The essential ingredient in the space sprays for vector control is -: (A) Malathion, (B) Fenithion, (C) Fenithion, (D) BHC
Answer is C. Residual insecticides: new equipment has been developed for ULV space spraying.The most extensively used insecticides are malathion and fenitrothion for ULV fogging (refer pgno:773 park 23 rd edition)