During the period, Vietnam shipped overseas 16,000 tonnes of peppercorns for 112 million USD, down 19.8 percent in volume and 36.3 percent in value compared to last year.
Business insiders attributed the reduction to a global oversupply trend.
Vietnam has seen a surge in the number of the pepper growers following increasing peppercorns prices in recent years.
The country accounts for 50 percent of the global peppercorns for trade, thus its growing yield is likely to diminish prices on the global market.
Currently, domestic peppercorn prices are under 120,000 VND (5.27 USD) per kg, about 35,000 VND (1.5 USD) less than that of the same period last year.
Do Ha Nam, head of the Vietnam Pepper Association (VPA), said the prices still bring profit for growers, and are higher than that of other industrial plants, such as coffee and rubber trees.
He pointed to accelerating quality management as a way to avoid external pressures to reduce price on the global market.
VNA/VNP