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Research conducted in an greenhouse during late rabi to determine the effect of different mulch materials on weed control in Cucumber seedlings (Cucumis sativus L. F1 hybrid “Multistar”). Among the different mulches i.e Black- black, Black-silver, Black-white, organic mulches like paddy straw, paddy husk, ground nut shells and pre-emergence herbicide (pendimithaline @ 1.0 kg a.i/ha-1) on weed control study showed significant differences on weed density (5.00 m-2, 7.33 m-2 and 6.00 m-2) and weed dry weight (2.20 g m-2, 2.43 g m-2 and 2.50 g m-2) were the lowest with the use of Black-black polythene mulch whereas control recorded the highest weed density (37.00 m-2, 40.00 m-2 and 39.00 m-2) and weed dry weight (27.93 g m-2, 28.20 g m-2 and 27.83 g m-2) at 30, 60 and 80 days after sowing respectively. Highest weed control efficiency (92.12%, 91.38% and 91.01%) was registered with Black-black polythene mulch whereas lowest weed control efficiency (55.93%, 56.02% and 56.88%) was registered with paddy straw mulch at 30, 60 and 80 DAs respectively. Weed index (74.83%) was significantly highest in Pre-emergence herbicide (Pendimithaline @ 1.0 kg a.i/ha-1), while lowest (3.65%) Weed index was registered with Black-silver polythene mulch.
Key words: Weed Density, Weed dry weight, Weed control efficiency, Paddy straw mulch, Pendimithaline.