After frequent rains my lawn has rust in it. Do I need to treat this situation or will it improve by itself?

Question

I also have some grub problem in areas of the lawn which I have treated with something that should fix the problem. Are the two related?

Answer 1

Rust is a fungal disorder and grubs are an insect pest, so the two are not directly related, and control methods and materials will be different. But climate and growing conditions factors can contribute to both.

https://www.gardeningknowhow.com/lawn-care/lgen/lawn-grass-rust-fungus.htm