The quality of most of the high and mid growns teas showed a general decline while only a limited selection of low growns maintained quality, brokers said.
Tea prices usually fall at this time of year with the end of the western quality season and increase in crops.
"There was good demand for low grown leafy types, while small leaf high and mid growns witnessed much less demand and consequently a sharp decline in prices," Forbes and Walker Tea Brokers said.
Ex-estate offerings totalled 1.5 million kilos, a 40 percent increase over the preceding week's auction quantities.
"Overall quality levels were irregular and much lower," the brokers said in their weekly auction report.
"The significantly larger weight on offer this week and the irregularities in quality would be a result of this week