TIME TO . . .
Disease flourishes on tender new growth.
If your grass is growing well, and you are not on very sandy soil, consider not fertilizing. If your lawn just needs a bit of greening up, you can accomplish this with chelated iron. Centipede probably should not be fertilized any more this year, unless you have very sandy soil. Carpetgrass should be treated the same as Centipede. Only fertilize if rainfall is regular again or you can irrigate.