NOUN
- any of various usually woody vines of the genus Derris of tropical Asia whose roots yield the insecticide rotenone; several are sources of native fish and arrow poisons
How To Use derris In A Sentence
- The insecticidal properties of Derris roots were first discovered in 1848 and the plant was first used against the nutmeg caterpillar.
- Besides muderrises and kadis, one other group within the learned profession deserves brief mention, namely the muftis.
- Second, spray the tree with derris, which is widely available, when roughly half the flower petals have fallen.
- Besides muderrises and kadis, one other group within the learned profession deserves brief mention, namely the muftis.
- He directed his students to study fish poisons a decade or more before derris root went into mass production in the tropics as a source of rotenone, the most important biodegradable insecticide. One River
- For rotenone is no post-war insect killer cooked up in a corporate lab, but a natural product, extracted from the derris plant, and a mainstay of organic farms and gardens.
- Cropping systemIncreasing the woody contents in leaf litterExamples of indigenous agroforestry systems: Use of derris as botanical pesticide Chapter 15
- By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
- For example, rotenone, an insecticide derived from a tropical root called derris, is as poisonous to humans as organophosphate chemical pesticides. Organic Gardener's Composting
- Jam laced with derris, camphor, citronella or pepper also makes an effective bait.
