"In that context, ladies and gentlemen I am reluctant to accept any move to import tea to this nation," he said according to a video recording sent to media.
"This nation should ban altogether importation of tea in order to ensure absolutely regulatory controls and supervision to maintain the integrity of tea, which should increase its export earning potentials three times from the current level at least over the medium term."
Jayasundera's remarks came as Sri Lanka's tea exporters have revived a plan to become a hub of the global tea supply chain by freeing the island to import and blending tea, adding value not only to Sri Lankan tea but also imports.
Dilmah is among key opponents of greater liberalization of tea imports. The firm and sections of the island's industry fear that a 'pure Ceylon tea' brand identity may be hurt by allowing more imports.
Last year Sri Lanka exported 322 million kilograms of tea, including re-exports of 22 million kilos of tea that is now allowed to be imported under special rules.It is not clear how a complete ban on tea would impact existing players.
Sri Lanka's exporters have been pushing for import liberalization which would allow Sri Lanka to become a key link in the global tea supply chain.
Sri Lanka has vast blending talent and fast shipping connections which proponents of the move believe will be give Sri Lanka an edge.
In contrast to tea, Sri Lanka's rubber industry has now become a part of the global supply chain, with large solid tyre makers setting up shop and even importing rubber for manufacture.
But tea has developed a different image. The industry itself has changed over the years. The island's most sought after tea is no longer the delicately flavoured high growns of yore, which have been unceremoniously thrown off their pedestal.
At an auction on April 20, low grown tea fetched an average of 447 rupees a kilogram compared to 362 rupees for the high grown product.
Sri Lanka's Tea Board chief told AFP, a French newswire that a committee has been appointed to study a proposal to import tea.
"We are carefully studying the proposals and the objective is to increase the overall revenue while protecting our brand image," Kuruppu was quoted was quoted as saying.
She said Sri Lanka needed to take a "realistic view" of the global market and capitalise on the lucrative blending operations without losing the country's reputation as a source of highly aromatic tea.