1) Sand that section with a coarser grit paper and apply stain.
2) Repeat, #1 above, put when stain is applied, while still wet, rub this section with 0000 steel wool to work stain into grain.
3) Use a gel stain that's darker than the other sections, but still of a simialr tone.
Before doing any of these, test on the reverse side of the board
Bob "Boardman" Borders