Mango prices in São Francisco Valley have dropped due to a potential strike at US ports, leading to a decrease in shipments and an increased domestic supply of Tommy mangoes, now priced at R$0.96/kg, a 22% drop from the previous week and below cost. Palmer mango prices have also decreased by 4% to R$2.25/kg due to the increased Tommy supply, and experts predict further price drops and high supply levels in the coming week.