According to Kiran Kranthi, Director of the Nagpur-based Central Institute of Cotton Research (CICR), insecticide usage for bollworm control decreased after 2004, while the usage for sucking pest control increased after 2006. [...] According to the statistics compiled by Kranthi, the use of insecticide to control bollworm has dropped by 6,599 tonnes in 2003 to 222 tonnes in 2011. Similarly, the use of insecticides to control sucking pests has more than doubled from 2,909 tonnes in 2003 to 6,372 tonnes in 2011.