GHMC claims that they have 150 fogging machines but it is not found to be sufficient as the estimated requirement is of 300 fogging machines.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/hyderabad-kanti-velugu-casts-shadow-dengue
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-chronicle-hyderabad
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/telangana
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dengue
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vector-borne-diseases
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hyderabad-t
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health