Industry body ISMA today asked the government to seek preferential duty structure from Bangladesh and Sri Lanka for Indian sugar, which is expected to be in surplus on account of higher output estimates for the 2018-19 marketing year. While Bangladesh levys import duty of USD 150 per tonne on sugar, Sri Lanka imposes USD 100. The two neighbours import about 25-30 lakh tonnes of sweetener annually, ISMA said. "Indias sugar production may exceed in 2018-19 marketing year than 251 lakh tonnes estimated for the current year. So we may have surplus sugar for exports in 2018-19," Indian Sugar Mills Association Director General Abinash Verma said at ISMAs 83rd annual general meeting.