Someone

on *:TEXT:!pestcontrol*:#: {
  if ($nick isop $chan || $nick ishop $chan) {
    if (*on* iswm $2) { 
      writeini pestcontrol.ini status $chan on | msg $chan Pest Control has been turned on for $chan }
        elseif (*off* iswm $2) { 
          remini pestcontrol.ini status $chan | msg $chan Pest Control has been turned off for $chan 
        }
      }
}