Medak, Jan 9: More than Rs 5 crore worth of illegal ganja plantation was destroyed in Ratannayak tanda of Manuru mandal in Medak district on Saturday.According to Excise sources, the value of the standing and dry ganja plants destroyed by the department in the area stood at Rs 5 crore.“We have detected a large tract of cannabis crop scattered all over the district. We will continue to raid those areas,” the officials said.