No. The host country is automatically accepted to participate in the FIFA World Cup. Previously, defending champions were also automatically accepted, a tradition that was stopped in 2006 and has not continued since. Now, defending champions must also compete in qualification matches hosted by their region's football confederation.
Canada may not host a world cup, as they have yet to qualify for a world cup.
Host countries automatically qualify for the World Cup when hosting it.
Brazil was the host country of 1950 FIFA World Cup. Brazil will host the 2014 FIFA World Cup.
To be a world cup host a country must apply to the fifa and demonstrate that its equipped to actually host a world cup.
Russia will be the host of the 2018 World Cup.
Italy hosted the FIFA World Cup in 1990.
The 2022 FIFA World Cup will be held in Qatar.
Russia will host the 2018 world cup.