Summary
Detailed chemical examination of the roots ofD. ferruginea has now been carried out. Of the two varieties, the rotenone-free one is further characterised by not giving any crystalline component. The rotenonebearing variety yields besides rotenone (4·3%), only a small amount of dehydro-rotenone. The chemical chaaracteristics of rotenone-bearingD. ferruginea andD. elliptica are compared. It seems to be possible to use chemical composition to distinguish one from the other.
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Rao, N.V.S., Seshadri, T.R. Chemical examination of plant insecticides. Proc. Indian Acad. Sci. (Math. Sci.) 24, 344–348 (1946). https://doi.org/10.1007/BF03171069
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DOI: https://doi.org/10.1007/BF03171069