They set up a controlled experiment in Punjab earlier this year comparing the behaviour and productivity of bees in two hives – one fitted with two mobile telephones which were powered on for two fifteen minute sessions per day for three months. The other had dummy models installed.
After three months the researchers recorded a dramatic decline in the size of the hive fitted with the mobile phon, a significant reduction in the number of eggs laid by the queen bee. The bees also stopped producing honey.
The queen bee in the "mobile" hive produced fewer than half of those created by her counterpart in the normal hive.
They also found a dramatic decline in the number of worker bees returning to the hive after collecting pollen. Because of this the amount of nectar produced in the hive also shrank.