Abstract
Abstract: Eleusine indica population from several estates in Padang Lawas and Tapanuli Selatan Regency, Sumatera Utara Indonesia has never been reported to be resistant to glyphosate herbicide. This study aims at distribution mapping and resistance classification of Eleusine indica glyphosate-resistant populations from several estates in Padang Lawas and Tapanuli Selatan Regency, Sumatera Utara. This research was conducted at Weed Research Center of the Faculty of Agriculture, Universitas Sumatera Utara from October 2016 to August 2017. This research used glyphosate at the recommended rate of 720 g ai ha-1 and three replications. Population ESU0 (from Politeknik Negeri Medan Ball Field) as a comparison. Data analysis using t-test at the level of 5% with IBM SPSS Statistics 20 software. The results showed 22 populations in Padang Lawas Regency have 8 populations classified as glyphosate-resistant (36.36%), 8 populations classified as developed-resistant (36.36%), and 6 populations classified as glyphosate-susceptible (27.27%). While from 6 populations in Tapanuli Selatan Regency have 5 populations classified as glyphosate-resistant (83.33%), 1 populations classified as developed-resistant (16.67%), and 0 populations classified as glyphosate-susceptible (0%). Keywords: glyphosate, goosegrass, oil palm plantation, resistance.
Highlights
Goosegrass [Eleuisine indica (L.) Gaertn] is one type of weed that is commonly found and cause problems in oil palm plantations
If at the beginning of the use of the herbicide found the types of weeds that diverse but after the use of the herbicide repeatedly diversity and weeds to be low once the dominant weed species becomes more difficult to control [1].Goosegrass is classified as a weed that grows rapidly so that full control is required
Goosegrass population from several estates in Padang Lawas and Tapanuli Selatan Regency, Sumatera Utara Indonesia has never been reported to be resistant to glyphosate herbicide
Summary
Goosegrass [Eleuisine indica (L.) Gaertn] is one type of weed that is commonly found and cause problems in oil palm plantations. If at the beginning of the use of the herbicide found the types of weeds that diverse but after the use of the herbicide repeatedly diversity and weeds to be low once the dominant weed species becomes more difficult to control [1].Goosegrass is classified as a weed that grows rapidly so that full control is required These weeds flower throughout the year and each plant can produce up to 140,000 seeds per plant [2] and has been reported glyphosate-resistant from several oil palm plantations in Sumatera Utara [3,4,5,6,7]. The purpose of this study is to map and classify distribution resistance of goosegrass population to glyphosate herbicide from several oil palm estates in Padang Lawas and Tapanuli Selatan Regency, Sumatera Utara
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