I have been asked by our Canadian counterparts if anyone we know have sales of T-Nex being sold to airports to reduce mowing. I have done quite a bit of research on this topic in the past. It is a good use of Plant Growth Regulators. Many airports have to close runways when mowing is occurring or they have to mow at night.
A second important reason is many Plant Growth Regulators are foliarly absorbed. They need to be applied when you have enough foliage to absorb the spray.
Give 24-48 hours and then you can mow as short as needed.
A mistake made by many people is they mow short and then spray, which is the opposite of what should be done. You should spray, give 24-48 hours and then you can mow as short as needed and the Plant Growth Regulator will work fine.
The second use that is important at airports is that if you follow the correct procedure, you can reduce the actual height of the grass which removes cover for rodents and other ground animals. This reduces the food source for predator birds which reduces bird strikes.