Despite bumper production of watermelon in Dakope upazila of Khulna, frustration has gripped the growers as they are fearing huge losses for lack of buyers and low prices due to coronavirus outbreak.   Farmers said watermelons are rotting in the fields as there is lack of customers at the market due to the restriction in movement imposed to stop the transmission of the deadly virus.   Huge watermelons are likely to be damaged in the fields as those are not being harvested for lack of buyers, they said.