How To Use Derris In A Sentence
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The insecticidal properties of Derris roots were first discovered in 1848 and the plant was first used against the nutmeg caterpillar.
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Besides muderrises and kadis, one other group within the learned profession deserves brief mention, namely the muftis.
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Second, spray the tree with derris, which is widely available, when roughly half the flower petals have fallen.
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Besides muderrises and kadis, one other group within the learned profession deserves brief mention, namely the muftis.
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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
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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.
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Cropping systemIncreasing the woody contents in leaf litterExamples of indigenous agroforestry systems: Use of derris as botanical pesticide
Chapter 15
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By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
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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
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Jam laced with derris, camphor, citronella or pepper also makes an effective bait.
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The solution for all is to spray with derris immediately any problem is noticed, plus a precautionary spraying about a week before the plants flower.
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MessageWorkshop to reviseList of participantsCurrent program thrusts in Upland developmentDegradation of the uplandsNutrient cycles in upland farmsEstablishing an swcsystemFarm management practices that reinforce SWCTraditional soil and water conservation (SWC) technologiesOptions for contour farming: Land management practices for improved water conservationIn-row tillageMaking an A-frameControlling Cogon and TalahibUse of derris as botanical pesticideFire control in the uplandsCultural management of pest infestationOrganic fertilizer sources: BiofertilizersSelection of cover cropsBatao in the upland.
Chapter 5
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By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
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Spray with insecticidal soap or derris as a last resort.
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This consisted of picking off the mature caterpillars and feeding them to the hens, and a liberal application of derris powder.
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By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
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Jam laced with derris, camphor, citronella or pepper also makes an effective bait.
