People visiting South Barrule plantation are being urged to stay out of restricted areas.
The government's warning follows an incident this week where someone entered a high-risk zone to film heavy machinery doing harvesting work.
There were also cases of the public approaching machinery during works on dirt roads.
In a social media post, the government is stressing that even briefly stepping into prohibited spaces poses a risk of serious injury or death.
Tree harvesting operations at the southern plantation are expected to continue for several months.
Bus services north and south face disruption later
Wildlife Trust unveils woodland plans
Deadline looms for by-election nominations
Biker in UK hospital after Mountain crash
Trial event closes roads in Peel and Ramsey
Requisition meeting for Garff voters
Castletown police station could be yours... for £250,000
Brewery advertising for operator for landmark Laxey pub