Single and Multiple Resistance of Eleusine indica from Asahan Regency, Indonesia

Eleusine indica population at oil palm estate in the Asahan Regency has never been reported to being resistant to glyphosate and paraquat. This research was aimed to the resistance classification of E. indica population to glyphosate from one of oil palm estate in the Asahan Regency and to find out of glyphosate-resistant Eleusine (GRE) biotype has been also resistant to paraquat. This research was conducted on Weed Research Center Land, Faculty of Agriculture, Universitas Sumatera Utara, Medan from September ۲۰۱۷ until May ۲۰۱۸. Single resistance evaluation of E. indica population was performed using glyphosate at the dose ۷۲۰ g a.i.ha-۱. However the multiple resistance of GRE biotype was performed using paraquat at rates of ۰, ۵۰, ۱۰۰, ۲۰۰, and ۴۰۰ g a.i.ha-۱ and glyphosate at rates of ۰, ۷۲۰, ۱۴۴۰, ۲۸۸۰, and ۵۷۶۰ g a.i.ha-۱. Susceptible-population (ESU-۰) was taken at ball field of Politeknik Negeri Medan (Medan City) as a comparison. The data were analyzed by ANOVA and followed by Duncan test at level ۵% using IBM SPSS Statistics software. The results showed that E. indica populations from one of oil palm estate in the Asahan Regency had survival of ۸۱.۴۸% (classified as glyphosate-resistant) and the dry weight of ۲۴.۳۵ g. Glyphosate at the dose ۲۸۸۰ g a.i.ha-۱ and paraquat at the dose ۲۰۰ g a.i.ha-۱ were effectively (۱۰۰%) controlled survival, tillers.pot-۱, fresh weight.pot-۱, dry weight.pot-۱ and mortality of GRE biotype. The resistance index value of GRE biotype to glyphosate and paraquat of ۴.۹۱- and ۱.۲۶-fold, respectively compared to susceptible plants.

Keywords:

Eleusine indica , Glyphosate , Paraquat , Resistant