<prompt> Insecticied of choice for sandfly?DDTHCHMalathioneParis green  <response>: The insecticide used to control sandflies is a single application of 1 to 2 gmsq.meter of DDT or 0.25gsq.meter is found to be effective DDT residue may remain effective for a period of 1-2 years and lindane only for 3 months. Parks Textbook of Preventive and Social Medicine, 25th Edition, Pg 845 