Kiambang Extract Effectiveness Test (Salvinia molesta D.Mitch.) as Bioherbicide in Controlling Pre-growth of Peanut Weed (Cyperus rotundus L.)

Kiambang extract (Salvinia molesta D.Mitch.) is an alternative to control Teki Weed (Cyperus rotundus L.), The aim of the study was test effectiveness kiambang as a bioherbicide and obtain best concentration in controlling pregrowth puzzle weed L.) . research carried out at Experimental Garden Nursery, Riau University, Jalan Bina Widya km 12.5, Simpang Baru Village, Tampan District Natural Materials Minerals Laboratory, Faculty Engineering, University. This conducted experimentally using one factor Completely Randomized Design (CRD). treatment for pre-growth used 5 treatments concentration, namely: 0%, 20%, 40%, 60% 80% repeated 4 times. data obtained were analyzed analysis variance (ANOVA) 5% level, then further tested Duncan's Multi Range Test (DMRT) level with SPSS 23. results showed that considered effective pre-emergent nut weeds. inhibiting shoots tubers 80%.