The charity promotes beekeeping as a way to combat poverty, and was founded in 1993.
Camilla, who is a keen beekeeper and has a series of hives in her garden in Wiltshire, said funds raised from the sale of her honey crop this year would go to the organisation.
She described via video message how bees were “vital to the natural world”, but can also be used to help provide a much-needed income for people living in some of the poorest countries.
The duchess said: “Today, on World Bee Day, it is a huge pleasure to speak to you as the first president of Bees for Development.
“As we all know, bees are vital to the natural world and an essential part of our fragile ecology.”
She continued: “Keeping bees and harvesting honey is an old-age tradition.
“But this remarkable charity has found a way to use the busy bee to help alleviate poverty and encourage biodiversity.”
She added: “It works to train and educate people in the simple methods needed to keep bees, often at little or no cost.”
“This in turn provides a much-needed income to people living in some of the poorest and most isolated communities in the world.
“And it means that there are healthy hives of bees working to pollinate crops.”
Bees for Development provides free information and support to beekeepers in more than 130 developing nations, and works directly with community projects in Cameroon, Ethiopia, Ghana, Somaliland, Uganda and Zambia.
It also champions the important role honey bees and other pollinators play in the UK.
The Prince of Wales also keeps bees at Highgrove in Gloucestershire, and at Birkhall where he and the duchess have been staying in lockdown.
It comes as the Duchess has been taking a more active role in the Royal Family as the COVID-19 pandemic rages on.
She and other members of the Royal Family have recently paid tribute to nurses around the world on International Nurses Day.
The family released a video of conversations with nurses and praised those in the profession amid the pandemic.
“This is rather an important day” for nurses, the Queen says on her phone call, “because they have obviously had a very important part to play recently”.