<prompt> Insecticide of choice for sandfly?DDTMalathioneParis greenNone  <response>: Ans. is a i.e., DDT Resistance to DDT has not been demonstrated in sandflies A single application of DDT or lindane has been found effective in reducing sandflies. 7 DDT residue may remain effective for a period of 1 to 2 years and lindane only for a period of 3 months. 