Get used to sweating. Practice and train your body to sweat cleanly and efficiently. Drink LOTS of water. Hot as hell here in austin, tx. I sweat plenty but don't usually smell day 1. In addition, I don't wear traditional deodorant. Just salt crystal everyday and patchouli oil every other. High tech fabrics also tend to smell worse. I prefer clean cotton shirt everyday in the summer. Oftentimes take two and let one dry and air out during the work day. Stay hydrated. Drink lots of water before you are thirsty and before riding.
Works well enough for me. 4 kids and still employed in spite of sweat from riding and other activities !