Used as an aid in the prevention of Nosema. Just add a teaspoon of Fumagilin-B to a gallon of sugar syrup. Feed this medicated syrup to each of your hives in the Spring (1 gallon per colony), Fall (2 gallons per colony), or as required. Your bees will reward you with lots and lots of honey. The .5 gram size is sufficient to prepare about 6 gallons of medicated syrup. Note: Never medicate when there is honey on the hive for human consumption.