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.
Up to 60 more homes heading to East Devon
Plans for houses in Woodbury
Tourists to pay extra in South Devon car parks
Council warned not to punish towns with parking charge hike
Rise in violence among girls in Plymouth
There are three hotspot areas in the city
Major 2025 South Devon arts festival postponed
'There are just too many pieces of the jigsaw missing'
Council stands with farmers and writes to PM
It's a vindictive unfair approach to taxation" says member
£3 million of devolution cash for affordable North Devon homes
More than 80 homes will be delivered
