Another negative factor was the global economy, which remained weak with no signs of a full recovery, making buyers hold back their orders or just buy in dribs and drabs.
With drops in Thailand's major food importers in Europe and the US, he said the FTI expected rising demand in Asean countries to help offset the dip.
The targeted countries in Asean where demand is expected to increase are the Philippines, Indonesia and Myanmar, said Mr Boonpeng.
"We are still concerned about the economy in the second half of this year, because we think it may not be as good as we expected earlier," he said.
"Moreover, we are not quite sure whether consumers feel confident to spend at a time when the economy has not yet fully recovered."
As a result, the club expects a poor performance in the food export sector next year as well. However, it is not ready to make a forecast for 2016 yet.