How bees can be made more sensitive to the chemicals in our food

The honey bee, a vital pest of crops and flowers, is being targeted by the pesticide DDT and other insecticides.In recent years, bee populations in parts of the US and Europe have declined.These declines have been blamed on the effects of DDT, a class of chemicals banned by the World Health Organisation in 1985.Beekeeper Mike Brown, from the University of Minnesota, is one of those who has been wo...