Fumigation method

Which is the best alternative of fumigation (Formaldehyde +KMnO4)?

Now there is ban on use of formaldehyde KMNo4.
Currently peroxide based disinfectants can be used.

Correct now a days nobody can use fumigation as well this word also hydrogen peroxide +silver based disinfectant are currently used they called as fogging. this is suitable method for everywhere.

Mr. Amol & N.Kanagaraj,
Thanks a lot