Why are bees important
They provide pollination services worth billions and support food chains
What proportion of human food is pollinated by bees
About one third
What was the value of pollination on cultivated plants in the UK in 2001
£120 million
What pesticides are especially harmful to bees
Neonicotinoids
When were three neonicotinoids banned in the EU
2018
What is the maximum size of a honeybee colony in summer
Up to 80,000 individuals
What proportion of bee species are solitary
Over 90 percent
What is haplodiploidy in bees
Males from unfertilised eggs females from fertilised eggs
How many days does it take for a queen to develop
16 days
How many days does it take for a worker to develop
20 days
How many days does it take for a drone to develop
24 days
What temperature is maintained in the brood nest
34 to 35 degrees Celsius
What are the first tasks of a worker bee
Cell cleaning and nursing
What are outdoor tasks of worker bees
Water carrying and foraging
Name two horizontal transmission routes for pathogens in bees
Direct contact indirect via equipment
What is vertical transmission of pathogens in bees
From queen to larvae
Name two parasitic mites of honeybees
Varroa destructor Acarapis woodi
What disease is caused by Paenibacillus larvae
American foulbrood
What disease is caused by Melissococcus plutonius
European foulbrood
Name two Nosema species affecting bees
Nosema apis Nosema ceranae
What is chalkbrood caused by
Ascosphaera apis
What is stonebrood caused by
Aspergillus spp
What virus causes deformed wings and paralysis
Deformed wing virus
What virus causes trembling and hairless abdomens in adult bees
Chronic bee paralysis virus