mulch at 60 days in 5 cm depth and one-layer clear polyethylene + hen manure at 60 days in 5 and 15 cm depth, inhibited viability tubers significantly. But positive effect was not shown on the growth control of the period in the other treatment. Generally, the results showed that two factors of polyethylene mulches and period of solarization of have a direct effect on the control of purple nutsedge.