Relative expression levels of five SfsHsp genes in the different tissues of Spodoptera frugiperda male and female adults. HD, head; TX, thorax; AN, abdomen; AA, antenna; CE, compound eye; FT, foot; WG, wing; MT, midgut; OY/TS, ovary/testis. Different letters above the bars indicate significant differences among tissues based on one-way analysis of variance followed by the least significant difference test (p < 0.05)