<prompt> All are true about DDT exceptKills mosquito immediatelyInsecticidal propeies discovered by Paul H. MullerResidual action lasts for 18 monthsContact nerve poison  <response>: DDT takes several hours to kill mosquito Dichloro Diphenyl trichloroethan DDT First synthesis by - ZIEDLER Propeies by - Paul muller Nobel Prize No repellant action Takes several hours to kill Residual action lasts for 18 months Most active form of DDT - PARA - PARA ISOMER Mode of action - At as a contactNerve poison - Inhibits Acetylcholinesterase 