The move, likely to be confirmed by EU ministers meeting on Monday, will see the withdrawal of four planned appeals related to Indonesian imports and two for Argentina, according to an EU source.

The General Court of the European Union, the second-highest EU court, delivered a series of rulings in September 2016 to annul duties that the EU set for five years from 2013.

Both countries impose an export duty on the raw material, soybeans in the case of Argentina and palm oil for Indonesia, which the EU argued gave an unfair advantage to biodiesel producers there, allowing them to "dump" product at low prices.

Argentina and Indonesia, major producers of biodiesel, called the measures protectionist and launched challenges on a number of points at the WTO and the EU courts.

Argentina broadly won its case at the WTO, while a decision for Indonesia is pending.

The EU cut its anti-dumping duties last year to between 4.5 and 8.1 percent for Argentine biodiesel from initial rates of 22-25.7 percent. The rates for Indonesia remain those set in 2013 - between 8.8 and 20.5 percent.

(Reporting by Philip Blenkinsop; Editing by Alissa de Carbonnel and Adrian Croft)