Monkeys at Lushan Mountain in Jiangxi province, one of the China's top scenic spots, have been put on contraceptives to curtail their breeding.

Specialists warn that this cannot control the number of monkeys as tourists are making the monkeys lazy by feeding them. With their food supply guaranteed, monkeys do not need to forage for food and have more time for breeding.

A park official said 50 monkeys were introduced to the scenic spot at the end of 2005, according to a China News Service report on Saturday. That number has more than doubled.