The child, who lived in Soi 11 in the Poonpol district of Phuket City, died of the mosquito-borne disease on September 10.
Poonpol was the area chosen to launch the campaign this week. For the next three weeks, local councils throughout Phuket are expected to spray more frequently.
Volunteers have also been walking the streets in many parts of Phuket, informing residents about the need to make sure there are no pools of water around so mosquitoes can breed.
One Phuketwam reader in Patong blamed pools in a vacant plot of land near his home for his debilitating dose of dengue, and wondered who to contact.
He is one of the 1885 cases recorded on Phuket between january 1 and September 13, with the deaths of victims recorded in Chalong and Thalang in April.
Thalang is the disctrict of Phuket where most cases have been recorded, followed by Kathu and Phuket City (Muang).
In order, the highest at-risk areas are Mai Khao (home to some of the island's top five-star resorts) Sarkoo, Thepkasattri, Paklok and Srisoonthorn.
While dengue is considered to flourish in urbanised areas, less developed parts of Phuket at present appear to be the ones where more work needs to be done.
The age groups most vulnerable are, in order, 15-24, 10-14, 5-9, 25-34 and birth to 4 years of age.
Phuket's Governor, Maitree Intrusud, told the anti-dengue launch that the key to avoiding an outbreak was to make sure there were no mosquito breeding grounds.
Community campaigns on islands around Phuket have shown that with vigilance, any place can become dengue-free.
If infected by a dengue-carrying mosquito, people usually suffer intense pain in joints and fever and are often unable to sleep.
They quickly become dehydrated. Anyone with a fever is advised to seek medical advice, rather than go to a pharmacy for medicine.