EFIKASI HERBISIDA CAMPURAN FLUCHLORAMINOPYR-TEFURYL + ISOPROPIL AMINA GLIFOSAT UNTUK PENGENDALIAN GULMA PADA BUDIDAYA KELAPA SAWIT ( Elaeis guineensis Jacq. ) TANAMAN MENGHASILKAN
Abstract
Oil palm is a leading plantation commodity in Indonesia and plays a strategic role in the national economy. Chemical weed control using herbicide mixtures has become an alternative approach due to its broader weed control spectrum. This study aimed to determine the effective dosage of the herbicide mixture fluchloraminopyr-tefuryl + glyphosate isopropyl amine for controlling weeds in the weeded circle of mature oil palm plantations and to evaluate changes in weed composition following the application of the herbicide mixture. The study was conducted in Muara Putih Village, Natar District, South Lampung Regency, from October 2025 to January 2026. The experiment employed a Randomized Complete Block Design (RCBD) with six treatments and four replications. The treatments consisted of fluchloraminopyr-tefuryl+glyphosate isopropylamine herbicide doses of 1.5, 2.0, 2.5, and 3.0 L ha⁻¹, mechanical weeding, and an untreated control (without weed control). Homogeneity of variance was tested using Bartlett’s test, while additivity was assessed using Tukey’s test. If the assumptions were met, the data were analyzed using analysis of variance (ANOVA). Significant differences among treatments were further evaluated using the Least Significant Difference (LSD) test at the 5% significance level. Summed Dominance Ratio (SDR) data were analyzed descriptively. The results showed that the herbicide mixture fluchloraminopyr-tefuryl + glyphosate isopropylamine at doses of 2.5 and 3.0 L ha⁻¹ effectively controlled total weeds, broadleaf weeds, grasses, and sedges, and was also effective in controlling dominant weed species, including Asystasia gangetica, Cyperus kyllingia, Ottochloa nodosa, Paspalum conjugatum, Setaria barbata, and Synedrella nodiflora. Application of the herbicide mixture at a dose of 1.5 L ha⁻¹ resulted in changes in weed composition at 8 weeks after application.
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