Answer: Dichlorodiphenyltrichloroethane (DDT) is an organochlorine insecticide. DDT causes the sodium channels in insect neurons to open which causing them to fire uncontrollably (repeatedly generate an impulse). This accounts for the repetitive body tremors, spasms and eventual death of the insect. Solution Answer: Dichlorodiphenyltrichloroethane (DDT) is an organochlorine insecticide. DDT causes the sodium channels in insect neurons to open which causing them to fire uncontrollably (repeatedly generate an impulse). This accounts for the repetitive body tremors, spasms and eventual death of the insect..