Derris or Tuba Root

Abstract

Derris root is one of the most powerful insecticides known, but is harmless to man and animals. It does not possess the rapid "knockout" power of pyrethrum, but weigh,t for weight its eventual killing power is ~reafer. It is finding increased commercial use mous~hold sprays (mixed with pyrethrum), III fruit sprays, and in cattle dips; the powdered rl100t is also much used for dusting purposes.