propolisPropolis is a sticky resin appearing on bark and leaf buds from poplar, birch, willow, chestnut, pine... They make resin around their buds to protect them in the fall and winter against adverse weather, fungi and bacteria.. With this, bees are 'bricklaying' and closing all the cracks and crevices of their home. They prevent drafts. It is also a good way to fight viruses and bacteria.

A swarm of bees collect from 100 to 300 grams propolis per year. We can also reap propolis with a gauze (mosquito nets) that we attach to the upper edges of the hive with thumb tacks. The colony then seals the punctures with propolis.

There are also techniques to win bee bread.