Beekeepers have raised concerns over the future of honeybees as an annual survey showed a “steady decline” in the honey crop.

The survey by the British Beekeepers Association (BBKA) revealed beekeepers in England produced an average of 11.8kg (26 lb) of honey per hive this year, down 1kg on last year.

While weather can cause fluctuations in honey yield, the organisation said it is the steady overall decline in quantity that is worrying, with long-time beekeepers saying a crop of 25-45kg was typical in the 1950s.

The survey also revealed the factors worrying beekeepers about the future of their honeybees, with almost two-thirds of keepers stating they are concerned about pesticides including neonicotinoids which have been linked to declines in bees.

A third of beekeepers feared the loss of forage from agricultural development, 28% were worried about varroa mite pests, 28% had concerns about the invasive Asian hornet which preys on honeybees, and 28% were anxious about climate change.

The survey of 1,446 beekeepers in England and Wales, members of the BBKA and the Welsh Beekeepers Association, found the south-east was the most productive area, producing an average of 13.6kg of honey per hive.

The east of England saw beekeepers get an average of 13.3kg of honey. The south-west and Wales, which suffered particularly wet summers, saw their crops drop to an average of 8kg per hive.

Britain differs from the rest of Europe in that beekeeping is mostly carried out by amateur beekeepers rather than bee farmers, the BBKA said.

Hives in suburban gardens were shown to be doing best, producing 12.5kg on average, while rural gardens were doing least well, with an average of 10.2kg of honey.

John Hobrough, who has recently been awarded his BBKA certificate for 60 years of beekeeping and is the BBKA’s “adopt a beehive” campaign representative in the north-east, said: “A honey crop of 50-100lb was typical when I started beekeeping in the 1950s.

“In those days farmers underplanted crops with clover to nourish the land; nowadays there just isn’t time or space for this style of farming. I think it is having a huge impact on the honey crop, by reducing the forage available not just to honeybees, but all our insects.”

Margaret Murdin, BBKA chairwoman, said: “Everyone can play a part in helping honeybees and all the other insects they love such as butterflies and bumblebees by planting the right sort of flowers and shrubs.

“Check the label to see that anything you plant will be rich in nectar and pollen as not all plants are equal in this respect. A crocus is so much better for bees than a daffodil, for example.

“Our survey shows that suburban gardens and urban roof tops produce some of the best honey crops, so how we garden really can make a difference.”