Lonchocarpus, Derris, and Pyrethrum Cultivation and Sources of Supply
Interest in these plants, in addition to their effectiveness against numerous pests, is also because commercial pyrethrum and rotenone insecticides derived from these plants are also comparatively nontoxic to man and other warm-blooded animals. They may be used with safety in the household, for livestock dips and sprays, and on garden vegetables, fruits and canning crops.
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acres Agricola del Ecuador agricultural experiment stations altitudes Amazon average Belgian Congo Brazil British East Africa British Malaya Changi clones contain rotenone crop crude and powdered cultivation culture cuttings derris root developed disk florets eastern Peru Ecuador elliptica export Federated Malay feet fertilizer field filed in T. C. B. fish poison Foreign Agricultural Relations French Indochina germinate grow growers grown Guatemala harvest Hectographed inches insecticidal introduction garden Iquitos Kenya Krukoff lonchocarpus roots lonchocarpus species Lonchocarpus urucu machete methods mulch Netherlands East Indies nicou numbers nursery beds percent Peru Peruvian plantations planters plowed pounds propagating material Puerto Rico Experiment pyrethrin content pyrethrum pyrethrum flowers research workers Rico Experiment Station root system rotenoids rotenone content rotenone-bearing roots seed seedlings Short Short Short short tons soil sprays Tingo Maria tons tons tons trailing derris transplanting trellised plants United States imports urucu utilis Venezuela vines weeds Western Hemisphere yields