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The purpose of this research is to know whether the aqueous extract of mango leaves (Mangifera indica L.) affect the growth of purple nutsedge (Cyperus rotundus L.). This research conducted at Botanical Laboratory of Biology Department Faculty of Mathematics and the Natural Sciences University of Lampung from September to October 2017. This experiments were carried out in a complete randomized design with the main factors being aqueous extract of mango leaves with 5 level concentration : 0% w / v ( control), 5% w / v, 10% w / v, 15% w / v, and 20% w / v and consist of 5 replications. Parameters measured were shoot length, fresh weight, dry weight, and relative water content. The Levene test determined the homogeneity of variance at 5% significant level. Analysis of variance and Tukey HSD testis did at 5% significant level. The results showed that the concentration of extract was negatively correlated with shoot length where the shoot length was decreased significantly at 20% extract concentration. Total fresh weight was decreased significantly at 20% and correlated linearly negative with extract concentration. Total dry weight was decreased significantly at 20% extract concentration. There was no significant effect on relative water content. From this research, it concluded that aqueous extract of mango leaves at 20% extract concentration was decreased shoot length, fresh weight and dry weight of purple nutsedge.

Efek Alelopati Ekstrak Air Daun Mangga (Mangifera indica L. Var. Arumanis) Terhadap Pertumbuhan Rumput Teki (Cyperus rotundus L.)