| dc.description.abstract | Eleusine indica (L.) has been widely reported to be resistant to the herbicide active ingredient glyphosate and this resistant population is used in several plantation locations in Indonesia. Various studies related to testing the doses of various active ingredients have been widely carried out, but testing of the active ingredients glyphosate, paraquat and ammonium glufosinate on glyphosate resistant E.indica growth phase has not been widely reported. This study aims to determine the growth phase that has the highest mortality rate of multiple E.indica biotypes by glyphosate, paraquat, and ammonium glufosinate at several levels of different herbicide doses. This research was conducted at the Pasar Baru Kelurahan Titi Rante Kecamatan Medan Baru Padang Bulan Medan bulan February-Mei 2023. This study used a factorial randomized block design. The first factor is the type of herbicide at several doses: paraquat (0, 75, 150, 300, 600, 1,200, 2,400g ba./Ha), ammonium glufosinate (0, 112,5, 225, 450, 900, 1,800, 3,600g ba ./ Ha) and glyphosate (0, 135, 270, 540, 1.080, 2.160, 4.320g ba./ Ha). The second factor was the growth of E.indica stages 4-6 leaves and 8-10 leaves which were tested on glyphosate resistant and sensitive populations of E.indica. The observed variables were: the proportion of survival of ERG and ESG after herbicide application (%), dry weight (g), relative dry weight (%) and LD50. The results showed that the application of ammonium glufosinate was better when E. indica was glyphosate resistant at stage 4-6 leaves (dose 1,800g ba/Ha) than at stage 8-10 leaves (3,600g ba./Ha) in terms of mortality observations. Mortality of glyphosate and paraquat resistant E.indica did not show a different response in the two growth stages, with the application of glyphosate doses of 4,320 g ba./Ha and paraquat 2,400 g ba./Ha both resulted in 100% mortality in both growth phases of E.indica glyphosate resistance. The LD50 value of E.indica resistant/sensitive population in glyphosate application was higher in stage 4-6 leaves (1:7.5) than in stage 8-10 leaves (1:4.2) as well as in paraquat application, namely stage 4- 6 leaves (1:5,5) and 8-10 leaves (1:4,23) but did not differ from the application of glufosinate at both stages (1:6). The highest degree of multiple resistance of E.indica glyphosate resistance was generally found in the active ingredient glyphosate (the highest between two stages 7.5 times the dose) was moderate in the active ingredient paraquat (the highest was above two stages 5.5 times the dose) and low in the active ingredient glufosinate (both stages 1.6 times the dose). | en_US |
