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THE INSECTICIDAL PROPERTIES OF SOME EAST AFRICAN PLANTS: MUNDULEA SUBEROSA BENTH. 1 PART 2, CHEMICAL CONSTITUENTS
Author(s) -
WORSLEY R. R. le G.
Publication year - 1937
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1937.tb05860.x
Subject(s) - rotenone , biology , bark (sound) , botany , toxicology , ecology , biochemistry , mitochondrion
S ummary A series of substances has been isolated from a sample of Mundulea bark consisting of rotenone, white crystals which are probably a mixture of l ‐deguelin and tephrosin, yellow crystals which are probably dehydrorotenone, glucosides and alkaloids. Only the rotenone is appreciably toxic to aphides. The two sets of crystals having been obtained by use of alkali probably do not exist as such in the bark, but have been produced from a more toxic precursor, the existence of which must be assumed to account for the total toxicity of the sample. All attempts to isolate crystals other than rotenone without using alkali have failed completely.