The fires have been on farmland in areas around Newton Abbot, Teignmouth, Paignton and Dawlish.
All the incidents involved a number of fire crews attending the scenes for long periods of time.
Safety advice has now been issued to farmers on how to reduce the risk of arson, including preventing easy access and installing security.
Supporting vulnerable a priority amid gas outage
List made of those needing urgent support
Concerns for missing Devon man
Corey Wade was last seen three weeks ago
Wintry conditions affect over 30 Schools
Wrap up warm!
Torbay's ASB squad crackdown on crime
Aggressive behaviour drops
Brixham Market on brink of breaking records
Fish sales across Torbay soar
NHS drone trial flies into Cornwall
Flying tech could save lives
